The principle of drone interference mainly includes electromagnetic interference, GPS jamming, signal shielding, and optical interference.

Electromagnetic Interference: This is achieved by emitting electromagnetic waves that match the communication frequency band of the drone, interfering with the drone's control signals or communication signals, causing it to fail to correctly receive instructions or maintain stable communication. This type of interference can be continuous or intermittent, depending on the design of the interference device and the application scenario.

GPS Jamming: This involves emitting electromagnetic waves close to the frequency of GPS signals, causing the GPS signals received by the drone to be disrupted or blocked, leading to a decrease in the accuracy of the drone's positioning or a complete loss of positioning capability. GPS jamming devices can target specific frequency bands or cover a broader range of frequencies.

Signal Shielding Technology: This is a method that uses physical means to block or weaken the propagation of electromagnetic waves. In drone interference, signal shielding technology is mainly used to shield the control signals or communication signals of the drone, preventing them from being normally received or transmitted. Common signal shielding methods include using metal shielding materials, signal blockers, etc.

Optical Interference: This method interferes with a drone's visual system or optical sensors. It primarily utilizes bright light sources, lasers, and other devices to disrupt the drone's visual recognition system, preventing it from properly identifying targets or environments. Optical interference methods are particularly effective in specific scenarios, such as at night or in low-light conditions.

The purpose of these interference principles and techniques is to use specific interference devices or methods to cause the drone to lose control, positioning ability, or communication capability, thereby preventing the drone from flying normally or performing its tasks.