一种高性能Fabry-Pérot贴片天线设计

Design of a novel Fabry-Pérot patch antenna with high property

提出了一种新的极化转换单元结构,可作为覆层用于设计具有高辐射性能的微带贴片天线.通过采用在介质基板上下表面涂覆的矩形金属贴片切角的方式,实现了传输系数主极化及交叉极化幅度差和相位差在9.0~12.8 GHz频段范围内分别稳定在±3 dB及90°±15°之间,从而取得了宽带极化转换性能,最后在微带贴片天线辐射的线极化波的激励下,实现了-10 dB反射系数带宽为2.8 GHz(9.0~11.8 GHz),3 dB轴比带宽为11.0~11.5GHz,峰值增益为9.8 dBic,这为新体制雷达天线的设计应用提供了一种新思路.

This paper proposes a novel polarization conversion metasurface,which can be used as cladding to design microstrip patch antennas with high radiation performance.Through adopting corner-cut metal patches cladded on the upper and lower surface of the medium substrate,the amplitude and phase differences of the main polarization and cross polarization of the transmission coefficient are stabilized between±3 dB and 90°±15°within the frequency range of 9.0-12.8 GHz,respectively,thus obtaining the broadband polarization conversion performance.Finally,with the excitation of linearly polarized wave radiated by the microstrip patch antenna,the-10 dB reflection coefficient of 2.8 GHz(9.0-11.8 GHz)is realized,together with a 3 dB axial ratio of 11.0-11.5 GHz,and peak gain of 9.8 dBic,which provides a new way of thinking in the design and application of new-system radar antenna.