This paper proposes bandwidth enhancement of a cavity-backed slot antenna using a triangular slot on a half-mode substrate integrated waveguide structure antenna. The bandwidth enhancement was achieved by combining the fixed TE₁₀₁ and the downward shifting TE₁₀₂ modes, resulting in hybrid modes. The design evolution of the slot antenna from a half nonresonating rectangular slot to a triangular slot antenna increased the fractional bandwidth. The simulation result showed that fractional bandwidth increased from 6.27% to 9.1%. It was confirmed by measurement that the fractional bandwidth of 9.87% was achieved which reflects a 350 MHz bandwidth with center frequency at 3.84 GHz. The measured gain at center frequency was 4.2 dBi. It is shown that the radiation characteristics obtained from both measurement and simulation results are in very good agreement.

中文翻译：

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半腔基集成波导天线的腔背三角形槽的带宽增强

本文提出了一种在半模基片集成波导结构天线上使用三角形缝隙的背腔缝隙天线的带宽增强。通过组合固定的TE ₁₀₁和向下移动的TE ₁₀₂来实现带宽增强模式，导致混合模式。缝隙天线从半个非谐振矩形缝隙到三角形缝隙天线的设计演进增加了部分带宽。仿真结果表明，分数带宽从6.27％增加到9.1％。通过测量证实，实现了9.87％的分数带宽，该分数带宽反映了中心频率为3.84 GHz的350 MHz带宽。在中心频率处测得的增益为4.2 dBi。结果表明，从测量和仿真结果获得的辐射特性非常吻合。