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本文设计了一款毫米波的具有高隔离度的微带双工贴片天线。天线由双层同样厚度的介质板构成,两条馈电结构置于下层介质板背面,且正交分布形成双极化,利用缝隙耦合进行馈电,所得能量再辐射到顶层六角形贴片,从而天线能够得到良好的匹配和较高的隔离,并且具有结构简单、增益高的优点。仿真结果表明,天线两谐振点分别为54GHz和60GH,端口隔离度可以达到60d B以上,增益分别为4.27 d Bi和7.45 dB i,此时辐射效率分别为99.7%和98%。由于天线具有较高的辐射效率和端口隔离度,因此可实现双工工作。
This paper designed a millimeter-wave microstrip patch antenna with high isolation. The antenna is made up of two layers of dielectric plates of the same thickness. The two feeding structures are placed on the back of the lower dielectric plate, and are orthogonally distributed to form a dual polarization. The antenna is fed by gap coupling, and the energy is radiated to the top hexagonal patch. Thus, the antenna can be well matched and isolated, and has the advantages of simple structure and high gain. The simulation results show that the two resonant points of the antenna are 54GHz and 60GH, respectively, and the port isolation can reach more than 60d B with gain of 4.27 d Bi and 7.45 dB i respectively. The radiation efficiency is 99.7% and 98% respectively. As the antenna has high radiation efficiency and port isolation, it can achieve duplex work.