Research On UAV Communication Interference System Front End

Unmanned Aerial Vehicle(UAV)is commonly known as Drone.With the continuous development of Chinese aviation industry,the UAV industry has become a new direction for all parties in recent years due to its many advantages such as practicality,smallness and convenience.Nowadays,drones are commonly used in military exercises,firefighting,crime prevention,engineering experiments,and aerial photography.However,due to some factors such as imperfect supervision,the phenomenon of abuse of drone has occurred from time to time.At the same time,accidents such as out-of-control crashes of small drones frequently occurred,which has seriously threatened public safety and personal privacy.Therefore,it is imperative to study and develop Anti-UAV systems.In this paper,an UAV Communication Interference System Front End is designed after analyzing the frequency bands used by Chinese drones,analyzing signal characteristics and summarizing the experience of seniors.The system includes three main parts: signal source,noise source and mixing amplification module.The three sub-systems cooperate with each other through division of labor,and finally make the entire system work normally.This article first introduce the background of the research topic,explain the current research status in the field,and summarize the development direction of the anti-UAV system.Then,the relevant theories such as principles of communication interference,GPS signal,DDS and PLL theory are analyzed.With these theoretical guidelines,and then combine with the actual situation in China,the various circuit parts of the system are designed for the phenomenon of abuse of drones.The paper illustrated the design ideas.The design process of each parts are described in detail.Various components of the circuit and the whole system are tested for related indicators after manufacturing the physical circuit.Test result is suitable according to expectations and requirements.At the end of this paper,the design results of the entire project are summarized.The insufficient to be improved and the next work are pointed out.