Meet the new anti-drone weapon

Recently, the Russian ZALA AERO Group demonstrated a new anti-UAV weapon. The anti-drone gun REX-2 is a new version of the well-known drone jammer weapon REX-1.

According to the company’s website, REX-1 is a compact non-lethal weapon that can suppress SNS signals (GPS/GLONASS) and control channels between the drone and its operator within a range of 2 kilometers.

waterproof drone signal blocker portable

The new version is lighter: the size is reduced and the weight is now 3 kg. The basic configuration includes three suppression modules (2.4 GHz, 5,8 GHz, SNS). The SNS suppression module is built into the REX-2 body. There is also a battery indicator, which makes it easier to control battery power.

The suppression frequency can be adjusted according to customer requirements. Video recorder, strobe, laser and aiming device are available as options.

REX-2 has completed laboratory tests and is approved for operator safety. The electromagnetic radiation rate is within the allowable range.

Application of military jammers in various fields

The role of drones in interfering with war

The jammer usually causes the drone to perform a vertical controlled landing or return to its starting point-the default action for most drones to lose communication-“to assist in the investigation to determine the pilot,” the company said.

It shows the existence of Mi-8MTPR-1 helicopters in Crimea, equipped with Rychag-AV jamming stations, making these aircraft powerful weapons for electronic warfare operations. One of the main ways Russia adopts these systems is to deal with air defense systems and complexes by reducing the mute of its radio signals and the efficiency of UAV jammers. The results of a survey conducted by Ukraine in March this year showed that in 2016, Russia deployed such helicopters on the territory of SMD and the Western Military District (WMD).

The radar jammer forces the drone to land or return to the drone operator immediately, which means it can protect personnel and infrastructure assets from drone attacks.

The weapons being developed or the arsenals of China, Russia and the United States are undergoing various space arms races. Space weapons include satellite jammers, lasers and high-power microwave gun systems.

Experts say that the biggest threats seen today are non-kinetic threats, such as jamming satellite-based capabilities such as GPS and communications. And the threat is not limited to aerospace countries, because satellite jamming technology is relatively cheap.

gps car signal jammer

North Korea has used ground gps signal jammer in the past to affect military and civilian aircraft and ships. Harrison said there is evidence that insurgents in Afghanistan and Iraq also used interference.

Russian media claimed that the technology developed by the Russian military can neutralize opponents’ aircraft, ships and missiles within a radius of 5,000 kilometers. Vesti News first reported on April 14 that a Russian fighter plane had successfully tested the electronic jamming device on a US warship, the Black Sea destroyer Donald Cook.

Anti-UAV Technology Development Prospect and Impact Analysis

With the rapid development of military and civilian UAV technology, especially the successful development of reconnaissance/attack integrated UAV, the development of the “swarm” attack mode, the efficiency and cost-effectiveness of using traditional missiles and shells against UAVs The problem is getting more and more prominent. At present, all countries are stepping up the launch of strategies for UAV defense and promoting the rapid development of anti-UAV technology and equipment. Compared with missiles, the use of electromagnetic interference and lasers to counter unmanned aerial vehicles has the advantages of speed, flexibility, and high cost-effectiveness, and has attracted the attention of various countries. The successful development and testing of a batch of anti-UAV equipment in the United States and Europe has provided efficient and low-cost measures to defend against possible future drone threats.

Drone Jammer Interception System

In recent years, unmanned aerial vehicle technology has spread rapidly and widely, and a large number of remote-controlled helicopters and multi-rotor aircraft that are easy to control have appeared. Unexpected incidents related to unmanned aerial vehicles have frequently occurred, posing challenges to security and public order management. In the future, drone jammer technology will play an important role in the security field. In addition, the anti-UAV system is an emerging equipment that will help promote the development of technologies in the fields of microsystems, electromagnetic spectrum, and directed energy.

Why do schools use mobile phone jammers?

We used to be students in the school. We know that the school has a box similar to the size of a speaker. This is what we call a mobile phone jammer. Why do schools install mobile phone jammers? The answer is obvious: mobile phone signal jammers will block mobile phone signals and prevent mobile phone use.

The main reason for the installation of mobile phone shielding devices in school equipment is the increase in the number of students using mobile phones. Almost every student has a smartphone. They cannot control the use of mobile phones well, whether it is in class or during class time. Part of the time is spent on mobile phones. What do they use mobile phones for? Many teachers find that students now mainly use mobile phones to play popular games. Games have become an important part of their lives. Many topics they talk about in daily life are also related to games.

cheap portable wifi signal jammer

Students use mobile phones in many ways, the main purposes are different, but almost all have nothing to do with learning. The way of learning is very bad. The influence of mobile phones occupies most of their time. They spend very little time on study and rest, which not only affects their studies, but is detrimental to their bodies and growth. In addition, the school knows that the use of mobile phones by students will greatly affect the various ranking factors of the school and the construction of school style, which has a very unfavorable effect on the development of the school.

There are several reasons for the installation of mobile jammers in schools, but the main purpose is to block students’ mobile phone signals and prohibit students from using mobile phones in schools.

First of all, the school uses mobile phone jammers for the academic considerations of students. Students are the backbone of the country’s future, and the country’s development cannot be separated from generations of students. Therefore, in the student days, mobile phones cannot be destroyed by a generation of talents. The national key qualification examination adopts mobile phone jammer.

Secondly, the use of mobile phones by students not only affects their own learning, but also affects their health. They also affected the school’s ethos and its development.

Third, schools also show a responsible attitude. Schools are places to learn, to educate and educate people, and schools to cultivate talents. The vast majority of parents send their children to school so that their children can learn more and become people who will contribute to the country and society in the future. Using a mobile phone signal blocker can prevent students from using mobile phones and spend more time studying and resting so that they can grow up healthily.

Finally, mobile phone jammers used in schools are mainly purchased online, and school staff will select interference devices suitable for installation in the classroom according to the scope of use of the school. As you can see, the shielding equipment used in ordinary schools is waterproof. It can be used not only in schools, but also in prisons or theaters, cinemas, etc. Mainly designed for larger situations, with powerful power, interference radius of up to 100 meters, all mobile phones can interfere with frequency, can also block wireless WiFi and Bluetooth signals, built-in antenna, and easy to use, just turn on the power, high temperature , Can work for a long time, is an important device that prohibits the use of mobile phones.

Cheap GPS jammers pose a major threat to drones

Jammers that can be bought for as little as $ 50 threaten commercial drones, but options exist.

With the rotors buzzing and the airframes racing through the air, drones can be very dangerous if flights don’t go as planned. Much has been gnawed about the FAA’s measured approach to implementing commercial drone guidelines, but the fact is there are real dangers, even from bad actors using inexpensive GPS jammer.

phone signal jammer

GPS signal jamming technology is evolving, decreasing in size and cost. These days jammers can be bought online for as little as $ 50. Jamming has long been a threat to military assets and is becoming a commercial problem today as commercial drone shipments become a reality and attacks become ubiquitous around the world. This threat now affects trade, law enforcement, and defense drones on critical missions.

During a choreographed light show in Hong Kong in 2018, 46 drones fell from the sky due to a jamming device. The resulting property damage and loss of hardware is estimated to cost an estimated HK $ 1 million. Almost all drones have security protocols that can be used to send them home or to a safe landing site in the event of a disruption. However, these functions were found to be ineffective at the Hong Kong show.

“These are professional-grade drones already built with technology that will guide them back to the launch site,” Anthony Lau Chun-hon, director of the events committee, told the South China Morning Post. “But the signals were so strong that many of them just fell out of thin air.”

Drones and their services are decidedly dependent on GPS signals. Although the drone may have backup methods (INS / OPS), GPS references are still required for positioning, navigation and stabilization. GPS attacks are therefore the easiest way to shut down a drone and potentially cause harm to life and property.

The good news is that solutions for drones are arriving with commercial quality and coming straight from the defense sector. One comes from a company called infiniDome, which makes a device called a GPSdome that is built into a drone’s GNSS receivers and uses a unique interference filter system that combines the patterns of two omnidirectional antennas. GPSdome analyzes the interference signal in real time and feeds its properties into infiniDome’s proprietary algorithm to filter and reject attacking RF interference, so that the UAS continues to rely on GPS signals during a jamming attack. If an interference signal is detected, the GPSdome notifies the operator of possible signal interference.

Easy Aerial, a leading provider of autonomous, drone-based surveillance solutions for commercial, government and defense applications, recently added GPSdome to its range of autonomous unmanned aerial systems for military use.

“We chose GPSdome because it was a proven solution that was a perfect fit for the various missions our customers routinely fly in some of the most inhospitable and hostile environments in the world,” said Ido Gur, Co-Founder and CEO of Easy Aerial. “While our systems have multiple redundancies on board, GPS signals for maintaining position, navigation and timing accuracy are critical to ensure uninterrupted operation.”

This type of lightweight, small form factor, low power shielding technology is a critical step towards widespread adoption of commercial drones. Other companies like Sepentrio also take GPS interference in drone applications with integrated sensor solutions seriously.

It is certain that the problem of GPS interference and spoofing will receive more attention in the coming days. Fortunately, developers seem to be beginning to see tools that they can use to counter the growing threat.

Overview of wireless signal shielding principle of signal jammer

Let’s take a look at the overview of the principle of wireless signal shielding of signal jammers.

The working principle of mobile communication is that within a certain frequency range, wireless devices (mobile phones, etc.) communicate with the base station through radio waves, and complete data and sound transmission with a certain baud rate and modulation method. When the mobile phone communicates, it communicates with the base station through the uplink frequency, and then transfers the signal to the mobile service switching center to realize the call. In the standby state, the mobile phone communicates with the base station through the broadcast control channel. Once there is a call demand, it will be allocated to the mobile phone service channel according to the specific conditions of the channel near the terminal through the request, so that the mobile phone can jump to the service channel to realize the call and data transmission . At the same time, wireless communication must ensure a sufficient signal-to-noise ratio to effectively receive and complete communication.

desktop signal blocker

According to the above working principle, the cell phone signal jammer is generally composed of power supply, electronic scanning control unit, segmented radio frequency module unit, amplifier unit, transmitting antenna unit and other parts. The scanning signal generated by the signal generator passes the inverter, enters the oscillator and modulates it to the mobile communication working frequency band, and then is amplified by the power amplifier and the voltage regulator tube controls the power. The amplified frequency sweep signal is transmitted into the air in the form of radio waves. Because the frequency sweep signal forms garbled interference in the message signal received by the mobile phone (increasing the proportion of noise and noise signals to the device threshold), the mobile phone cannot receive the normal data sent by the base station, so that the mobile phone cannot establish a normal connection with the base station, thereby causing the mobile phone to disconnect Base station communication network. The mobile phone exhibits the phenomenon of no signal and no service system in the search network, which achieves the blocking effect. The mobile phone signal jammers produced by our company can achieve super high shielding effect, safe and simple.

The interference power of the jammer is fixed, and the shielding radius of the unblocked space is determined by the path attenuation and the signal level of the receiving base station. To realize interference from mobile phone signal jammers to mobile networks, it is necessary to ensure that the signal field emitted by the jammer is stronger than that of the mobile signal in the interference area. The closer the interference location is to the base station, the stronger the field strength and the smaller the effective interference area. , The farther the interference location is from the base station, the weaker the field strength and the larger the effective interference area.

It can be seen that within a certain transmit power, the interference range depends on the field strength in the interference area. No matter how powerful the jammer is, as long as the transmit power is a fixed value, as the distance increases, the interference signal strength will gradually attenuate and lose Interference ability. The following table shows the comparison table of distance and path attenuation. Then the output channel power of the jammer, the base station signal level, and the coverage line gain can determine the theoretical coverage radius with reference value.

Can the mobile phone signal jammer interfere with the base station’s signal?

Cell phone jammers are familiar to everyone, but everyone who has taken a large-scale exam has seen them and put them at the entrance of the exam room. This is not a malicious blocking signal. On the contrary, this is to maintain fairness and provide a fair environment for candidates. However, most of the time, some people doubt whether it will affect the signal radiation of the base station, so that there is no signal in an area.

With the progress of society and the development of high technology, people’s standards are getting higher and higher. Nowadays, mobile phones have become a habit of adults and children. For elementary and middle school students, it is more important to influence what they say. Playing with mobile phones for a long time may affect their eyesight, and more seriously, neglect their studies.

Since the advent of cell phone signal jammer, they have been trusted by examination rooms, schools, prisons and other units. In fact, mobile phone signal jammers are no longer a new thing abroad, and have begun to be sold in the domestic market in recent years. The cell phone signal blocker only interferes with lower cell phone signals, so it will not affect mobile base stations and other electronic devices. Now many elementary and middle school students are holding mobile phones one by one, some are addicted to games, some are addicted to novels, etc. It is even more dangerous for school exams. Baidu has all the answers. If everyone used their mobile phones to plagiarize during the exam, it would violate the purpose and significance of the exam!

Desktop high-power electronic jammer

In the face of mobile phone signal shielding, we should treat it rationally and scientifically. The working principle of the mobile phone signal blocker is to send out a specific signal to wake up, block or interfere with the signal between the mobile phone and the base station, so that the mobile phone has no signal or cannot find the network service, and the mobile phone will send and receive text messages. Unable to recognize the original text message.

In fact, signal jammers generally do not affect the signal of the base station, so there is no need to worry, and no one will consider interfering with other people’s signals.

The mobile phone jammer scans from the low end of the forward channel to the high end at a certain speed during the working process. This scanning speed can cause garbled interference in the message signal received by the mobile phone, causing the mobile phone to fail to detect the normal microwave signal data sent from the base station. In a certain range, the mobile phone cannot be connected to the base station, and the mobile phone appears as a search network, no signal, no service system, etc., and thus cannot be used. The purpose of disabling the mobile phone is achieved. Its operating frequency is: 869~94MHz; 825~ 960MHz; 1805~1880MHz and 1900~l990MHz, etc. The operating frequency bands are CDMA800, GSM900, DCS1800, PCS1900. When the mobile phone leaves the range of the jammer, it can be fully restored to normal use. The electrical signal emitted by the mobile phone jammer is undoubtedly an electromagnetic signal, but this kind of jammer will never have any equipment to communicate with it, and it will never form a sudden change signal. In other words, this signal will always be in a relatively static state. , It will not interfere with other electrical equipment, and it is harmless to the human body.

Cell phone jammer blocks radio waves in train

If you know there are tracking devices, do you think you will protect yourself? This is indeed necessary. When I was searching the internet I knew of a device called a WiFi jammer. You can see the cell phone signal tracking is in use. The jammer avoids catching up. Our website will make the best choice for you. For some people, it is necessary to use a signal jammer in a fixed location. If you have high requirements for interference distance, you can choose a fixed jammer.

When an external signal is required, there is a radio jammer. There is no doubt that if you have a signal breaker when you are outside, you should use a portable signal blocker. You can read more about signal jammers for cell phones. GPS interference can help you accomplish a lot of work and life. You will see that this device is powerful. Can block 5 CDMA GSM DCS PCS 4G cell phone signals.

22 Antennas all Signal Jammers

Jammer Telephone and radio waves. What are radio waves? I don’t have many. Radio waves are electromagnetic waves, which are electrical waves that travel through space. Radio waves of various frequencies are used in various places in our life. Cell phones can receive signals using radio waves. There are multiple deterrents to the radio frequency used on the phone. The function is also different. Effective when used correctly. Bring convenience to our lives.

A smartphone that can be connected to the Internet is connected to a mobile phone base station (base station) via radio waves, and transmits voice, characters and images to the other party via a communication line. We support practical life. Communication is possible within a radius of several kilometers. It is a wifi jammer, which emits radio waves, which is essential for wireless communication. However, many problems also arose. Someone is still talking loudly in the car. Someone is walking typing a cell phone email. At such times, I want to cut off the telephone signal. I want the signal to stop working. Introduce disruptive equipment. I am using a cell phone jammer to block the radio waves on the train. The radio wave disappeared in the blink of an eye, out of range. Interference from public transport is a problem. Therefore, the correct use of jammers is very important. The use of cell phones is a problem. Place devices that interfere with radio waves from cell phones. It is said to have been started after getting tired of rude customers. The device emits parasitic radio waves. It can emit enough radio waves to interfere with the call. This will worsen the radio waves received by the mobile phone. The phone cannot make or receive calls. This portable jammer goes beyond the “weakness” defined by the radio law and requires a license.

Analysis of Market Demand of Prison Mobile Phone Signal Shielding Project

With the continuous development and popularization of mobile communication tools such as mobile phones, and the continuous improvement of the technical level of personal mobile communication methods, especially after the promotion and application of 3G, 4G, and 5G technologies, it will be used for prisons, labor camps, detention centers, drug rehabilitation centers, etc. The negative effects of similar areas are becoming more and more prominent. In prisons, detention centers and other supervision places, mobile communication tools such as mobile phones are explicitly prohibited, not only for prisoners, but also for supervisors. Once the mobile phone is brought into the prison and put into use, it will bring great harm to the management, safety and development of the prison. Some prisoners use illegally smuggled mobile phones to make calls, send text messages, obtain information, threaten witnesses, and even form gangs and organize escapes. Because of this, the installation of cell phone signal jammer in prisons and other prison places is imminent. Degree!

22 Antennas all Signal Jammers

What factors should be considered in establishing a mobile phone signal shielding system

Due to the influence of the base station, the distance between each base station and the prison is different. Generally, it is recommended that there is no base station within two to three hundred meters near the prison area where the mobile phone signal shielding system is installed. Strong influence!

The scale, number of buildings, structure, size, floor height, etc. of each prison are different. The distribution direction, power, and terrain of mobile phone base stations around each prison are different. The strength of mobile phone signals transmitted from remote base stations is also different. There is no difference. How to arrange the points in each prison needs to be designed according to the actual situation!

Even in the same environment, the base station signal is affected by wind disturbance, air humidity, etc., which will cause fluctuations in signal field strength. In addition, there are differences in field strength between indoor and outdoor spaces, and the ground, building structure, materials and metal objects affect the mobile phone. Shielding the signal causes very complex adverse effects.

Cell phone signal shielding systems are installed in prisons. Most shielding terminals are installed in relatively high or slightly hidden locations, and are not detected by ordinary people, but they may not prevent man-made damage. The influence of future human factors must be considered, including prisons. Guilty (also resisted by prison guards) artificially damaging or cutting off the power supply to the jammer,

With the accumulation of working hours, electronic products such as mobile phone signal jammers will also have normal wear and tear. Several shielding points installed in the prison cannot be guaranteed to operate 100% stably every day. As a manager, you should have a set The simple and convenient centralized control system can detect the man-made damage or normal loss of the shielding point in time, and arrange the maintenance and inspection quickly.

What is the reason that the signal jammer does not work or the effect is poor?

There are many jammers on the market today, but many customers do not know how to use them, so the jammers often do not work or have poor results. Do you know what is causing this phenomenon? Together with signal interference shielding Let’s find out about the device manufacturer Chengdu Saiyue Communication:

1. You must order a suitable shielding device according to your needs, which is more important

①If you want to block mobile phones, then you have to choose 2G 3G 4G full frequency signal jammer. At this point, you must consider whether you want to add additional functions such as GPS (satellite positioning) or WIFI (wireless Internet access)!

②Choose the right power supply: portable jammers have low power, easy to heat, desktop jammers have high power and good heat dissipation! The shielding range of desktop jammers is longer!

③If you want to block the GPS track, you need to choose a two-in-one jammer (low-cost 2G GPS jammer)) at least! Because when you only use the mini GPS jammer to block the GPS, it will be automatically activated by the built-in SIM card Realize GPRS GSM positioning.

16 Antennas Signal blocker

2. After receiving the portable jammer with battery (desktop jammer without battery), it must be fully charged within 6-10 hours;

3. All antennas must be installed according to the markings (1-1 2-2 3-3 4-4 5-5 6-6 7-7 8-8 or GSM to GSM GPS to GPS…). More importantly, don’t open the shield without installing the antenna!

4. Interference range: position signal strength <= -75dBm. The interference distance will vary according to the signal strength and location. If you are close to the signal base station, the effect of the jammer will be very poor!