What is the principle of anti-UAV system?

Simply put, it is to find the drone, then locate the drone, and then counter the drone through signal interference.

Discovering drones

Radar: (detection)

Electric scanning radar: the extremely expensive party may cost tens of millions, so don't consider friends with a small budget.

Machine scanning radar: left scanning and right scanning, with a circle of 6s. The radar needs to scan the object three times to determine it, that is, 6*3= 18s to determine the object, which gives some drones an opportunity.

Phased array radar: 4-5 aircrafts, the included angle between them is 90, 1.5 seconds is a point, and 1.5 * 3 = 4.5 seconds can determine the object, so the UAV has no chance. It is the most used radar for all drones on the market.

But in practice, you will encounter such a situation. When the UAV sees the radar and looks for obstacles to hide, such as behind trees or other obstacles, the radar will not be able to find the UAV.

Radio: (test)

At present, the frequency bands of domestic UAVs are 1.5G, 2.4G and 5.8G

Automatic search, discovery, identification and direction finding of illegally invaded unmanned aerial vehicles are carried out through the radio detection and direction finding subsystem.

Radio detects whether there is a drone through the frequency band, so even if there is an obstacle, it can be detected as long as the drone sends out the corresponding frequency band.

The question is: why use radar to detect when using radio?

The radio can't find a drone flying silently. What is silent flight?

Silent flight: to put it bluntly, it is a flight that uses navigation to set a good route.

Tracking UAV

Photoelectricity: (tracking)

Photoelectricity is actually a tracking system. When the radio and radar find the drone, they will track and lock it, and provide location for jamming strikes.

Visible light monitoring (color, black and white): used for daytime or daytime target detection, verification and tracking.

Infrared thermal sensor: it can be used to detect infrared rays emitted to the target and identify the drone target under the condition of no light or weak light.

Infrared laser monitoring technology: used to improve the resolution of target monitoring under the condition of strong light at night.

Combat UAV

L Blocking jamming: The jamming signal covers multiple frequency bands of UAV telemetry and image transmission link prediction, which is characterized by simple implementation and does not depend on any external equipment, but there are some problems such as low jamming efficiency and inability to effectively interfere with the modified wireless communication link.

L Accompanying interference: According to the real-time information such as communication frequency, signal bandwidth and frequency hopping period between the target telemetry link and the image transmission link detected by external electric reconnaissance equipment such as UAV passive detection and positioning system, the digital interference source based on software radio architecture dynamically generates interference signals with matching frequency and bandwidth. This mode has the advantages of high jamming efficiency, strong pertinence and simple implementation, but the jamming effect depends heavily on the detection performance and accuracy of external detection equipment.

L Interception jamming: the characteristics of UAV wireless communication signals are processed and analyzed in real time by using the interception channel provided by the system, and the digital jamming sources dynamically generate jamming signals with matching frequency and bandwidth according to the analysis results, thus effectively jamming and suppressing the UAV wireless communication link. This method is the technical development trend of UAV RF jamming equipment, which has the advantages of high jamming efficiency and no dependence on any external electrical detection equipment, but its implementation is relatively complicated and requires high information processing ability of digital jammer.