The radiating element of array antenna is air dielectric microstrip patch antenna, which has high efficiency, and the feed network is low loss air strip, which can reduce the loss of the feed line.

阵列天线辐射单元采用空气介质的微带贴片天线，辐射效率高；阵列天线的馈线网络采用低损耗的空气带状线形式，降低了馈线损耗。

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The design equation of the microstrip patch antenna and the element gap of the array antenna have been given.

详细给出了微带贴片天线设计公式和阵列天线阵间距的选择。

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