The device consists of a handheld main engine and a battery pack. Hand-held host for three band transmitter antenna integration design, can produce 2.4 GHz uav flight control / 5.8 GHz frequency interference signals, and satellite positioning jamming signal, through the upside of unmanned aerial vehicle (uav) flight control channel and satellite positioning channel blocking interference, making it lose flight control instructions and satellite positioning information, so can’t normal flight, The control effect of return, landing and falling will be produced according to the design of uav.
In offensive and defensive posture, there is usually some distance between the operator of the uav and the sensitive area that needs to be defended. The drone takes off near the pilot and gradually flies over the fortified area. When a drone gets close enough to a fortified area to conduct effective reconnaissance or sabotage, the drone is usually much closer to the fortified area than it is to the operator.
In this scenario, any uplink signal sent by the pilot (from the ground to the drone) would be weak because of the distance. With the same amount of power, the defender will have a stronger signal than the pilot due to being closer to the drone. The defender will also receive a better downlink signal than the manipulator. But the goal of the downlink is to keep it from the pilot, and the distance from the pilot is about the same as the distance from the defender to the pilot. So the blocking of downlink signal does not take advantage of terrain.
It can be seen from the above analysis that jamming the uplink signal is more advantageous. As it happens, the uplink signal is usually the remote control signal, which is directly related to the control of THE UAV. If the uplink signal is interfered, the UAV will lose immediate control and can only run according to the preset steps of the program (usually landing or hovering). While downlink signals are mainly telemetry and images, although there may be sensitive information, it is less important than control signals. In addition, the defenders do not have the advantage in situation, so they usually adopt a laissez-faire attitude to downlink signals.
GPS relies on mid-orbit satellites. In layman’s terms, the signal travels tens of thousands of kilometers to the earth’s surface and is already very weak. So it’s relatively easy to jam GPS signals when the drone is very close to the defender. If you want to fool it, you have to simulate a GPS satellite in a more sophisticated way, which is much more difficult.
interference
At present, the control of uav mainly uses radio communication technology. By sending high-power interference signal to the target UAV, the control signal can be suppressed, and the UAV can be forced to land or turn back.
The United States uses this principle. The gun uses an electronic jammer attached to the frame of the rifle that, once the trigger is pulled, fires a full spectrum jammer signal at the drone, causing it to drop to the ground without receiving the signal.
Once the drone’s signal is confused, it usually has three options: drop to the ground, return to the operator, or make a smooth descent. The rifle has an effective range of 500 ~ 2,000 meters.
