Author: 897918909@qq.com

We often receive such requests from some customers: expect to purchase a mobile phone signal jammer that is small in size, light in weight, and easy to carry. The interference signal penetrates the wall to cause signal interference to the area on the other side of the wall.

According to the customer’s expectations, the selection of equipment is actually to find a low-power mobile phone signal jammer. Of course, we have suitable models for this type of product to recommend, but the next question is: can it penetrate through the wall to achieve interference? What about the effect of the indoor signal?

Before answering this question, we must first understand two key information points: the first is the characteristics of the signal transmission, and the second is the influence of the wall material on the signal penetration through the wall.

About the characteristics of signal transmission: the mobile phone signal jammer we provide, the interference signal emitted is actually a white noise interference signal corresponding to the working frequency of the mobile phone. To put it bluntly, this is the wireless radio frequency signal, the characteristics of wireless signal transmission, and X-rays are not the same type, X-rays can go right through walls. If a wireless signal encounters a wall during transmission, it is somewhat similar to a light wave or a sound wave, and its ability to directly penetrate is very limited, and more of it reflects the phenomenon of diffraction, reflection, and refraction of the wireless signal.

Let’s pay attention to the influence of wall material on the signal penetration ability. Different wall materials and wall thicknesses have different effects on the penetration ability of wireless signals. Let’s take the interference signal emitted by the mobile phone signal jammer as an example. If the interference signal is facing a completely solid reinforced concrete wall, then this material will reflect and refract almost all the interference signal back, and directly penetrate the wall. Interfering signals are almost negligible. But if the interference signal is facing an ordinary brick wall, the ability of the interference signal to penetrate the wall will be stronger than that of reinforced concrete, but the degree of signal attenuation will still be relatively large. Let me illustrate with another example: If the interference signal is facing a gypsum board wall or a glass partition, then when the signal penetrates this type of wall, the attenuation of the signal directly passing through is not large, and the attenuation value is usually 5 -8dB.

Finally, to sum up, can the low-power mobile phone signal jammer penetrate through to achieve the effect of interfering with the signal in the house? On the one hand, this depends on the transmission power of the interference device itself. In essence, of course, the greater the transmission power, the more obvious the effect of interference signal penetration. On the other hand, it also depends on the material and thickness of the wall. When encountering a completely solid reinforced concrete wall, it is somewhat unrealistic to expect interference signals to pass through the wall.

When we look at the product manual of the mobile phone
signal jammer, we will find that the marked effective interference distance value is generally a general range value, rather than a fixed and precise value. So some customers asked: Why can’t the precise value of the interference distance be marked? Some customers even ask us directly: the distance that needs to be interfered is a radius of 10 meters, and one meter more or one meter less will not work. Can a request like this really be fulfilled?

In actual use scenarios, it is impossible to require the interference distance of mobile phone signal jammers to reach an accurate value. Unless it is in a special customized use scenario, for example: on the demarcated borderline, there are completely solid reinforced concrete walls, and the walls are thick enough, then in such a place, mobile phone signal interference After the device is turned on, the interference signal emitted can hardly penetrate the thick wall, and the interference distance is limited to the position of the wall. However, it is important to note that the precise interference distance in this scenario is limited by the walls in the environment, rather than by the adjustment of the mobile phone signal jammer itself.

Although the transmission power of the mobile phone signal jammer is a fixed value, theoretically speaking, the interference signal emitted from its antenna, in the process of transmitting and transmitting to the surroundings, the size and scope of its interference are gradually attenuated. However, whether the signal interference is effective depends on whether the mobile phone signal can completely suppress the base station signal. This is a process of competing and suppressing each other. However, since there may be multiple base stations in the surrounding environment, after the signal of the base station is transmitted over a long distance, the strength of the signal will vary to a certain extent due to the influence of various factors, which further leads to mobile phone The interference signal of the signal jammer is in the process of suppressing the base station signal, resulting in a dynamic change. The specific performance is that the interference distance jumps within a certain range.

In the past two years, 5G jammers have replaced the original old jamming devices and have been applied in many on-site environments where mobile phone control is necessary. In various use scenarios, most of them choose fixed installation, but there will still be such a demand. Some customers need to be convenient to carry and have a certain degree of concealment due to the need for temporary or mobile use of equipment. So, can the current 5G jammer be picked up and concealed without being discovered?

Before the advent of the 5G era, the jammers at that time usually only needed to use 6 to 8 jamming modules to ensure the interference of the mobile phone signal. 6 to 8 jamming modules are assembled together, together with the battery for power supply, etc., the shape of the final product is similar to that of a common walkie-talkie, which is also very portable and portable, and also has a relatively good Excellent concealment performance, can be used in the bag or clipped on the belt, basically it is not easy to be found.

However, with the widespread use of 5G signals, or to achieve effective interference with all 5G signals, it is necessary to add multiple mobile phone frequency bands used by 5G signals to the device. These newly added 5G frequency bands include at least: 700MHz, 2600MHz, 3400MHz, 3500MHz, 4800MHz, etc. From this point of view, a standard 5G jammer will need at least 12 jamming modules. The number of corresponding antennas also needs to be increased.

In addition, since the increase in the number of jamming modules has reached 50% of the previous jamming equipment, the battery that provides power for its work must also increase its capacity accordingly, otherwise the additional power consumption will not be enough to meet the normal and effective work of the equipment. time.

At present, as a manufacturer of 5G jammers, regarding the progress of new product development and design and the actual production of products, we believe that there are products that are convenient to carry around and can be used in a concealed manner. At present, there is no suitable corresponding product. Handheld or portable 5G jammers have already been designed and produced, but in terms of concealment performance, due to their appearance size and weight and other parameters, compared with the previous old products, they have indeed increased a lot. Of course, some other manufacturers continue to use the previous product solutions with small-sized casings, but this is actually a compromise made at the expense of sacrificing the output power of the device and reducing the most basic interference performance of the product.

Although 6G communication is still in the stage of demonstration and research and development, and mobile phones using 6G standard have not been produced yet, the 6G era will come sooner or later, which is a foreseeable development trend. Then the question arises, when the 5G mobile phone jammers currently used are upgraded to 6G in the future, can the original modules still be retained and used?

Customers will definitely consider this issue from the perspective of interference equipment procurement costs. After all, when 6G communication technology is popularized, the previous 2G, 3G, 4G, and 5G technologies will not be completely abolished, and mobile phones of various standards will definitely be long-term. In the state of coexistence, if the 5G jammers purchased and used in the past have no failure or performance degradation, then continue to use the original equipment or modules, and at the same time use the method of adding 6G frequency band modules, which can reduce a lot of purchases. cost.

It can be said with certainty that the customer’s idea is completely feasible. In the foreseeable future, once 6G is widely signed and operated, at least three ways to upgrade to 6G mobile phone jammers can be adopted for the original 5G mobile phone jammers:

The first is to keep the original jamming equipment and add a new mobile phone jammer that only targets 6G signals. The new equipment and the old equipment work independently, and at the same time, after turning on the mobile phone, it can realize all mobile phone jammers including 6G signals. Signal interference function.

The second way is: understand the existing 5G mobile phone jammers in advance, or consult the manufacturer to determine whether the device has reserved space for frequency band upgrades, that is, whether there is a 6G signal interference module reserved in the device Space. If the equipment has been reserved, you only need to contact and communicate with the manufacturer to add the 6G signal interference module to the equipment.

The third way is: contact the original 5G mobile phone jammer manufacturer, and negotiate with the manufacturer to let them recycle and reuse the original equipment.

In the application fields of drone defense and drone countermeasures, handheld
drone gun jammers are the most widely used category of products. Because of its small size and relatively close weight, it is very convenient to carry, so it has been recognized and chosen by customers. However, the customer also found a problem during the use process: Many types of drone gun jammers purchased in the past were powered by either a built-in rechargeable battery or an external dedicated battery. To replace the battery of the equipment, or to add a spare battery, it is often only possible to find the source manufacturer to order and purchase this type of special battery. So the customer’s demand was put forward: why the power supply battery of the drone gun jammer is not made detachable? Why is the battery made into a dedicated package or in the form of an overall package? Is it possible to consider choosing the most common 18650 battery, so that the battery can be purchased anywhere and replaced at any time?

In the past, manufacturers of drone gun jammers did not consider the application requirements in this aspect when designing products in the early stage. They often focused on whether the equipment’s interference performance for drones was up to standard. For convenience, Flexible use of drone gun-shaped jammers, especially the disassembly and replacement of power supply batteries, did not make targeted designs to meet the basic power supply needs as the basic design goal, but also to match the overall structural design of the product , so the battery is designed as a built-in or dedicated battery pack.

However, our Nanjing Bokang Electromechanical Technology Co., Ltd. has professional designers of drone gun jammers, and we always pay attention to the development and application of drone countermeasure products. After knowing that customers do have this consideration and After the demand, a new generation of upgraded product design project was launched immediately, and the trial production samples of the product were assembled soon.

The latest drone gun-shaped jammer, the size of the main body of the gun body is further reduced. In addition to meeting the basic performance of the six-band drone signal jamming, the biggest highlight is: the design of the magazine-style battery box, The battery box is in the form of a magazine, just push it directly under the fuselage of the drone gun jammer. The battery in the battery box is the 18650 battery that can be purchased at any time in various stores. This 18650 battery is not only cheap, but the key is that no matter what brand of battery it is, it can be completely used and replaced.

If customers choose this latest drone gun jammer, they will completely get rid of the anxiety about the power supply time. The magazine type battery box or 18650 batteries can prepare enough usage in advance without any scruples.

In anti-terrorism operations or exercise plans for dealing with emergencies, there is a relatively common dangerous scene of dismantling bombs, that is, after discovering suspected explosives or remote-controlled bombs, special police EOD personnel (or bomb disposal experts) need to be on the spot To dismantle the detonating device and prevent the further deterioration and seriousness of the situation, in order to prevent the terrorist from using the remote control to detonate the bomb maliciously during the process of dismantling the bomb, thus causing irreparable damage to the bomb dismantling personnel, it is very necessary to Turn on the remote bomb jammer at the bomb disposal site. The next question arises. In this case, can the remote-controlled bomb jammer use the method of first detecting suspicious frequency points and then implementing jamming? Or for the sake of safety and security, directly conduct full-band, indiscriminate signal interference on the bomb disposal site?

The method of detecting suspicious frequency points mentioned here refers to a set of signal receiving and analyzing devices specially used for scanning and receiving radio communication signals. It firstly receives and scans all the normalized wireless communication signals in the target area. Then, the frequency scanning analysis is carried out continuously. Once a certain sudden communication frequency point or frequency is found, the alarm signal is triggered immediately and the bomb jammer linked with it is activated at the same time, so as to instantly detect the sudden communication frequency point. Effective suppression and interference.

Through the above description, it seems that the entire operation process meets the needs of the bomb disposal work, but there is actually a very huge safety hazard: the suspicious frequency has gone through the process of detection and discovery, and then the alarm signal and the bomb jammer are activated. The process of sending the power-on signal, which must consume a certain amount of time, although this time process may be very, very short, or even reach the level of milliseconds, but there will be a time difference after all. The key to the problem is, who Can you guarantee that the signal from the remote control is not enough to effectively detonate the remote control bomb within this millisecond time difference? If the bomb is detonated, the consequences will be disastrous!

Moreover, as far as we know, there is another technical hidden danger in the signal detection and signal interference equipment in the past: if the criminals who make the remote control bomb have a high IQ and a strong enough technical level, if the remote control signal transmission and reception If the frequency point adopts multi-frequency point, ultra-wideband and fast frequency hopping transceiver, it really cannot ensure that this type of bomb jammer can effectively intercept and terminate the transmission of remote control signals 100%.

The application of 5G communication technology has been widely deployed and popularized in various cities in the past three or four years, and mobile phone end users have almost completed the process of upgrading from 4G to 5G mobile phones. This is like a spear and a shield. , In places where the use of mobile phones needs to be restricted, the upgrading of 5G signal jammers is also being carried out simultaneously. However, according to the information fed back to us by many dealers and customers, during the installation and commissioning of the mobile phone signal interference project, the thorny problems encountered are obviously much more than in the previous 3G or 4G era, especially in the bustling major cities in the city. This is especially the case in urban areas. Here we will summarize the pain points and difficulties of installing and using 5G signal jammers in cities, and propose corresponding analysis and solutions.

According to the construction and deployment information of 5G base stations disclosed by major operators, we can clearly know that in the main urban area of the city, the construction density of 5G base stations is much higher than that of previous 3G and 4G base stations. Moreover, from the perspective of 5G spectrum division applications, 2600MHz and 3600MHz in the high-frequency band are mainly used. Compared with the 1.8GHz frequency band and 2.1GHz frequency band used by 3G and 4G a few years ago, this is a higher frequency. One step further. The higher the frequency, the worse the diffraction ability of radio frequency information, the worse the anti-interference ability, and the shorter the transmission distance. In order to ensure stable transmission of 5G signals and reliable data transmission rate, various communication operators can only build 5G base stations more densely. This has brought huge trouble to whether the 5G signal jammer can exert the ideal jamming effect. The closer the 5G base station is to the 5G signal jammer, the worse the interference effect of the jamming device will be. If the construction density of 5G base stations is less than 500 meters apart, or even reaches a distance of two to three hundred meters, the use of conventional low-power 5G interference devices will indeed hardly cause much interference.

Due to the excessive construction density of 5G base stations, the impact on the 5G signal jammer cannot ensure sufficient interference range. The solution is usually tried in the following ways: for the 5G frequency band on site, separately increase the high-power module of the corresponding frequency band; Or replace the original omnidirectional antenna with a lower gain value with a directional antenna with a higher gain value.

People who know about wireless jammer products will find such a phenomenon. Although it has been developed for about 20 years, in terms of the switching mode of wireless jammers, it is rare to see that the switch is controlled by a remote control. In the 2G and 3G era more than ten years ago, a few models could occasionally be seen using remote control switches, but in the past ten years, almost no shielding device has the function of remote control switch. So the question is, why not use the most common remote control switch for the wireless jammer switch?

The answer to the question is: it is not that the manufacturer does not want to use the remote control for switch control, but it is a last resort. Because the operation of starting and shutting down with the remote controller will cause the switch function to be unstable and unreliable. In the end, it can only be that the manufacturer has to give up the control method of using the remote controller.

There are two types of remote controllers commonly used now. The first type is infrared remote control, and the second type is wireless remote control.

Among them, the infrared remote control method is most commonly used on the remote control of the TV, but this method is characterized by a short remote control distance and no obstacles in the middle, otherwise the remote control will fail even at a short distance. However, in actual use, wireless jammers are often installed in relatively hidden locations, and sometimes blocking objects are placed in front of them, which will seriously weaken the remote control switch performance of the remote control.

The second type of wireless remote control, its remote control distance will be significantly greater than the form of infrared remote control, common obstacles will not have much impact on the performance of the remote control, but the key point is that our wireless jammer itself will affect the wireless remote control. The wireless frequency used by the remote control is mostly 433MHz remote control frequency point, and some use WIFI2.4G or 5.8G as the remote control switch, but the current wireless jammer itself requires effective shielding for these wireless frequency bands. There will be an interesting but very embarrassing ending: the user can turn on the wireless jammer normally through the remote control, but as long as the shielding device is turned on and working normally, it will continue to block the communication frequency of the remote control. If the user wants to use the remote control It will be very difficult to turn off the wireless jammer, unless the remote control is close to the host of the shielding device.

The online mobile phone signal jammer system is usually installed in schools, prisons, large conference centers and other places, because when these units interfere with mobile phone signals, they need to cover a very large area and involve multiple buildings, multiple The coverage of the interference signal in the room adopts the cellular networking method, which will inevitably require a large number of interference equipment terminals. It is very common for such customer units to install dozens or even hundreds of jamming devices. The next question arises. After the jammer system is delivered to the customer and put into use normally, what about the online version of the mobile phone signal jammer system? What about troubleshooting and analysis?

First of all, the manufacturer of the jammer system will give a standardized guidance document, and will require customers or agents to point out full-time maintenance personnel to regularly check the online version of the mobile phone signal jammer system according to the requirements of the guidance document, and will check The results are registered and fed back to the customer’s leader in charge, so as to determine whether further maintenance or replacement is required.

Maintenance personnel can use the main control software of the mobile phone signal jammer system on the Internet to quickly query the working status and fault status of each mobile phone signal jamming terminal in the system. The status query of the signal jamming terminal should at least include: equipment Remote start-up, shutdown, power adjustment and other functions can respond quickly, and can perform on-off control or power adjustment for each interference module in the device.

The above-mentioned status query should be applied to every interference point in the entire mobile phone signal jammer system. After checking all the interference points, you will get a complete maintenance report, from which you can clearly know which specific interference devices have failed. Here we need to remind the maintenance personnel that the fault points detected by the main control software of the jammer system can complete normal network communication with the jamming terminal. In fact, there may be another possibility, that That is, there is a network failure between some interference terminals and the main control server, which makes the main control software unable to complete the sending and uploading of terminal data. When encountering such a problem, a special prompt message of network communication interruption will appear on the main control software. The maintenance personnel must first check and solve the problem of smooth network transmission.

In prisons or detention centers, it is no news to install cell phone jammer systems. If you ask the purpose of installing cell phone jammer systems in prisons, many people will answer quickly and directly: Of course, it is used to shield prisoners in prison. The cell phone signal is used to prevent them from communicating with the outside world. In fact, this is only an answer to the superficial question, and does not conduct an in-depth analysis of the essence of the problem.

Why were prisons established? Of course, criminals are detained. Can criminals communicate with the outside world in prison? In fact, it is possible, but there are many restrictions on this kind of external contact. For example, you can only contact with designated relatives and friends, and you must use the fixed phone installed in the prison. There are also restrictions on the call time. So what is the purpose of installing cell phone jamming systems in prisons? Obviously, this is not the normal and compliant external contact for criminals.

As an important place of supervision for detaining criminals, prisoners serving sentences are not allowed to carry, possess and use mobile communication terminals such as cell phones. In a prison with a sound management system and full implementation of various inspection and review measures, normally speaking, cell phones are not allowed to be brought into the prison, let alone handed over to inmates. Since under normal circumstances, criminals do not have cell phones in their hands, why do prisons install cell phone jammer systems?

It is necessary to observe whether all the management systems of the prison have been fully implemented and implemented. As the old saying goes, one hundred secrets and one sparse. If these personnel are not self-disciplined enough, do not keep their cell phones well, or even directly communicate with the inmates, and simply hand over their cell phones to criminals for use, then things will get worse. For such illegal acts, the overall process is very difficult. It is concealed and cannot be detected and stopped immediately, so as the prison management, it can only adopt the method of installing a cell phone jammer system to directly block all cell phone signals in the prison. In this way, even if a few cell phones are brought into the prison, due to the existence of the cell phone jammer system, the cell phone will have no signal and cannot communicate with the outside world normally.

From the previous analysis, it can be seen that the superficial phenomenon is that the purpose of installing cell phone jammer systems in prisons is to target criminals from using cell phones. More serious violations of prison terms regarding restrictions on cell phone use.

Usually, if there are no special requirements on the site, most of the mobile phone signal jammers purchased by customers use omnidirectional antennas, especially among low-power jamming devices, omnidirectional antennas are almost standard configurations. The appearance of omnidirectional antennas is generally in the shape of a round tube, or in the shape of a soft whip. It occupies less space and the cost is not high, so it will be favored by manufacturers. However, the customer’s focus is often not on the appearance of the antenna, but on how much area is covered by the signal of the interference device after it is transmitted through the omnidirectional antenna? So, how to give customers a more vivid description, so that customers can understand the signal coverage area of the omnidirectional mobile phone signal jammer?

For the signal coverage direction of the omnidirectional antenna, the simplest visual description can be expressed as: Assuming that the omnidirectional antenna is the origin of signal transmission, then the interference signal is transmitted and diffused around the origin through this origin, and its direction is divergent and formed. The coverage area is like a spherical area. The omnidirectional antenna of the cell phone signal jammer is the center of the spherical area. From the center to the edge of the outer wall of the sphere, it is the entire area that the jamming device can effectively cover.

The above description can only be regarded as the most basic model description. But in fact, the real signal diffusion model is closer to the shape of the magnetic field than the standard spherical shape. It can be expressed in a more vivid way: the real signal diffusion model tends to be more like the outer contour of an apple, in which the omnidirectional antenna is like the core of an apple, and the outer contour of an apple is like the coverage of Ertuo signal The area, the direction of the extension line at both ends of the antenna, is the direction with the shortest transmission distance of the interference signal, and the direction perpendicular to the axis of the antenna, that is, the horizontal direction, is the direction with the largest transmission distance and coverage of the interference signal.

Of course, the above description is only based on the ideal environment simulation. In the actual use process, the signal coverage area of the mobile phone signal jammer will be different. For example, it is impossible for the jamming device to be installed completely suspended. During the downward divergent transmission of the interference signal, when it encounters the ground below, it will be completely blocked or a small part will be reflected and demolished through the ground. Another example: if the mobile phone signal jammer is installed on the wall, the back of it will also be blocked by the wall, and the interference signal will often not penetrate completely. There will also be some reflection and refraction phenomena.

After some large units install the mobile phone signal jammer system, they often ignore the follow-up repair and maintenance of the system. After a period of accumulation, it is possible that due to a number of small problems, the accumulation of small things may lead to the operation of the entire system. Instability, then, how should these units that install mobile phone signal jammer systems formulate system overhaul and maintenance plans?

Here, based on years of on-site experience, we propose some routine and relatively easy-to-implement suggestions:

1. Check and repair the hardware faults in the mobile phone signal jammer system, and prevent the disconnection of network lines and power supply lines;

2. Carefully review whether each IP parameter in the software setting is unique, and whether the marked name and location match the actual installation location. The IP of each jammer terminal in the mobile phone signal jammer system is unique, and there should be no devices with overlapping IP addresses in the entire system;

3. The maintenance order of the mobile phone signal jammer system: A: First check the IP setting error and correct it; B: Use the software to first find out the jammer terminals that fail to communicate in the entire row, column or building. It is a line problem, and the problem of network disconnection and power outage of this line should be solved first; C: For scattered jammer terminals, one-to-one investigation is required.

4. The fast and good operation of the entire mobile phone signal jammer system is based on the premise that each device and each node in the system is powered normally and the network communication is normal. When a single node or several branch lines are disconnected in the system software , the more the quantity accumulates, the longer it will take to query the work status as a whole. Therefore, it is strongly recommended that after completing the overall overhaul of the system again and returning to normal, assign a dedicated person to monitor and query each node on a regular basis. After discovering individual node failures, it should be reported immediately and personnel should be arranged to repair and recover. You can’t just report without repairing, and you can’t accumulate more!

5. It is clearly stipulated that every node or equipment terminal in the entire mobile phone signal jammer system cannot be powered off or disconnected without permission;

6. A special person is responsible for establishing a ledger for the daily inspection and maintenance records of this mobile phone signal jammer system;