馈电损耗及高辐射效率微带天线阵研究

 根据串、并馈电微带天线阵列结构，建立了各自等效参数模型，定量分析了微带馈电网络功率损耗对微带天线阵列增益的影响，借助微带线和同轴电缆组成的低损耗混合馈电网络，采用串并馈电方式，完成了C波段4×24元高效率微带天线阵的设计。实测天线阵的各项指标均优于设计要求，其中阵列增益达到25.4 dB，实现了64.5%的辐射效率，较相同阵元数目的微带串馈列实测增益提高1.1 dB，与等效参数理论计算结果很好地吻合。

Feed loss and high radiant efficiency microstrip antenna array

The equivalent parameter models for series and parallel feed microstrip arrays are respectively built, according to the array’ structure. Then the limitation of the microstrip feed network’s power loss on the gain of microstrip antenna array is analyzed quantificationally. With the help of the low loss hybrid feed network which is composed of microstrip lines and coaxial cables, a C-band 4×24 elements microstrip antenna array with high efficiency is designed based on the series-parallel feed architecture. The measurements of the array are better than design goals, especially that the gain of the array reaches 25.4 dB, 1.1 dB higher than that of the series array of the same element number, and the radiant efficiency is 64.5%. The measurements are in good accordance with the theoretical