1-bit Digital Programmable Patch Antenna Array With High-intensity Radiation Fields (HIRF) Protection

The digital coding antenna is characterized by low cost,low power consumption,low power consumption,light quality,flexible beam control,and fast scanning speed,so that it can meet the needs of many people/military platforms for beam scanning and low cost antennas,especially in the aspects of drones,car networking and intelligent vehicles.At the same time,due to the rapid development of electromagnetic pulse weapons,electronic equipment has faced extremely severe electric magnetic threat.Therefore,it is of great value to study a low cost,low profile,and the digital coding antenna with strong field protection function.In this paper,how to design a new type of digital coded phased array antenna and how to integrate the protection performance on the antenna are discussed.The unit design theory and implementation method are studied,and experimental verification is carried out.The main work and achievements of this paper are described as follows:1.In this paper,a digital coded phase modulation structure is proposed,which can effectively solve the problems of profile and integration of reconfigurable reflectarray/transmission antenna by controlling the single radiation of two radiating patches to produce one bit phase difference.Aiming at the problems of cost,volume and power consumption of traditional phased array antenna and the profile problems of reflection and transmission new phased array antenna,this paper designs a one-bit digital coding antenna through a simple method,which can control the profile,cost and design complexity better.At the same time,it is found in the simulation and measurement that a large grating lobe will appear at the negative angle of the scanning angle.This paper finds out the reason of the existence through theoretical analysis,and solves the problem by introducing non-uniform feed.2.In this paper,a kind of strong field protection structure of antenna is proposed.By welding diode between the middle feeder and metal ground of GCPW,the antenna has strong field protection function.In view of the current complex electromagnetic environment and the need of new military combat preparation,facing the strong threat of electromagnetic pulse weapon to electronic system,this paper focuses on the RF front end of the electronic system antenna,and studies how to integrate the strong field protection function on the antenna.Finally,by referring to the principle of energy selection,the strong field protection integration of the antenna is realized,and the method has almost no effect on the performance of the antenna.