In this paper, a novel compact microstrip patch antenna with a boresight filtering gain response is proposed. The proposed antenna consists of a radiating patch, a ground plane, two pairs of slots respectively etched on the radiating patch and the ground plane, two shorted vias connecting the radiating patch and the ground plane. The slots on the ground plane not only provide a gain null in the lower transition band, but also introduce a new low‐resistance resonance which is beneficial to widen the impedance bandwidth. The slots on the radiating patch provide another gain null in the upper transition band. The two shorted vias are used to further adjust the reflection coefficient and the gain performance of the antenna. Since no extra circuits are introduced, the proposed antenna is compact. A prototype operating at 3.0 GHz was fabricated and measured. It demonstrates that the proposed antenna has a bandwidth of 3.5% and a gain of 6.0 dBi in a profile of 0.015 λ₀. At the same time, a good filtering gain response is realized.

中文翻译：

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具有视轴滤波增益响应的紧凑型贴片天线设计

本文提出了一种新型的具有视轴滤波增益响应的紧凑型微带贴片天线。所提出的天线包括辐射贴片，接地平面，分别蚀刻在辐射贴片和接地平面上的两对缝隙，连接辐射贴片和接地平面的两个短路通孔。接地平面上的缝隙不仅在较低的过渡带中提供零增益，而且还引入了新的低电阻谐振，这有助于扩大阻抗带宽。辐射贴片上的缝隙在较高的过渡带中提供了另一个零增益。两个短路通孔用于进一步调整天线的反射系数和增益性能。因为没有引入额外的电路，所以所提出的天线是紧凑的。原型机在3。制作并测量了0 GHz。结果表明，所建议的天线的带宽为3.5％，增益为6.0 dBi，分布为0.015λ ₀。同时，实现了良好的滤波增益响应。