一种高增益多频带微带贴片单元的设计

摘要

设计了一种由圆、正八边形、矩形组合构成的微带贴片天线,其使用同轴线馈电.采用有限元法对所设计天线的电特性进行了仿真研究.同时也对天线在不同尺寸参数下的性能指标进行了对比分析.结果表明,天线兼具高增益和多频带的特性,在2.25~2.33GHz、3.51~3.7GHz、4.34~4.6GHz频带内,带内回波损耗全部小于-10dB,天线最高增益达到7.37dB,且天线的E面和H面辐射波束较好,半功率波束宽度约是60°;仿真结果证实了所设计的天线具有良好的性能指标.%This paper designs a microstrip patch antenna,which composed of round,octagon,rectangular and using co-axial feed;The finite element method is using in the antenna simulation research on the electrical characteristics. This paper also analyzed the performance of the antenna under the different size parameters.The results show that the anten-na with the characteristics of high gain and multiband in 2.25~2.33GHz, 3.51~3.7GHz, 4.34~4.6GHz frequency band that return loss is less than -10dB;The highest gain of antenna is up to 7.37 dB;The E plane and H plane antenna radiation beam are better and half-power beamwidth is about 60°;The simulation results confirmed the design of the antenna with good performance.