基片集成波导背腔式缝隙天线设计

利用谐振腔形成对称场激励,设计实现了一种基于多层基片集成波导技术的背腔式缝隙天线,并对其辐射特性进行了仿真研究。该天线利用双层基片集成波导实现了天线的馈电电路和背腔结构,利用工作于谐振状态的基片集成波导谐振腔对缝隙进行激励,同时通过加载缝隙圆环,显著降低了天线的回波损耗,并具有剖面低、重量轻、易集成的优点。研究了缝隙圆环对天线辐射性能的改善作用,制成了测试样片,天线-10dB回波损耗的带宽为150MHz,最高增益为8dB,交叉极化增益的最高为-12dB,测量结果与仿真分析吻合较好,验证了设计方法的有效性。

A Design of Cavity Backed Slot Antenna Based on Substrate Integrated Waveguide

A novel cavity backed slot antenna based on multi-layer substrate integrated waveguide is designed and manufactured by utilizing the resonant cavity to form symmetrical field excitation, and its radiation characteristic is studied and simulated. The proposed antenna using double -layer SIW to realize its feeding circuit and cavity structure has the advantage of low profile, light weight and convenient integration. The promoting effect of ring-slot structure on the radiation performance is considered. Finally, the test structure with a bandwidth of -10 dB return loss at 150 MHz is manufactured. And the maximum gain is 8 dB, and the maximum cross-polarized radiation is -12 dB. The good agreement between the measured results and the simulated results demonstrates that the design method is effective.