Abstract:An improved dual-band dual-feed Yagi antenna is designed and implemented to deal with the security threat of civil Unmanned Aerial Vehicle(UAV) to military targets and other key parts, which requires UAV interference antenna. Firstly, according to the technical characteristics of the civil UAV, the technical indicators of interference antenna are presented, the specific form of the antenna is selected, and the main shape sizes are calculated. Then, the specific parameters of dual-band dual-feed Yagi antenna are obtained by HFSS simulation software. Finally, the antenna is fabricated and measured. Simulation and experimental results show that the designed antenna has the characteristics of high gain, light weight and miniaturization, and can meet the requirements of UAV interference antenna.