Blog

As an important safeguard against the illegal intrusion of UAVs, UAV signal jammers are undoubtedly the preferred equipment. However, all kinds of UAV signal jammers are emerging in an endless stream. The distinctions and differences between them are not only in appearance, transmission power, signal interference distance, etc., but there is actually a particularly important classification basis: That is the directionality of the interference signal after it is emitted. Therefore, some customers often ask us questions: Is it better to choose a directional antenna or an omnidirectional antenna for the UAV signal jammer?

First explain how to distinguish directional antennas from omnidirectional antennas. The omnidirectional antenna is relatively simple and easy to identify. It is usually in the shape of a round tube or a round rod. In most cases, it is kept vertical to the ground and installed vertically. The types of directional antennas are much more complicated than omnidirectional antennas, and the appearance of different directional antennas is also very different. There are roughly three types of directional antennas used in UAV signal jammers: the first type is Yagi antennas, the second type is logarithmic periodic antennas, and the third type is flat-panel directional antennas.

Regarding the question of whether to choose a directional antenna or an omnidirectional antenna for the UAV signal jammer, the answer should be to understand the customer’s needs and application environment in advance. For example, the customer needs to carry out all-round UAV defense for very open places or buildings with a very large area, so it is most suitable to choose an omnidirectional antenna for the UAV signal jamming instrument in this case. . It does not need to pay special attention to which direction to guard against, it only needs to install the interference device at a higher position in the guarded area or on the roof of the tallest building.

If the customer needs a miniaturized and easy-to-carry UAV signal jammer, such as a temporary defense scene environment, or can detect the incoming UAV by visual inspection, then you can choose to have a directional Antenna for drone signal jammer. Because the directional antenna can be made as small and lightweight as possible, the directional antenna can also form an integrated structure with the host of the interference device.

In addition to the above, there is another situation where a directional antenna can also be configured for the UAV signal jammer, that is, if the customer has a UAV detection and identification system, after realizing the early detection and early warning of the intruding UAV, It can intelligently link and open the UAV signal jammer at the lower port, and after identifying the incoming direction of the intruding UAV, the directional antenna configured at this time can undoubtedly ensure the strike effect in a precise direction.

The popularization and application of 5G mobile phones have been more than three years, and the 5G mobile phone jammers, which are iteratively upgraded with 5G communication technology, have also developed and applied rapidly. The replacement of 3G or 4G mobile phone jammers has almost been completed. In this upgrading process, some customers often give us feedback: I hope that as a manufacturer, we can make the power or the coverage of the shielding signal larger, then the problem comes, the shielding distance of the 5G mobile phone jammer can be as large as possible How much do you do? Can the shielding range be made infinite?

Among the determining factors that affect the shielding distance or shielding range of a 5G mobile phone jammer, the most important ones include: 1. Transmitting power. 2. Antenna gain. 3. The installation height of the equipment or antenna. 4. Shield the obstacles in the signal transmission path. Let’s analyze them one by one.

1. Transmitting power: At present, the power amplifier device that can be applied to 5G mobile phone jammers, that is, the power amplifier, the limit value of its output power is usually 100W-200W. There are not no power amplifier devices with output power greater than 200W, but there are very few manufacturers, and the output is very low. This makes the cost of power amplifier devices exceeding 200W RF power output very, very high. In a 5G mobile phone jammer, generally at least 10-12 shielding modules need to be included. If you want to pursue greater output power and shielding range, you must replace all the power amplifiers of these 10-12 modules with 200W Above, this will greatly increase the device cost of the device.

2. Antennas for 5G mobile phone jammers can be omnidirectional antennas or directional antennas. The gain value of omnidirectional antennas will generally be 2-8dBi, and the gain value of directional antennas will be much higher, reaching 10-30dBi . The higher the gain value of the antenna used, the more the transmission distance of the shielded signal can be improved.

3. The installation height of the equipment or antenna: Simply put, the higher the installation height of the 5G mobile phone jammer, the better, but this also needs to distinguish the type of equipment and application scenarios. The maximum installation height of shielding equipment for low-power models should not exceed 3 meters. The installation height of the high-power 5G mobile phone jammer, unless it is based on the height of the building, if it is installed on a hanging pole, its height will usually not exceed 8-10 meters.

4. Obstacles in the shielding signal transmission path: This mainly refers to the interruption of the signal of the 5G mobile phone jammer to continue to transmit and expand the range due to terrain fluctuations or large buildings.

Combined with the above analysis, it can be seen that the shielding distance of the current 5G mobile phone jammer must not be infinite. It is limited by the cost of the power amplifier device, the gain value of the antenna, and also by the installation height and obstacles in the installation environment.

During various types of examinations, it has long been commonplace to install wireless signal jammers in each examination room. However, almost more than 90% of the examination rooms, in the selection of shielding equipment, choose the low-power type. Why do they choose this way? There are high-power shielding devices that are normally sold in the market, why not use high-power wireless signal jammers in the examination room?

The answer to this question can be analyzed and answered from two angles: one is to analyze from the product performance and application scenarios of the high-power wireless signal jammer itself, and the other is to analyze from the construction side of the examination room.

First of all, let’s talk about the high-power wireless signal jammer. Its biggest feature is its high transmission power and wide coverage. However, it will be clearly indicated in its instruction manual that high-power wireless signal jammers are mainly used in open outdoor environments. Environments such as examination rooms are obviously indoor environments, and they are numerous and densely distributed. , Each examination room room is still wall isolation. This kind of wall barrier will cause great errors in the shielding signal, and it is easy to cause the shielding signal to only cover a local area or floor. It is precisely in consideration of these factors that high-power wireless signal jammers are strictly required not to be installed in buildings, but must be installed at an appropriate distance around a building. And for a building, it is usually necessary to arrange at least 2-4 sets of high-power shielding equipment to basically meet the needs of signal shielding.

The high-power wireless signal jammer itself also has the characteristics of large volume, heavy weight, high heat dissipation and ventilation requirements, and high purchase cost. These characteristics also determine that it is not easy to choose high-power models in the examination room.

This leads to the second reason for analysis from the construction side of the examination room: due to the large size and heavy weight of the high-power wireless signal jammer, the installation and construction are relatively complicated and time-consuming. Since the purchase cost of high-power wireless signal jammers is much higher than that of low-power shielding equipment, the price ratio between the two can reach 50:1 or even 100:1. Also take a building as an example, assuming this building There are 50 examination room classrooms in the building, using low-power wireless signal jammers, even if each classroom is equipped with one, the total number is 50. However, if it is replaced with a high-power wireless signal shielding device, at least 2-4 units may be needed. According to the conversion of the aforementioned price ratio, it can be concluded that if the high-power shielding equipment is used, the construction investment cost may need Improve 2-4 times.

We often receive inquiries from private customers: it is clearly specified that a high-power wireless signal jammer needs to be ordered, but the device is used on a vehicle, and it must be considered that the car can be used normally in the process of driving and in a stationary state. The power supply scheme only wants to use the battery (battery) that comes with the car as the power source, then the question arises: can the high-power wireless signal jammer be powered by the car battery?

Let’s talk about the answer first: Sorry, almost all high-power wireless signal jammers cannot be powered by the car’s original battery. Why do you say that? The reason is that what the customer requires is a high-power shielding device. How much power does the high power refer to here? As a manufacturer, in terms of shielding equipment for vehicle applications, we usually refer to a single RF module with an output power of more than 50W as high power. However, a complete set of high-power wireless signal jammers can be At least it will include no less than 12 high-power shielding modules. In this way, the RF output power of a complete set of shielding equipment will not be lower than 600W. Please note that the 600W here refers to the RF output power, not the power consumption of the whole set of equipment. How much will the power consumption be? Generally, the ratio of power consumption to RF power is 3:1, that is to say, when the RF output power reaches 600W, the power consumption should be around 1800W.

According to the above conversion and solution, it is easy to get the answer. The power consumption of a set of high-power wireless signal jammers is at least 1800W. The capacity of the conventional car’s own battery is far from meeting such a large capacity. power requirements. Moreover, compared with the problem of battery capacity, there is also the problem of the safety of the original car circuit that cannot be ignored. The original power circuit inside the vehicle can only meet the maximum output power supply demand of about 200W. If the wireless signal jammer is not used for power supply, it will be very easy to cause safety accidents such as line overloading and burning lines.

However, the answers to the above questions are only for traditional fuel vehicles. With the continuous rise of new energy vehicles, there are now many new pure electric or hybrid electric models. These models provide at least 3000W external power supply output ports. Customers only need to carefully check the technical indicators of the power output of these models, and then use a high-power wireless signal jammer to obtain power through such models. It should be possible to try.

In recent years, with the promotion and construction of standardized examination room projects, mobile phone signal jammers have become a must-have technical support product in the examination room, and they will be installed in each examination classroom in a fixed installation manner, abandoning the need for every examination in the past During the period, the method of temporary distribution and unified collection after the examination is adopted. Then the following question came out, what precautions should be taken when the mobile phone signal jammer is fixed in the examination room?

The examination room is a number of classrooms used in the examination room. The installation positions of mobile phone signal jammers in the classroom are usually as follows: above the blackboard in front of the classroom, on both sides of the blackboard, on both sides of the blackboard at the back of the classroom, and in a certain area of the classroom. Relatively centered position on one side of the wall. No matter which location you choose to install, you should pay attention to at least the following:

1. The installation height should be higher than the height of a person raising his arm. Specifically, it should be no less than 2 meters. There are two reasons for this: one is to ensure that after the shielding signal of the mobile phone signal jammer is emitted, the When propagating the signal, you can get all-round coverage without encountering obstruction. The second is to prevent artificial malicious contact or damage to mobile phone signal jammers;

2. The power cord that supplies power to the mobile phone signal jammer should adopt standard electrical work standards. It is necessary to install a protective tube for the power cord. Never connect a power cord casually. The power cord connection should be well insulated and protective measures;

3. In classrooms equipped with mobile phone signal jammers, if equipped with digital multimedia teaching equipment, especially those using wireless mice in computer teaching, it is recommended to replace the wireless mouse with a wired mouse, because the current mobile phone signal jammers Almost all have the function of shielding wireless WIFI and Bluetooth signals. If you need to use a wireless mouse to operate the computer during the test, you will not be able to complete the mouse operation normally due to the signal shielding effect.

4. Pickups and playback speakers are generally installed in the examination room. When choosing the installation location of the mobile phone signal jammer, the distance between the pickup and the speaker should be opened to the greatest extent. This is because the mobile phone signal jammer is in the After starting up and working, there will be a certain degree of electromagnetic radiation within the range of one to two meters around the transmitting antenna, which may have a negative impact on the normal operation of the above-mentioned equipment.

Customers often come to us and ask us to provide a frequency jammer that can be used flexibly. At the same time, they put forward a request: they need to be used in the car, and they only want to supply power through the cigarette lighter on the car. Ask us if we have a suitable car frequency. An interferometer is available for recommendation.

For the customer’s application needs, we must first figure out which areas the customer uses frequency interference to solve the signal interference. If the customer expects to solve the signal interference of a large range and a long distance outside the vehicle, then he must choose a high-power Type of frequency jammer, because the high-power type of jamming equipment transmits a lot of power, the required power consumption is also very large, which has far exceeded the normal output power carrying capacity of the vehicle cigarette lighter. Therefore, if it is to solve the signal interference outside the vehicle, it is not within the scope of our next discussion.

If the customer expects to solve the signal interference problem inside the vehicle, there are still many types or models of frequency jammers that can be recommended. The cigarette lighter on the car can generally provide an output power of less than 200W. In other words, as long as the power consumption of the electrical load does not exceed 200W, it can be directly powered by the cigarette lighter. Some of the frequency jammers we produce and provide are directly equipped with a 12V cigarette lighter power supply interface. When using this kind of jammer products, it will be very convenient, just plug in the cigarette lighter power plug directly. In addition, some models are only equipped with a 220V AC power input plug, which requires customers to purchase an additional vehicle power inverter. In the actual use process, the input end of the power inverter should be connected to the car cigarette lighter first. On the interface of the inverter, the AC220V alternating current at the output end of the power inverter is supplied to the frequency interference meter.

It is feasible to use the cigarette lighter on the car to power the car frequency jammer, but the premise is that it can only supply power to low-power signal jamming devices. Customers must pay special attention to the safe use of the equipment when using it. It is necessary to ensure that the placement or fixing of the frequency jammer in the vehicle must be secure and must not affect the safe driving of the vehicle. If the car is stationary for a long time and still needs to continue to supply power to the vehicle frequency jammer, because the capacity of the battery on the vehicle is limited after all, it is strongly recommended that the engine of the vehicle should not be turned off even if the car is parked and stationary. It can prevent the battery from being over-discharged and the battery from losing power.

Because of the requirement to maintain the discipline and seriousness of the meeting process, and at the same time avoid being accidentally disturbed during the meeting, more and more units have chosen to install mobile phone signal jammer systems in the meeting room, so that Effectively prevent some incidents that suddenly affect the meeting process due to forgetting to turn off the mobile phone or adjusting the mobile phone to a silent state. At the same time, it can also allow the people participating in the meeting to focus on the content of the meeting and no longer use their mobile phones frequently. So what should our customers consider when installing a mobile phone signal jammer system during the construction of the meeting room?

The first is to plan the installation location of the mobile phone signal jammer system in advance. If the project design can be carried out before the decoration of the meeting room, then the most favorable installation location can be planned, such as a hidden location in the central area of the meeting room. You can also make auxiliary installation cabinets or installation boxes in advance, and arrange the power supply lines and intelligent network cables to the installation locations in advance.

If the installation of mobile phone signal shielding is carried out in a conference room that has been decorated, it should first be considered to use an appropriate concealed installation location in the conference room for installation, such as the ceiling or ceiling of the gypsum board above the conference room, or the chairman The inside of the desk, or the shadow box on the walls around the conference room, etc., but it must be noted that the selected location should have a good ventilation environment, because the host of the mobile phone signal jammer system has certain requirements for heat dissipation , a confined space with no air circulation or poor heat dissipation cannot be used to install a mobile phone signal jammer system.

There are usually wireless microphones, wireless speakers or wireless projection screens, wireless mice, etc. installed in the conference room. If there are these electronic devices, you should first confirm the wireless frequency used by these electronic products, and then communicate with the mobile phone signal. The manufacturer of the jammer system communicates to confirm how to allocate and debug the frequency band of the host in the mobile phone signal jammer system in the future. At the same time, the host of the device should be kept as far as possible from the above-mentioned electronic products. The distance we give is generally not less than 1-2 meters.

In the period of time that is almost parallel to the popularization, application and upgrading of mobile phones, mobile phone signal jammer products have also made great progress. Today, this industry has gone through more than 20 years. During these more than 20 years, Many customers will re-purchase signal jamming equipment every few years due to the upgrading of mobile phones. Whenever they re-select products, the price and interference range of jamming equipment have always been the most concerned matters for customers, so the problem arises. A: Is the price of mobile phone signal jammer proportional to the range of interference?

Customers who have learned about the price of our jamming equipment usually have a general impression: the price of low-power mobile phone signal jammers is relatively cheap, while the price of high-power mobile phone signal jammers is relatively expensive. Especially the higher the price of mobile phone signal jammers with higher power. From this, it can be concluded that the higher the RF transmission power, the higher the price of the interference device.

The greater the radio frequency transmission power value of the interference device, the corresponding result is basically the greater the interference range, or the greater the interference distance and interference radius. If you want to increase the transmission power, you must use a power amplifier with a higher output power. The higher the power amplifier is, the higher the purchase cost will be. Some interference modules, in order to obtain greater output power, even adopt a multi-stage power boosting method, using multiple power amplifiers to amplify the power step by step, and finally obtain the maximum output power. This multi-level promotion method also virtually increases the cost of many devices and production costs.

It is clear that the price of mobile phone signal jammers is directly proportional to the interference range. The most common low-power jamming equipment used in the market or in conference rooms on the market has a relatively low purchase price because of the huge output of such products. The equipment itself has a small number of components, simple process and easy assembly. However, as the required interference range increases, the price of high-power mobile phone signal jammers will inevitably rise. This is not only the reason for the increase in the cost of electronic components, but also the structure, appearance, heat dissipation, antenna and other supporting components of the product. Costs have increased substantially.

In a few months, we will enter the annual college entrance examination season and high school entrance examination season. Many schools have already begun to strengthen the construction of standardized examination rooms in response to these examinations. One of the important tasks is the need for a comprehensive overhaul or upgrade of 5G Mobile phone signal jammers, so as to ensure that during the upcoming college entrance examination or high school entrance examination, some students who take the exam can effectively prevent cheating through mobile communication tools such as mobile phones or wireless electronic products. Then the question immediately came out: what preparations should be done before upgrading the 5G mobile phone signal jammer in these examination rooms?

As an organizer or manager of a standardized examination room, it is first necessary to distinguish the implementation goals and implementation plans of this project. The implementation goal is relatively easy to determine. It must ensure that all mobile phone signal types must be completely shielded, and it should also include common wireless communication signals such as WIFI, Bluetooth, wireless data transmission, and walkie-talkies. The formulation of the implementation plan should be based on the construction status of the early projects of each school.

If some schools have done mobile phone signal shielding construction projects in the past few years, but because the shielding equipment at that time did not have the function of 5G shielding, then the implementation plan for such schools can be divided into two types, one is to check the original Whether the device has the space to upgrade the 5G shielding of the original machine, and contact the original equipment manufacturer to ask whether the upgrade can be completed by adding a 5G shielding module to the original shielding device. Another way is to continue to keep the original shielding equipment, and repurchase a batch of mobile phone signal jammers that are aimed at the 5G signal frequency band. Blocking of all cell phone signals.

If some schools have never installed signal shielding equipment in the early stage, or although they have purchased it long ago, but the use time is too long, the original shielding equipment is too old, and it is almost impossible to work normally, facing the implementation of such schools The solution is relatively simple, that is to directly purchase the current mainstream 5G mobile phone signal jammer for a new installation.

Before upgrading the 5G mobile phone signal jammer in the examination room, you should focus on understanding and analyzing the number and installation location of the original shielding equipment, and carefully check the performance indicators of each equipment one by one. It is necessary to confirm whether each shielding device is faulty or not. Once a problem with the shielding device is found, the manufacturer of the 5G mobile phone signal jammer should be contacted as soon as possible to maintain all the equipment normally before the start of the large-scale test.

Due to the widespread popularity and application of 5G mobile phones in recent years, customers who need mobile phone signal shielding have to face a problem: all places that need to achieve mobile phone shielding must also complete the signal for all 5G mobile phones shield. Therefore, as a manufacturer, we often have customers who come to us and ask us: How should the old mobile phone signal jammers be maintained and upgraded?

For customers who ask us such consulting questions, we can understand that these customers must be in the spirit of saving and want to reduce construction costs as much as possible. This idea is worth advocating and encouraging, and it is true that some old mobile phone signal jammers can be upgraded to meet current needs.

Customers should first confirm that these old shielding devices are available for purchase, what is the model, and where is the manufacturer. If necessary, you should contact the original manufacturer in time to ask whether the original model has room for upgrade.

According to our experience, if the purchase date of the mobile phone signal jammer is four or five years ago, there is often no room for upgrade. Most of the manufacturers who were purchased two or three years ago will reserve the installation space required for the upgrade module in advance. . What if the original old shielding equipment simply doesn’t have enough space for installation?

Customers don’t need to worry too much, as long as the original mobile phone signal jammer can still work normally, then it can at least maintain the original working performance, and it should be able to completely shield the 2G, 3G, and 4G signals in the mobile phone system. Customers do not have to worry about having to upgrade the original equipment, but can consider adding a mobile phone signal jammer dedicated to the 5G standard next to the original equipment to make up for the signal shielding function of the missing 5G frequency band.

However, customers need to be reminded that the above-mentioned solution of adding a 5G mobile phone signal jammer outside the original shielding device is generally only applicable to the stand-alone version, that is to say, the original device only needs to separate one power supply Just power on. If the original shielding device is a network version, it will be very difficult to add additional and upgraded hardware devices to continue to integrate perfectly with the original network.

The special military operation between Russia and Ukraine has been going on for nearly one year. Over the past year, ordinary people have learned many details about the fighting process between the two sides from various sources. Some fans of military themes are very concerned about it. , and asked us: Will frequency jammers be used when Russia and Ukraine are wrestling with each other and the war situation is escalating?

Although we can obtain a lot of video materials about this military conflict from various official media or self-media platforms, including many front-line reports of the battle between the two sides, unfortunately, in almost all common news content, it is difficult for us to find any The existence of frequency jammers, and it is rare to hear reports about the application of frequency jammers in this military conflict. Could it be that neither side really used it? The real situation is certainly not the case.

Judging from the development of military conflicts in the past year, both Russia and Ukraine are still engaged in a relatively restrained war. This is mainly because Ukraine is far behind Russia in terms of military combat supplies. From the beginning, it did not intend to completely knock down Ukraine at once, but with Ukraine’s tenacious resistance and the continuous military assistance from European and American countries, the high-tech arms and new-tech weapons invested by both sides are constantly upgrading. Especially in recent months, both sides have continued to put drones into actual combat use.

We have seen many pictures of drones attacking the ground from the news. These published pictures show that there must be no frequency jammers in use under the on-site environment at that time, and then we should be able to imagine: In fact, there are still a lot of battle scenes, and the attack of drones has been effectively defended. How to defend against drones? For both sides of the ground battle, the simplest and most effective way is to deploy frequency jammers on the battlefield to attack drones.

Of course, the conflict between Russia and Ukraine is far from reaching the end. In the future, it may require a long-term confrontation, or a process of mutual ebb and flow, and the two sides repeatedly seesaw. It will definitely be used more widely, but these applications are usually not convenient for public display or publicity.

With the construction of digital campus network in recent years, almost all schools have built a very mature and perfect campus network. During the same period, each school also built jammers in succession in order to cooperate with the construction project of standardized examination room. System project, then the question follows: Whether it is a jammer system project that has been built or will be newly built, can it be directly connected to the network platform of the campus network for unified management and control?

If the installation and commissioning of the jammer system project has been completed in the past few years, it may be that the signal shielding terminal equipment with networking function was not selected to support the signal shielding terminal equipment at the time of model selection and purchase. The power supply of the signal shielding terminal has been integrated with lines, which can only satisfy the function of unified startup or shutdown, and it is not to mention intelligent networking and intelligent management, and it is impossible to realize the functions of fault detection and alarm for any signal shielding terminal. For this kind of case, there are still remedial or upgrading solutions. As a professional manufacturer of campus jammer systems, we specially provide a controlled device for intelligent networking. You only need to connect this controlled device to the power input end of each shielding terminal in series. The centralized line controller at the remote end is connected to the campus network of the school through the network cable to realize the intelligent networking of the overall system. Some customers may have doubts: there is no network cable connection between the centralized line controller mentioned above and each controlled device, how is this how to form a network and transmit control signals? In fact, the technical principle is very simple. The communication between our master control terminal and the controlled terminal adopts two communication methods of wireless communication and power carrier for simultaneous signal transmission. The two signals are independent of each other, but as long as there is one signal The stable operation of the system can be ensured by normal transmission and reception.

If the school is planning to build a campus jammer system, then we also have a better and latest version of the signal shielding terminal that can be recommended, which directly has a WLAN network interface. For example, when it is installed in each classroom, it only needs to use one of the most common network cables to connect the signal shielding terminal to the nearest network interface of the campus network in the classroom, because each device has independent IP address information, just like The form of computer LAN networking is the same, which is extremely simple and easy. Using this method to directly connect the campus jammer system to the campus network platform will greatly save construction time and installation workload.