Research On Microstrip Antenna Array And Folding Planar Reflect Array Antenna

With the rapid development of radar communication and satellite communication,there are more and more demands for high gain,low profile and easy integration of antenna.In this paper,two different types of low-profile high-gain antennas are designed based on the requirements of high gain and narrow beam,and the high-gain microstrip transceiver antenna array,high-gain reductive planar reflector array filter antenna and high-gain circularly polarized reductive planar reflector array antenna are studied.Firstly,according to the requirements of radar system,Taylor synthesis method is used to optimize the transceiver antenna,and a microstrip transceiver antenna array with a center frequency of 24 GHz is designed.The receiving antenna is a microstrip antenna in the form of series feed of 1×12.The simulation gain reaches 16.7d Bi and the side lobe level is less than-15 d B.A 3×12 microstrip antenna array is designed,and the simulation gain is up to 20 d Bi,and the side lobe level is less than-20 d B.Finally,a microstrip transceiver antenna array is formed by combining the two,and the actual object is processed for testing.The measured results of the antenna meet the design requirements,and the high gain performance of the antenna is realized.At the same time,the folding planar reflector array antenna is studied.The reduced reflector array antenna consists of a feed,a primary reflector and a secondary reflector.First the design work in Ka-band high-gain folding plane reflective antenna array filtering,feed designed a rectangular pyramid horn antenna,the main reflector unit USES double average patch type,by changing the size of phase compensation and reverse polarization,vice reflective surface bandpass frequency selective surfaces,is adopted to realize the single direction of polarization filtering.Finally,the integral filter antenna is simulated and tested,and the gain is reached the maximum at 36 GHz.The simulated gain and measured gain are 29.1d Bi and 28.9d Bi respectively,and the aperture efficiency is 45.3% and 35.3%,respectively.Finally,a high-gain circularly polarized reduced planar reflector array antenna working in Ka-band is designed,with a central frequency of 30 GHz.The secondary reflector is mainly studied,and the aperture coupling type frequency selection surface is adopted.The antenna can achieve the conversion from linear polarization to circular polarization while meeting the requirements of low profile and high gain,and the 3d B axial specific bandwidth is 28.9GHz-30.6GHz.