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The principle of drone jammer

Admin Posted on 2022-10-06

The drone jammer consists of a handheld host and a battery pack. The handheld host is an integrated design of three-band transmitter antennas, which can generate 2.4GHz/5.8GHz frequency band UAV flight control interference signals and satellite positioning interference signals at the same time. Blocking interference, so that it loses flight control instructions and satellite positioning information, making it unable to fly normally. Depending on the design of the drone, it will have the control effect of returning, landing, and falling.

In offensive and defensive situations, there is usually a certain distance between the UAV operator and the sensitive area that needs to be fortified. The drone takes off from the vicinity of the manipulator and then gradually approaches the fortified area. When a drone is near a fortified area and can carry out effective reconnaissance or sabotage activities, the drone is usually much closer to the fortified area than it is to the operator.

In the above situation, all uplink signals sent by the operator (from the ground to the UAV) will be weak due to the distance. With the same power, the defender will have a stronger signal than the manipulator due to being closer to the drone. Defenders will also receive stronger downlink signals than manipulators. However, the defensive goal of the downlink signal is to prevent the operator from receiving it, and the distance from the drone to the operator at this time is similar to the distance from the defender to the operator. Therefore, the blocking of downlink signals does not have a terrain advantage.

It can be seen from the above analysis that it is more beneficial to interfere with the uplink signal. It just so happens that the uplink signal is usually a remote control signal, which is directly related to the control of the drone. If the uplink signal is disturbed, the drone will lose immediate control and can only operate according to the steps preset by the program (usually landing or hovering). The downlink signals are mainly telemetry and images. Although there may be sensitive information, they are less important than control signals. In addition, the defenders do not have an advantage in the situation, so they usually take a laissez-faire attitude towards the downlink signals.

GPS relies on medium-orbit satellites. In layman's terms, the signal reaches the earth's surface after tens of thousands of kilometers, and it is already very weak. So it is easier to jam the GPS signal when the drone is very close to the defender. If you want to deceive it, you need to use more complex means to simulate GPS satellites, which will be much more difficult.

anti drone gun jammer

Signal interference from drone jammer

At present, the control of UAVs mostly uses radio communication technology. By transmitting high-power jamming signals to the target UAVs and suppressing the control signals, the UAVs can be forced to land or return by themselves.

Jammer mart used this principle to develop a gun-shaped drone jammer. This gun installs an electronic jammer on the frame of the rifle. Once the trigger is pulled, the drone gun jammer will send a full-band jamming signal to the drone, so that the drone is out of the control of the operator and cannot receive the control signal. Automatically land on the ground.

Once the drone's signal is messed up, it usually has 3 options: fall to the ground, return to the operator, or descend smoothly. This rifle has an effective range of 500 to 2000 meters.

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