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Why is it controversial to install mobile phone signal jammers in school dormito
Jammer B. | 16.04.2024 
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Students believe that freedom of communication is restricted, the school explains in detail four considerations, and dormitories have fixed phones
"The school has installed mobile phone signal jammers on each floor of the dormitory. There is no mobile phone signal in the dormitory, and it is impossible to contact the outside world in time." An anonymous netizen sent the above message to the Zaobao reporter online, complaining about the restrictions of a middle school in Jinjiang They have freedom of communication and mobile phones have become a decoration. The reporter went to verify the report yesterday.
https://www.silencejammer.com/
It is very inconvenient to not be able to use mobile phones in the student dormitory
At around 11 o'clock yesterday morning, reporters came to the entrance of the middle school for interviews. A senior high school girl confirmed the netizen’s complaint. She said: "The dormitory building has been equipped with jammers. As soon as I return to the dormitory after class, there is no signal on the mobile phone." The cousin who came to pick her up said: "Her mobile phone often has no signal and she cannot contact anyone in time. If it’s really urgent, you have to tell the security guard and then communicate it through the security guard.”
Xiao Su, a second-year junior high school student, also said that the high school dormitory building is indeed equipped with jammers, but the junior high school has not. However, she heard that the junior high school will also install jammers next.
Several first-year high school boys further revealed that the school installed mobile phone signal jammers in the second semester of last year, and the jammers were installed in their dormitories. “When I have dinner at noon or return to the dormitory after class in the afternoon, there is basically no signal. You have to use the dormitory phone for phone calls." When the reporter asked them if they had mobile phones, a boy shouted: "If there is no signal, it is useless to have a mobile phone!"
The reporter followed several boys to the high school boys' dormitory. In the dormitory on the second floor, a boy led the reporter to find the jammer in the corridor. The reporter then tried dialing a few calls on his mobile phone in the corridor, and the call went through. "The jammer is sometimes on, sometimes off. Maybe it's not on now," the boys said.
One boy said: "The jammer makes people feel like they have a headache. Three or four students have this feeling."
The school has carefully considered and solicited opinions in advance
The relevant person in charge of the middle school told reporters that the school installed mobile phone signal jammers after careful consideration. There were four main considerations.
The first consideration is that some students will send messages to each other through mobile phones during exams, and even search for essays online to plagiarize. It is hoped that installing a blocker will prevent candidates from using mobile phones to cheat.
The second is that many students will lie in bed and surf the Internet after class or evening self-study. However, there is a lot of bad information on the Internet, which is very detrimental to students' growth and learning.
The third reason is that some students send text messages and make love calls after studying in the evening and before going to bed, which affects their study the next day. They are already high school students and are in a critical period.
Fourth, during the period after lights out for evening self-study, students are doing various activities on their mobile phones while lying in bed, and student administrators have no control over the students.
The person in charge said that in view of the above factors, the school chose to turn on the jammer to block mobile phone signals during the two periods of time after the lights are turned off at noon and evening self-study, "outside the monitoring line of sight", and the jammer was turned off at other times. He said that the school also considered that it could not affect the contact between students and parents, so it reduced the coverage of the jammer to only the dormitory buildings. "It will not affect the communication between home and school. The dormitories have fixed phones and IC card phones, etc. It will not affect the communication between students and teachers."
Before installing the jammer, the school did some research. The person in charge said, "The school sent a letter to parents, and many parents supported this approach." In addition, the school also held a mobilization meeting for students. Most students were in favor, but only a small number of students had opinions.
As for some students, they think jammers can cause headaches. The person in charge said that there is currently no scientific evidence that jammers can cause headaches, and the school will ask experts to investigate. If experts determine that there is an impact, the school should make adjustments, "everything must be based on the interests of students."
Parents understand that the school’s approach of not shielding is indulging.
The reporter randomly interviewed several parents, and most of them expressed understanding of the school's approach.
Parents of students who support the school’s approach believe that most mobile phones have game and Internet functions. If students are addicted to games and Internet access, it will affect their rest and prevent them from concentrating on their studies. There are all kinds of information on the Internet now, including some bad information. Frequent viewing of this information has a very bad impact on children. It is necessary for schools to block mobile phone information to protect students.
They believe that the main task of children is to study. If they need to contact home or friends, the telephones in the dormitory and campus are enough for them to use. They believe that excessive use of mobile phones is a waste of time, and mobile phones also provide convenience for early love. The school does not block mobile phone messages but makes them more indulgent.
Some parents also expressed different opinions. "Nowadays, high school students are 17 or 18 years old and have become independent. Will installing mobile phone jammers affect their freedom of communication?" Ms. Zhang, a parent of the student, believes, "Students learn on their own initiative, and the school's approach may be unilateral. ‘Wishful thinking’, restricting students’ use of mobile phones may not necessarily allow them to study with peace of mind.”
Education Department:
Protect students’ physical and mental health
More reasonable than “confiscating” mobile phones
Regarding this matter, Zhuang Yingduan, director of the Jinjiang Municipal Education Bureau, said that using mobile phones during breaks is not conducive to students' rest, and some bad information on mobile phones also has an adverse impact on their physical and mental health. The school blocks mobile phone information during specific periods to protect students' physical and mental health.
He said that mobile phones are not the only tool for students to communicate with the outside world. The school has installed fixed phones in student dormitories, and there are also magnetic card phones on campus. These phones ensure students' external contact. Blocking information on mobile phones during specific periods is generally conducive to children's rest and study, and most parents and teachers support this. It is understandable that students have different opinions. The school can publicize more to students and explain more to parents. When they know that this is conducive to protecting the healthy growth of students, they will provide understanding and support. Schools in other regions also have similar management measures, such as "confiscating" mobile phones, storing mobile phones, etc. Compared with these measures, blocking mobile phone information is more practical.
Lawyer’s statement:
No absolute freedom of communication
It is normal management behavior
Lawyer Zhang Chuanjiang, a member of the Zaobao Legal Advisory Group, believes that judging from the school's specific practices, the school's behavior of blocking mobile phones is a normal management behavior and does not violate relevant regulations. The school has installed fixed phones in each dormitory, and there are also magnetic card phones on campus. These tools can provide students with channels for external communication, without affecting students’ communication rights, nor the contact between parents and students.
No freedom is absolute, and there is no absolute freedom of communication. In fact, not allowing students to use mobile phones or bringing mobile phones into campus is a management method adopted by many schools, and it does not violate relevant education regulations. Properly regulate students' use of mobile phones, which is conducive to their learning and growth.
Protecting community airspace requires installing anti-drone jamming equipment
Jammer B. | 15.04.2024 0 0
In today's era, with the rapid development of drone technology, drones have been widely used in various fields, bringing great convenience to people's lives. However, the popularization of drone technology has also brought about a series of safety issues, especially in terms of community airspace security. The misuse and illegal flight of drones have posed a serious threat to people's daily lives. Therefore, it is particularly important to protect the safety of community airspace and install anti-drone interference equipment.
https://www.silencejammer.com/
In recent years, the turmoil in the international situation has made the issue of drone safety more prominent. In Russia, Ukraine, the Middle East, Southeast Asia and other places, drones have become an important role in conflicts and disputes. Drone abuse incidents occur frequently in these areas, posing great challenges to local security and stability. Drones may carry weapons for attack, or be used for reconnaissance and intelligence theft, posing a great threat to the safety of the community. Therefore, it is necessary for us to take practical and effective measures to prevent and respond to the misuse of drones.
Anti-drone jamming equipment is an effective technical means that can interfere with and control drones to protect the safety of community airspace. Anti-drone interference equipment emits electromagnetic waves of specific frequencies to interfere with the control system of the drone, causing it to lose control or force it to land. The application of this kind of equipment can effectively prevent the abuse of drones and maintain the safety and stability of the community.
In the research and development of anti-drone jamming equipment, the anti-drone power amplifier module is a crucial part. The power amplifier module is the core component of the device. It is responsible for converting the energy of the power supply into high-frequency electromagnetic wave energy and radiating it out. An excellent anti-UAV power amplifier module needs to have the characteristics of high efficiency, high reliability, and high stability to ensure the stability and reliability of the interference effect. Therefore, choosing a source manufacturer of anti-drone equipment with strong R&D capabilities and production experience is crucial to obtaining high-quality anti-drone jamming equipment.
The application of anti-drone jamming equipment not only has widespread demand domestically, but has also received increasing attention internationally. In the current international situation, countries are strengthening the research, development and application of drone technology, and at the same time they are also facing safety challenges caused by the misuse of drones. Therefore, the promotion and application of anti-drone jamming equipment is of great significance to maintaining the security and stability of the international community.
High-power remote control assembly transformed into jammer
Jammer B. | 13.04.2024 0 0
The cheap jamming device that can disable electronic car keys is actually two high-power remote controls. Li Tianliang, deputy general manager of after-sales service at Beijing Aojia Shimao Automobile Sales and Service Co., Ltd., said that during the factory, sales and after-sales process of cars, car jammers do not exist as independent detection equipment. “The jammer is essentially a radio transmitter. , it’s just that someone assembled it and used it for evil purposes.”
In the radio expert's studio, the working principle of the car jammer is clear at a glance under the measurement of professional radio instruments.
https://www.silencejammer.com/
Turn on the jammer, and the computer screen connected to the broadband receiver will immediately display a symmetrical columnar waterfall chart, shaped like a thick "big tree".
The expert pressed a car key button next to the jammer at the same time, and a "thin tree" immediately appeared on the edge of the "branches" to the right of the "thick tree". The shape of the "thin tree" is the same as that of the "thick tree", except that its "trunk" and "branches" are obviously one size smaller.
Experts explained that the "thick trees" and "thin trees" displayed on the screen are the real-time frequency waterfall charts of the jammer and the car key respectively. It can be judged from the shape and size of the waterfall chart that the frequency intensity of the jammer is significantly higher than that of an ordinary car key.
"It's like someone speaking loudly next to your ear. His voice is louder and other sounds are drowned out."
In response to the situation where the jammer "missed" and some high-end cars were damaged in previous field tests. Experts explain that in a specific frequency band, if the "thick tree" completely covers the "thin tree", it means complete blocking and successful interference; if the "thin tree" happens not to be within the trunk range of the "thick tree", it means If it is not completely blocked, the interference is likely to fail.
In-depth analysis of signal jammer prices: understand the price range of differe
Jammer B. | 11.04.2024 0 0
As a device used to shield or interfere with wireless signals, signal jammers play an important role in various situations, ranging from confidentiality requirements to preventing the abuse of communication equipment. However, different types of signal jammers differ in functionality and performance, so their prices will also vary. This article will take an in-depth look at the different types of signal jammer price ranges to help people better understand the market.
https://www.silencejammer.com/
1. Traditional handheld signal jammer
Traditional handheld signal jammers are usually relatively cheap, generally ranging from tens to hundreds of dollars. This type of signal jammer is usually small in size and simple to operate, and is suitable for personal use or signal shielding needs in small areas. However, because its features and performance are relatively limited, its price is also relatively low.
2. Professional grade signal jammer
Professional-grade signal jammers tend to be more expensive, generally ranging from a few hundred to a few thousand dollars, or more. This type of signal jammer usually has more powerful functions and performance, can cover a wider frequency range, has higher transmit power and more precise interference capabilities. These devices are often used in situations where efficient signal shielding is required, such as government agencies, military bases, security laboratories, etc.
3. Vehicle signal jammer
A vehicle signal jammer is a signal shielding device installed inside a vehicle to block the connection between the wireless communication equipment inside the vehicle and the external network. This type of equipment is usually more expensive, generally ranging from hundreds to thousands of dollars, depending on factors such as the functionality and performance of the equipment. Vehicle-mounted signal jammers have important applications in some specific occasions, such as prison vehicles, police vehicles, etc.
4. Custom signal jammer
Customized signal jammers are usually customized and manufactured by some professional communication equipment manufacturers or service providers according to customer needs. Their prices depend on the customer's specific needs and customization requirements, and may be higher than general standard products. These signal jammers are often more customizable and adaptable to better meet the specific needs of customers.
Different types of signal jammers have large differences in price, which mainly depend on their functions, performance, application scenarios, market competition and other factors. For ordinary consumers, choosing a suitable signal jammer not only needs to consider price factors, but also needs to comprehensively consider the performance and applicable scenarios of the device to ensure that it can meet their own needs.
Will the shielding effect of the signal shielding device be affected by the wall
Jammer B. | 10.04.2024 0 0
With the continuous development of wireless communication technology, people's demand for signal shielding technology is also getting higher and higher. As a common device, signal jammers are widely used to shield interference between electronic devices and prevent information leakage. However, some studies in recent years have shown that walls may affect the shielding effect of signal shielding devices. This discovery has attracted widespread attention from experts and researchers.
As technology continues to advance, we use various wireless devices more and more frequently. However, in some specific occasions or environments, we need to use signal blocking devices to shield the spread of wireless signals and prevent information leakage caused by wireless communication equipment. The signal jammer can effectively block wireless signals. However, due to the complex on-site environment during use, it may be necessary to use the signal jammer across a wall. So is it feasible to use the signal jammer across the wall? Will the shielding effect of the signal shielding device be affected by the wall?
https://www.silencejammer.com
First, we need to understand the principles of signal propagation. The propagation distance of wireless signals is closely related to the influence of frequency and antenna power, antenna direction, and obstacles. Wireless communication equipment generally works in the 700MHz to 5.8GHz frequency band, and the signal penetration capabilities of these frequency bands are weak. The signal jammer also emits signals between this signal frequency band to interfere with wireless communication equipment. So, when the signal shielding device encounters a wall, will it be affected by the wall? The answer is yes. Walls also have an impact on signal penetration. Generally speaking, walls are divided into solid walls and hollow walls. Solid walls have poor signal penetration capabilities, while hollow walls have relatively good signal penetration capabilities.
The wireless signal jammer blocks the signal received by the mobile phone from the base station. It will attenuate when it encounters obstacles such as walls. Walls are made of many materials: reinforced concrete, glass, wooden boards, iron sheets, etc. The composition complexity of the wall has different effects on the signal of the wireless signal jammer. For solid walls made of reinforced concrete, the attenuation after penetration is very large; if it is made of gypsum board, the attenuation is smaller; if it is made of glass or wood, there is basically no big attenuation. Walls made of reinforced concrete are the most difficult to penetrate for shielding, while glass is easier to penetrate for shielding. The thickness of the wall will also have a great impact on the wireless signal shielding device. The thicker the wall, the weaker its penetrability will be. In other words, the thinner the wall, the stronger the penetrability of the wireless signal shielding device.
So is there any way we can solve this problem? In fact, the greater the power of the wireless signal jammer, the stronger the penetration. Therefore, if there is a requirement for wall-penetrating shielding, you can choose a wireless signal jammer with higher power. The greater power can improve the signal jammer's wall-penetrating use effect and meet the requirements for using the jammer through the wall.
GPS signal jammer: the hidden technological undercurrent
Jammer B. | 09.04.2024 0 0
With the rapid development of technology, GPS signal jammers have gradually emerged as a controversial technology. This article will delve into the definition, working principle and impact of GPS signal jammers on society, aiming to fully understand the characteristics and potential risks of this technology.
A GPS signal jammer, also known as a GPS jammer, is a device designed to interfere with or block the normal functioning of a GPS receiver by emitting electromagnetic waves of specific frequencies. It can be used to prevent GPS devices from acquiring satellite signals, thereby rendering the positioning system ineffective.
https://www.silencejammer.com/
Application of GPS signal jammer
1. Military use
In some military operations, in order to prevent the enemy from using GPS for navigation and positioning, the military may use GPS signal jammers to create an environment where positioning cannot be performed and increase the confidentiality of military operations;
2. Anti-theft and privacy protection
Some vehicle anti-theft systems and situations with high privacy protection requirements may use GPS signal jammers to prevent the vehicle from being tracked or located, or to prevent the GPS navigation device from leaking location information;
3. Illegal purposes
However, some criminals may also use GPS signal jammers to carry out illegal activities, such as cheating in exams, evading supervision, and committing crimes. This raises concerns about misuse of the technology.
Social Impact and Laws and Regulations
1. Safety hazards
The misuse of GPS signal jammers may lead to safety hazards such as traffic accidents and navigation system failures, posing potential threats to society;
2. Ethical and regulatory issues
The misuse of technology has triggered a series of ethical and regulatory issues involving privacy, network security and other aspects. Countries have introduced relevant laws and regulations to regulate the legal use and abuse of GPS signal jammers.
Technological Progress and Countermeasures
1. Technological progress
With the continuous development of technology, some advanced GPS signal jammers may have stronger anti-interference capabilities, and some new positioning technologies are gradually being applied to slow down the impact of GPS signal jammers;
2. Countermeasures
In response to the abuse of GPS signal jammers, scientific research institutions and related industries are also developing a series of countermeasures, including improving the anti-interference ability of GPS receivers and strengthening regulatory supervision to ensure the normal and safe use of GPS technology.
As a technology, GPS signal jammer can play a positive role in some special occasions with its reasonable application. However, its misuse may pose a threat to social stability and personal privacy. By in-depth understanding of its working principle, application fields and social impact, we can better understand the dual nature of this technology, aiming to manage and use it more scientifically. In the future, society should strengthen supervision and the formulation of regulations to ensure that the use of GPS signal jammers is within the scope of legal compliance and does not harm public safety and social order.
Some applications of low-slow and small UAV countermeasures and characteristics
Jammer B. | 08.04.2024 0 0
1. Reconnaissance system
(1) Spectrum monitoring
Spectrum monitoring realizes the detection of intruding unknown aircraft and remote controllers by measuring the incoming wave direction of aircraft image transmission signals and the incoming wave direction of remote control signals in real time. It can conduct reconnaissance on aircraft command and control signals and digital transmission signals in the 0.4-6GHz broadband, obtain relevant information about command and data transmission signals, and generate corresponding interference patterns based on the characteristics of aircraft command and data transmission signals to guide jammers to implement interference. The handheld reconnaissance equipment can direct the aircraft control signal source within 200m according to the signal strength.
https://www.silencejammer.com/
(2) Three-coordinate phased array low-altitude surveillance radar
A fully phased array radar is used for network detection to detect, track and locate multiple batches of targets in a large area in real time. Mainly aimed at low-altitude (100 meters to 3000 meters), small (RCS = 0.01-10㎡), and slow (3km/h-400km/h) targets, a single radar can complete the detection of low-altitude flying targets in a near-field environment. Video tracking, jamming and induction, aircraft capture and aircraft strike provide precise positioning (azimuth, altitude, distance).
Photoelectric tracking
(3) Photoelectric tracking
Optoelectronic tracking has the characteristics of all-weather, fast speed, wide coverage, large visual range, and stable and clear images. It can discover, identify and confirm targets through 2 million day and night network cameras during the day and through high-performance uncooled infrared thermal imaging systems at night. .
2. Interference system
(1) Adaptive suppression jammer
The adaptive suppression jammer adopts ultra-wideband frequency jamming technology, which can not only jam and suppress aircraft command signals in three fixed frequency bands at 5Km: GPS/GLONASS, 2.4GWIFI frequency band, and 5.8GWIFI frequency band. The system processor can also communicate with the spectrum monitoring system. In combination, the relevant characteristics of the target signal are analyzed and the corresponding interference method is adaptively generated and the relevant information is written into the interference source, thereby achieving more effective interference.
(2) Deceptive jammer
Deceptive jammers send false GPS signals to the aircraft's control system to deceive and block the aircraft's satellite navigation components, thereby controlling the navigation system and inducing the aircraft to fly to the wrong location, thereby achieving the purpose of controlling black-flying aircraft.
3. Composition of low-altitude monitoring and countermeasures integrated platform
The aircraft monitoring and countermeasures system management software effectively integrates the functions of various modules and equipment on one map for management and use. These include map positioning module, video surveillance module, alarm module, linkage attack and equipment management module, etc. Among them, the map positioning module is used for spectrum detection, radar monitoring and positioning; the video module includes real-time video captured by ordinary telephoto lenses and infrared thermal imaging equipment; the alarm module integrates spectrum detection, radar monitoring and alarm; the linkage strike module integrates aircraft The use of equipment such as nets, interference equipment, GPS induction and microwave rejection are integrated; the equipment management module monitors the equipment status of each equipment.
Some applications of low-slow and small UAV countermeasures and characteristics
Jammer B. | 08.04.2024 0 0
1. Reconnaissance system
(1) Spectrum monitoring
Spectrum monitoring realizes the detection of intruding unknown aircraft and remote controllers by measuring the incoming wave direction of aircraft image transmission signals and the incoming wave direction of remote control signals in real time. It can conduct reconnaissance on aircraft command and control signals and digital transmission signals in the 0.4-6GHz broadband, obtain relevant information about command and data transmission signals, and generate corresponding interference patterns based on the characteristics of aircraft command and data transmission signals to guide jammers to implement interference. The handheld reconnaissance equipment can direct the aircraft control signal source within 200m according to the signal strength.
https://www.silencejammer.com/
(2) Three-coordinate phased array low-altitude surveillance radar
A fully phased array radar is used for network detection to detect, track and locate multiple batches of targets in a large area in real time. Mainly aimed at low-altitude (100 meters to 3000 meters), small (RCS = 0.01-10㎡), and slow (3km/h-400km/h) targets, a single radar can complete the detection of low-altitude flying targets in a near-field environment. Video tracking, jamming and induction, aircraft capture and aircraft strike provide precise positioning (azimuth, altitude, distance).
Photoelectric tracking
(3) Photoelectric tracking
Optoelectronic tracking has the characteristics of all-weather, fast speed, wide coverage, large visual range, and stable and clear images. It can discover, identify and confirm targets through 2 million day and night network cameras during the day and through high-performance uncooled infrared thermal imaging systems at night. .
2. Interference system
(1) Adaptive suppression jammer
The adaptive suppression jammer adopts ultra-wideband frequency jamming technology, which can not only jam and suppress aircraft command signals in three fixed frequency bands at 5Km: GPS/GLONASS, 2.4GWIFI frequency band, and 5.8GWIFI frequency band. The system processor can also communicate with the spectrum monitoring system. In combination, the relevant characteristics of the target signal are analyzed and the corresponding interference method is adaptively generated and the relevant information is written into the interference source, thereby achieving more effective interference.
(2) Deceptive jammer
Deceptive jammers send false GPS signals to the aircraft's control system to deceive and block the aircraft's satellite navigation components, thereby controlling the navigation system and inducing the aircraft to fly to the wrong location, thereby achieving the purpose of controlling black-flying aircraft.
3. Composition of low-altitude monitoring and countermeasures integrated platform
The aircraft monitoring and countermeasures system management software effectively integrates the functions of various modules and equipment on one map for management and use. These include map positioning module, video surveillance module, alarm module, linkage attack and equipment management module, etc. Among them, the map positioning module is used for spectrum detection, radar monitoring and positioning; the video module includes real-time video captured by ordinary telephoto lenses and infrared thermal imaging equipment; the alarm module integrates spectrum detection, radar monitoring and alarm; the linkage strike module integrates aircraft The use of equipment such as nets, interference equipment, GPS induction and microwave rejection are integrated; the equipment management module monitors the equipment status of each equipment.
Some applications of low-slow and small UAV countermeasures and characteristics
Jammer B. | 08.04.2024 0 0
1. Reconnaissance system
(1) Spectrum monitoring
Spectrum monitoring realizes the detection of intruding unknown aircraft and remote controllers by measuring the incoming wave direction of aircraft image transmission signals and the incoming wave direction of remote control signals in real time. It can conduct reconnaissance on aircraft command and control signals and digital transmission signals in the 0.4-6GHz broadband, obtain relevant information about command and data transmission signals, and generate corresponding interference patterns based on the characteristics of aircraft command and data transmission signals to guide jammers to implement interference. The handheld reconnaissance equipment can direct the aircraft control signal source within 200m according to the signal strength.
https://www.silencejammer.com/
(2) Three-coordinate phased array low-altitude surveillance radar
A fully phased array radar is used for network detection to detect, track and locate multiple batches of targets in a large area in real time. Mainly aimed at low-altitude (100 meters to 3000 meters), small (RCS = 0.01-10㎡), and slow (3km/h-400km/h) targets, a single radar can complete the detection of low-altitude flying targets in a near-field environment. Video tracking, jamming and induction, aircraft capture and aircraft strike provide precise positioning (azimuth, altitude, distance).
Photoelectric tracking
(3) Photoelectric tracking
Optoelectronic tracking has the characteristics of all-weather, fast speed, wide coverage, large visual range, and stable and clear images. It can discover, identify and confirm targets through 2 million day and night network cameras during the day and through high-performance uncooled infrared thermal imaging systems at night. .
2. Interference system
(1) Adaptive suppression jammer
The adaptive suppression jammer adopts ultra-wideband frequency jamming technology, which can not only jam and suppress aircraft command signals in three fixed frequency bands at 5Km: GPS/GLONASS, 2.4GWIFI frequency band, and 5.8GWIFI frequency band. The system processor can also communicate with the spectrum monitoring system. In combination, the relevant characteristics of the target signal are analyzed and the corresponding interference method is adaptively generated and the relevant information is written into the interference source, thereby achieving more effective interference.
(2) Deceptive jammer
Deceptive jammers send false GPS signals to the aircraft's control system to deceive and block the aircraft's satellite navigation components, thereby controlling the navigation system and inducing the aircraft to fly to the wrong location, thereby achieving the purpose of controlling black-flying aircraft.
3. Composition of low-altitude monitoring and countermeasures integrated platform
The aircraft monitoring and countermeasures system management software effectively integrates the functions of various modules and equipment on one map for management and use. These include map positioning module, video surveillance module, alarm module, linkage attack and equipment management module, etc. Among them, the map positioning module is used for spectrum detection, radar monitoring and positioning; the video module includes real-time video captured by ordinary telephoto lenses and infrared thermal imaging equipment; the alarm module integrates spectrum detection, radar monitoring and alarm; the linkage strike module integrates aircraft The use of equipment such as nets, interference equipment, GPS induction and microwave rejection are integrated; the equipment management module monitors the equipment status of each equipment.
Some applications of low-slow and small UAV countermeasures and characteristics
Jammer B. | 08.04.2024 0 0
1. Reconnaissance system
(1) Spectrum monitoring
Spectrum monitoring realizes the detection of intruding unknown aircraft and remote controllers by measuring the incoming wave direction of aircraft image transmission signals and the incoming wave direction of remote control signals in real time. It can conduct reconnaissance on aircraft command and control signals and digital transmission signals in the 0.4-6GHz broadband, obtain relevant information about command and data transmission signals, and generate corresponding interference patterns based on the characteristics of aircraft command and data transmission signals to guide jammers to implement interference. The handheld reconnaissance equipment can direct the aircraft control signal source within 200m according to the signal strength.
https://www.silencejammer.com/
(2) Three-coordinate phased array low-altitude surveillance radar
A fully phased array radar is used for network detection to detect, track and locate multiple batches of targets in a large area in real time. Mainly aimed at low-altitude (100 meters to 3000 meters), small (RCS = 0.01-10㎡), and slow (3km/h-400km/h) targets, a single radar can complete the detection of low-altitude flying targets in a near-field environment. Video tracking, jamming and induction, aircraft capture and aircraft strike provide precise positioning (azimuth, altitude, distance).
Photoelectric tracking
(3) Photoelectric tracking
Optoelectronic tracking has the characteristics of all-weather, fast speed, wide coverage, large visual range, and stable and clear images. It can discover, identify and confirm targets through 2 million day and night network cameras during the day and through high-performance uncooled infrared thermal imaging systems at night. .
2. Interference system
(1) Adaptive suppression jammer
The adaptive suppression jammer adopts ultra-wideband frequency jamming technology, which can not only jam and suppress aircraft command signals in three fixed frequency bands at 5Km: GPS/GLONASS, 2.4GWIFI frequency band, and 5.8GWIFI frequency band. The system processor can also communicate with the spectrum monitoring system. In combination, the relevant characteristics of the target signal are analyzed and the corresponding interference method is adaptively generated and the relevant information is written into the interference source, thereby achieving more effective interference.
(2) Deceptive jammer
Deceptive jammers send false GPS signals to the aircraft's control system to deceive and block the aircraft's satellite navigation components, thereby controlling the navigation system and inducing the aircraft to fly to the wrong location, thereby achieving the purpose of controlling black-flying aircraft.
3. Composition of low-altitude monitoring and countermeasures integrated platform
The aircraft monitoring and countermeasures system management software effectively integrates the functions of various modules and equipment on one map for management and use. These include map positioning module, video surveillance module, alarm module, linkage attack and equipment management module, etc. Among them, the map positioning module is used for spectrum detection, radar monitoring and positioning; the video module includes real-time video captured by ordinary telephoto lenses and infrared thermal imaging equipment; the alarm module integrates spectrum detection, radar monitoring and alarm; the linkage strike module integrates aircraft The use of equipment such as nets, interference equipment, GPS induction and microwave rejection are integrated; the equipment management module monitors the equipment status of each equipment.
Some applications of low-slow and small UAV countermeasures and characteristics
Jammer B. | 08.04.2024 0 0
1. Reconnaissance system
(1) Spectrum monitoring
Spectrum monitoring realizes the detection of intruding unknown aircraft and remote controllers by measuring the incoming wave direction of aircraft image transmission signals and the incoming wave direction of remote control signals in real time. It can conduct reconnaissance on aircraft command and control signals and digital transmission signals in the 0.4-6GHz broadband, obtain relevant information about command and data transmission signals, and generate corresponding interference patterns based on the characteristics of aircraft command and data transmission signals to guide jammers to implement interference. The handheld reconnaissance equipment can direct the aircraft control signal source within 200m according to the signal strength.
https://www.silencejammer.com/
(2) Three-coordinate phased array low-altitude surveillance radar
A fully phased array radar is used for network detection to detect, track and locate multiple batches of targets in a large area in real time. Mainly aimed at low-altitude (100 meters to 3000 meters), small (RCS = 0.01-10㎡), and slow (3km/h-400km/h) targets, a single radar can complete the detection of low-altitude flying targets in a near-field environment. Video tracking, jamming and induction, aircraft capture and aircraft strike provide precise positioning (azimuth, altitude, distance).
Photoelectric tracking
(3) Photoelectric tracking
Optoelectronic tracking has the characteristics of all-weather, fast speed, wide coverage, large visual range, and stable and clear images. It can discover, identify and confirm targets through 2 million day and night network cameras during the day and through high-performance uncooled infrared thermal imaging systems at night. .
2. Interference system
(1) Adaptive suppression jammer
The adaptive suppression jammer adopts ultra-wideband frequency jamming technology, which can not only jam and suppress aircraft command signals in three fixed frequency bands at 5Km: GPS/GLONASS, 2.4GWIFI frequency band, and 5.8GWIFI frequency band. The system processor can also communicate with the spectrum monitoring system. In combination, the relevant characteristics of the target signal are analyzed and the corresponding interference method is adaptively generated and the relevant information is written into the interference source, thereby achieving more effective interference.
(2) Deceptive jammer
Deceptive jammers send false GPS signals to the aircraft's control system to deceive and block the aircraft's satellite navigation components, thereby controlling the navigation system and inducing the aircraft to fly to the wrong location, thereby achieving the purpose of controlling black-flying aircraft.
3. Composition of low-altitude monitoring and countermeasures integrated platform
The aircraft monitoring and countermeasures system management software effectively integrates the functions of various modules and equipment on one map for management and use. These include map positioning module, video surveillance module, alarm module, linkage attack and equipment management module, etc. Among them, the map positioning module is used for spectrum detection, radar monitoring and positioning; the video module includes real-time video captured by ordinary telephoto lenses and infrared thermal imaging equipment; the alarm module integrates spectrum detection, radar monitoring and alarm; the linkage strike module integrates aircraft The use of equipment such as nets, interference equipment, GPS induction and microwave rejection are integrated; the equipment management module monitors the equipment status of each equipment.
What are the interference effects of improving mobile phone jammers on 5G?
Jammer B. | 05.04.2024 0 0
With the gradual popularization and application of 5G technology, people's attention to communication security and privacy protection is also increasing. As a preventive measure, mobile phone jammers have attracted much attention for their interference effect on 5G signals. In this context, people hope to understand how to improve the interference effect of mobile phone jammers on 5G to better protect personal privacy and communication security. This article will explore this issue and cite relevant news literature to provide readers with an in-depth understanding. https://www.silencejammer.com/
Development and application of 5G technology
First, we need to understand the development and application of 5G technology. 5G is the fifth generation of mobile communication technology. It has higher transmission speed, lower latency and larger capacity, providing people with a faster, more stable and efficient communication experience. However, with the popularization of 5G technology, it has also brought about some security and privacy issues, such as being eavesdropped and tracked.
How cell phone jammers work
Next, let’s understand how cell phone jammers work. A mobile phone jammer is a device that can interfere with mobile communication signals. It emits radio frequency signals of a specific frequency and phase to offset the mobile phone signals, thereby achieving the interference effect. In theory, mobile phone jammers can interfere with signal transmission between mobile phones and communication base stations, thereby preventing communication content from being eavesdropped or tracked.
Improve the interference effect of mobile phone jammers on 5G
Based on the characteristics and transmission methods of 5G technology, there are some methods to improve the interference effect of mobile phone jammers on 5G:
Optimize frequency and power adjustment: 5G technology uses higher frequency communication bands, so it is necessary to optimize the frequency range of 5G and adjust the frequency and power of interference signals to enhance the interference effect on 5G signals.
Strengthen the interference range coverage: Optimize the antenna system design, expand the interference range coverage, and ensure that all 5G signals in the target area are effectively interfered.
Improve anti-interference ability: Use advanced anti-interference technology to improve the stability and anti-interference ability of interference signals to withstand various complex environments and signal interference.
Technical challenges and solutions
However, there are still some technical challenges to improve the interference effect of mobile phone jammers on 5G, such as the continuous development and updating of 5G technology and the particularity of the 5G frequency band. Therefore, the technology of mobile phone jammers needs to be constantly upgraded and improved to cope with new communication technologies and equipment. In addition, strengthening supervision and legal regulations and cracking down on the illegal use of mobile phone jammers are also important measures to ensure communication security and social stability.
5 Conclusion
To sum up, improving the interference effect of mobile phone jammers on 5G requires a series of technical means and measures, including optimizing frequency and power adjustment, strengthening interference range coverage, and improving anti-interference capabilities. Although facing some technical challenges, with the continuous development and improvement of technology, mobile phone jammers are expected to play a more important role in preventing 5G communication security issues. In the future, we can expect more innovation and progress to provide more effective solutions for protecting communication security and personal privacy.
Why is there still signal on my phone after turning on the cell phone signal jam
Jammer B. | 03.04.2024 0 0
In today's highly information-based society, with the continuous development of communication technology, people have higher and higher demands for communication security and privacy protection. Cell phone jammers are widely used as a countermeasure to prevent communications from being eavesdropped or tracked. However, sometimes people find that even if the cell phone signal jammer is turned on, the phone can still receive the signal. What is the reason behind this phenomenon?
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First, let’s understand how a cell phone signal jammer works. A mobile phone signal jammer is a device that can block mobile phone signals. It emits radio frequency signals of a specific frequency and phase to offset the mobile phone signals, thereby achieving a shielding effect. In theory, a mobile phone signal jammer can block the signal transmission between the mobile phone and the communication base station, making the mobile phone unable to communicate normally.
In fact, the mobile phone signal jammer is not an absolutely effective device, and it also has certain limitations and shortcomings. First of all, the mobile phone signal jammer is mainly aimed at the signal transmission between the mobile phone and the communication base station, and has no direct interference effect on other signals (such as Wi-Fi, Bluetooth, etc.). Secondly, the interference range and interference effect of mobile phone signal jammers are affected by environmental and technical factors, and cannot fully cover all communication equipment and scenarios. Therefore, even if the mobile phone signal jammer is turned on, the mobile phone may still receive other signals, causing the signal to still exist.
In the process of protecting communication security and privacy, people should take multiple precautions to improve the effectiveness of security. In addition to using mobile phone signal blockers, you can also combine other measures, such as regularly updating mobile phone systems and applications, setting privacy permissions, and avoiding turning on positioning functions in public places, to strengthen the protection of communication security and privacy.
Diversified anti-drone means in modern warfare
Jammer B. | 02.04.2024 0 0
In view of the threats posed by drones on the battlefield, countries have launched countermeasures in recent years. The US military lists drones as one of the most destructive aerial threats and has formulated a "Counter-UAV System Strategy" to deal with them. The Russian army has listed drone defense operations as an important task and is practicing anti-drone combat technology on the Syrian battlefield. The UK has made combating swarm drones a top priority and is exploring combat methods using radio frequency suppressors to interfere with swarm drone links.
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Generally speaking, the current main anti-UAV means include electronic jamming, artillery and missile hard kill, high-energy laser weapons and high-power microwave weapon interception.
Among them, electronic interference blocking is the most effective countermeasure. Drones rely on communication links to operate, and communication links are most afraid of electromagnetic interference. By transmitting high-power radio frequency signals to the drone, the control program can be disrupted, making it unable to perform its mission or crash the aircraft. The lightweight air defense integrated system equipped by the U.S. Marine Corps is an electronic jamming system for drones. The system consists of a command vehicle and a jamming vehicle equipped with tactical air surveillance radar, small electro-optical/infrared cameras, radio frequency detection systems and radio frequency jammers, which can detect, track, identify drones and use electronic attacks Means to make an emergency landing. In July 2019, the lightweight air defense integrated system mounted on the USS Boxer amphibious assault ship successfully made an emergency landing of an Iranian drone. Iran also used similar means to take over a US military Sentinel stealth drone.
The interception fire network composed of traditional anti-aircraft artillery and missiles is currently one of the main means to deal with drone operations. The Russian "Tor" M1 field air defense system adopts a vertical launch method, and the missile responds quickly. It has shot down many types of drones, including the Turkish TB-2. However, the Russian-made Pantsir S1 missile-cannon integrated air defense system, which is also a "sharp weapon" for close-range air defense, was destroyed by drones in actual combat.
When dealing with "low, slow and small" drones, laser beams have demonstrated the advantages of speed, flexibility, precision, and high cost-effectiveness. For example, the 50-kilowatt high-energy laser air defense system launched by Germany's Rheinmetall is equipped with three laser beam emitters and uses beam folding technology to increase power and can effectively deal with various aerial targets including drones.
High-energy microwave weapons can deal with drone swarms. High-energy microwave weapons attack UAV electronic systems through high-power microwave beams with directional radiation. It is a new concept weapon that integrates soft/hard killing capabilities. Compared with high-energy laser weapons, microwave weapons have a longer range, are less affected by weather, and have more convenient fire control, making them suitable for dealing with drone swarm attacks. The solid-state microwave weapon system being developed by the US military has shot down dozens of drones during tests.
Analysis of GPS signal jammer: a powerful tool to protect privacy and security
Jammer B. | 01.04.2024 0 0
When purchasing and using a mortgaged car, it is best to equip it with a GPS jammer within a certain period of time. Especially for friends who are collecting cars from car dealers or buying mortgaged cars, that is to say, as soon as you receive the car, you can turn on the GPS jammer and put one in the car and one in the trunk! Turning on the jammer can ensure that you have no worries during the time when you pick up the car and return. However, the jammer cannot be turned on 24 hours a day, so after arriving safely at your own site, you must find professional personnel to check the GPS yourself. At the same time, install a GPS positioning device and a secret lock, change the key code, and other security measures to prevent mishaps.
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Meet the GPS Jammer
GPS jammers (jammers) can effectively prevent being tracked by GPS satellites, effectively interfere with GPS satellite signals, and protect your whereabouts privacy and information confidentiality.
Disadvantages of GPS locator
It has to be said that GPS jammers also have disadvantages for users. The signal jammer can only be turned on temporarily and cannot be turned on forever. As long as he turns off the jammer, the GPS locator will have a signal again. Car owners can quickly find their stolen vehicles based on
location information.
In addition to signal jammers, some may say that they will use signal detectors to find and destroy the GPS locator. Yes, this is true, but it only works for some GPS devices. If the GPS locator is dormant most of the time, the signal detector will have no way to detect it! why?
For example, some ultra-long-standby GPS locators only wake up once a day. After waking up, they immediately transmit the car's positioning information back to the owner's mobile phone platform and then go into sleep state again. In the sleep state, they have no signal at all. , it is absolutely impossible for a car thief to detect it! In addition, it is wireless and requires no installation. There is no wiring on the surface of the device and it can be placed anywhere in the car (as long as it is not placed in a place where the signal is blocked). It is very concealed and safe.
How to use GPS jammer
The GPS jammer can indeed block the GPS signal, but it has the disadvantage that it will block all signals in the car! In other words, it is impossible for a car thief to use mobile phones and other communication devices around the car. If he cannot find and destroy the GPS device, then he can only turn on the jammer forever, otherwise, sooner or later, his whereabouts will be exposed. So how to use a GPS jammer needs to do the following:
1. You can use a GPS jammer during the pick-up and return journey, so you don’t have to be afraid even if there are tricks.
2. When you return to your own place, don’t shut it down yet. Go to an auto repair shop for major disassembly first. Make sure it is completely removed and then close it.
3. For safety reasons, a car can use the GPS jammer continuously for more than half a year. And ensure that the GPS jammer can work normally 24 hours a day.
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