In this study, a low cost, broadband and high gain multilayer multiresonator microstrip antenna (MSA) is designed. It consists of one metallic fed patch at the bottom layer and two circular patches (1B2 T) are printed on the bottom side of the top FR4 substrate layer, which is air suspended. Two configurations with the bottom patch of circular and elliptical shapes are compared. The elliptical 1B2 T MSA provides better bandwidth (BW), i.e. 53.4% with peak gain of 9.8 dBi. The antenna design parameters are selected to provide maximum BW with uniform gain. The elliptical 1B2 T MSA is further enclosed in a metallic cavity, which improves the BW, gain and front to back (F/B) ratio of the antenna. The elliptical 1B2 T MSA with cavity enclosure is fabricated and tested. Experimental results are in agreement with simulated ones. The elliptical 1B2 T MSA with cavity provides 55.7% BW with peak gain of 12.1 dBi and F/B of >18 dB. The proposed antenna can be used in GPS, 2G, 3G, 4G and Wi-Fi frequency bands applications.

中文翻译：

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宽带高增益多层多谐振器椭圆微带天线

在这项研究中，设计了一种低成本，宽带和高增益的多层多谐振器微带天线（MSA）。它由底层的一个金属补片和两个圆形的补片（1B2 T）印刷在顶部FR4基底层的底面上，该基底悬浮在空气中。比较了具有圆形和椭圆形底部补丁的两种配置。椭圆1B2 T MSA提供更好的带宽（BW），即53.4％，峰值增益为9.8 dBi。选择天线设计参数以提供具有均匀增益的最大带宽。椭圆1B2 T MSA进一步封装在金属腔中，从而改善了天线的带宽，增益和前后（F / B）比。带有空腔外壳的椭圆形1B2 T MSA进行了制造和测试。实验结果与模拟结果一致。带有腔的椭圆形1B2 T MSA可提供55.7％的带宽，峰值增益为12.1 dBi，F / B大于18 dB。所建议的天线可用于GPS，2G，3G，4G和Wi-Fi频段应用。