A compact and wideband slot antenna backed by a square substrate integrated waveguide (SIW) cavity is presented. By exciting the dual-slotted SIW cavity with an offset coaxial feed, a transverse electric (TE)110 resonant mode along with two hybrid modes as combinations of TE110 and TE120 resonances can be generated within a close range. The triple resonances contribute to producing a wideband response while maintaining a compact antenna structure. An antenna prototype with a total size of 0.49λ 0 × 0.49λ 0 × 0.16λ 0 is manufactured and experimentally tested. Measures results show that an operating band of about 33.0% is obtained. Meanwhile, it also exhibits stable unidirectional patterns and moderate gains over the whole band.

中文翻译：

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使用三重谐振和混合模式的紧凑型宽带 SIW 背腔缝隙天线

提出了一种由方形基板集成波导 (SIW) 腔支持的紧凑型宽带缝隙天线。通过用偏置同轴馈电激励双槽 SIW 腔，可以在近距离内产生横向电 (TE)110 谐振模式以及作为 TE110 和 TE120 谐振组合的两种混合模式。三重谐振有助于产生宽带响应，同时保持紧凑的天线结构。制造和实验测试总尺寸为0.49λ 0 × 0.49λ 0 × 0.16λ 0 的天线原型。测量结果表明，获得了约33.0%的工作频带。同时，它还表现出稳定的单向模式和整个频段的适度增益。