This article presented a substrate integrated waveguide (SIW) cavity‐backed self‐diplexing antenna array with frequency beam scanning characteristic. The proposed array consists of 16 SIW cavity‐backed slot antennas. The SIW cavity‐backed slot antenna can be fed by two separate ports to resonate at two different frequencies and achieve high isolation better than 20 dB between two input ports. The proposed element is a typical self‐diplexing antenna. These cavity‐backed slot antennas are shunt‐fed by a compact 1 to 16 SIW power divider and series‐fed by a set of microstrip lines, respectively. As a result, this array achieves an unidirectional radiation pattern at 10.2 GHz with high gain of 15.10 dBi, and a frequency beam scanning characteristic from 7.0 to 9.0 GHz ranging from −50° to 46°.

中文翻译：

---

具有频率扫描特性的新型基片集成波导腔背自双工天线阵列

本文介绍了具有波束扫描特性的衬底集成波导（SIW）腔背自双工天线阵列。提议的阵列由16个SIW腔背隙缝隙天线组成。SIW腔体支持的缝隙天线可以由两个单独的端口馈电，以在两个不同的频率谐振，并在两个输入端口之间实现优于20 dB的高隔离度。提出的元件是典型的自双工天线。这些背腔式缝隙天线由紧凑的1至16 SIW功率分配器分流，并分别由一组微带线串联。结果，该阵列在10.2 GHz处实现了单向辐射方向图，具有15.10 dBi的高增益，并且在7.0至9.0 GHz范围从-50°至46°范围内进行了波束扫描。