新型圆极化汉字艺术天线线性阵列的设计与实现

Design implementation of a new circular polarized linear array for Chinese character art antenna

1种新的圆极化(CP)中国梦天线阵被提出,其中中国汉字贴片有着极深的文化底蕴和新时代理念,即单馈电CP“中”字、“国”字和“梦”字形贴片天线组成三元天线阵.天线接地板上设计了1个一对三功率分配器作为天线阵列的馈电网络,使其端口的输出振幅相等而相位不等.该设计创新之处在于利用适当的相位激励非相同的单馈圆极化单元,使其形成增益与带宽符合应用要求的线性天线阵列.利用仿真和实验相结合验证,得到了2.28~2.59 GHz的3 dB轴比带宽,而在2.5 GHz的宽边增益约为9 dBic,带宽内的总效率为82%.

A new circular polarization(CP)“Zhong Guo Meng”(Chinese dream)antenna array is proposed,which involves the Chinese character patch with a cultural element and a new era concept.In other words,the single feed CP"Zhong","Guo"and"Meng"patch antennas form a three element antenna array.A pair of three power dividers are designed on the antenna ground plate as the feed network of the antenna array,so that the output amplitudes of the ports are equal and the phases are unequal.The innovation of the design is to use the appropriate phase to excite the different single feed circular polarization elements,so that the gain and bandwidth of the linear antenna array can meet the application requirements.The 3 dB axial ratio bandwidth of 2.28-2.59 GHz is obtained by simulation and experiment,while the wide edge gain of 2.5 GHz is about 9 dBic,and the total efficiency in the bandwidth is 82%.