ResearcH And Implementation Of Spiral Dual Frequency Antenna For Counter UAV

In recent years,after the continuous development of UAV such as DJI,Parrot and 3D Robotics,the price of consumer-grade UAV equipment with more functions is more affordable,and the difficulty of getting started is constantly decreasing,so the UAV can be professionally used.The market is turning to the mass market of consumption,which can become an item that can be used by ordinary people,rather than a luxury that is eye-catching.However,as the market demand is growing rapidly,the number of new UAV devices with more innovative functions is gradually increasing,which in turn brings security and privacy issues.It is carried out in sensitive areas such as national key institutions and troops stationed.UAV flight operations will endanger national security.Therefore,for the increasingly drone drones,the application of counter drone technology in real life has gradually become a research hotspot.UAV make more consumers use because of their small size and easy to use,but the harm is ignored by many people.The drone mainly uses multi-frequency antenna communication to realize the interaction between the remote controller and the operator.The electromagnetic related interference can be used to directly suppress or interfere with the working frequency band of the antenna,so that the drone itself cannot receive the original signal of the remote controller or Directly receiving other signals,so that the drone directly landed on the ground or returned to the remote control,so that it can not work properly,this is the most common solution to use the counter drone.In this paper,a dual-frequency antenna based on helical antenna is designed by using simulation software HFSS.Based on the GPS signal band of the drone itself and the remote control signal band of the drone,the spiral dual-frequency antenna designed in this paper can perform its own radiation performance well,compared with the most widely used single frequency point in actual production.The Yagi antenna and the dual-frequency coaxial feeder antenna have better S-parameters,voltage standing wave ratio,Smith circle diagram and three-dimensional gain pattern of the helical antenna.By modularly assembling a simple counter-driving system,the effect of a counter-running drone is achieved.Finally,the thesis is summarized and prospected.It also has reference significance for antennas in other frequency bands and also prospects for the future of spiral antennas in other fields.