A X‐band aperture‐coupled patch antenna based on backed substrate integrated cavity (SIC) and pins‐loaded cross slot with dual linear polarization and high isolation is investigated. Loaded pins are applied to cross aperture to reduce the mutual coupling between the slots. SIC is used to reduce the coupling caused by parallel plate mode. Moreover, one‐cross‐point structure of feed networks is used to further improve the isolation. A prototype of the dual‐polarized antenna is fabricated and measured. The measured results show that the dual‐polarized antenna exhibits impedance bandwidths better than 30% (voltage standing wave ratio ≤2), cross polarizations better than −27 dB. And the isolation between the two ports is above 51 dB. To the best knowledge of the authors, this is the highest isolation yet achieved for a patch antenna with wide bandwidth.

中文翻译：

---

基于背衬基板集成腔和引脚加载十字槽的高隔离度双极化微带贴片天线

研究了基于背衬衬底集成腔（SIC）和双线性极化和高隔离度的引脚加载十字槽的AX波段孔径耦合贴片天线。加载的销钉应用于交叉孔，以减少插槽之间的相互耦合。SIC用于减少由平行平板模式引起的耦合。而且，馈电网络的单点结构用于进一步改善隔离度。制作并测量了双极化天线的原型。测量结果表明，双极化天线的阻抗带宽优于30％（电压驻波比≤2），交叉极化优于-27 dB。两个端口之间的隔离度高于51 dB。据作者所知，这是宽带天线的最高隔离度。