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在腔模理论基础上分析了单阵元圆极化微带贴片天线,研究了圆极化微带阵列天线的设计方法,采用相位旋转法设计了中心频率为35.75GHz的64元圆极化微带阵列天线与平面和差结构,使天线和和差馈电处于一个平面。利用Ansoft公司的HFSS软件进行了仿真优化。经过对天线实物的测试,此天线提供了21dB的增益,具有良好的轴比和驻波比,差波束零值深度大于20dB。
Based on the cavity mode theory, a single array circularly polarized microstrip patch antenna is analyzed. The design method of circularly polarized microstrip array antenna is studied. The phase rotation method is used to design a 64-circular circular polarization with a center frequency of 35.75GHz Microstrip array antenna and the plane and poor structure, so that the antenna and the differential feed in a plane. Using Ansoft HFSS software simulation optimization. After a real test of the antenna, the antenna provides a gain of 21dB with good axial ratio and VSWR, and the difference beam zero depth is greater than 20dB.