In this paper, a thirty‐second‐mode circular substrate integrated waveguide resonator (TMCSIWR) is firstly investigated, which well retains the fundamental mode and high‐order modes (TM_0n0 modes) in circular SIW resonator (CSIWR) for stable transmission. Considering miniaturization, high Q and multi frequency selection of TMCSIWR systematically, each TM_0n0 mode in TMCSIWR can be effectively selected to achieve independent passband by adjusting feed position and coupling distance. Meanwhile, each TM_0n0 mode and non‐resonant modes produce multiple transmission zeros by mode coupling. Furthermore, arc groove disturbance effectively adjust coupling to achieve high selectivity. Finally, a multi‐zero TM₀₃₀ mode TMCSIW bandpass filter is designed and fabricated. The measured results are in good agreement with the simulated results.

中文翻译：

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基于二十三模式圆形SIW谐振器的高选择性模式选择带通滤波器

本文首先研究了一种30秒模式的圆形衬底集成波导谐振器（TMCSIWR），它在圆形SIW谐振器（CSIWR）中很好地保留了基本模式和高阶模式（TM _0n0模式），以实现稳定的传输。系统地考虑到TMCSIWR的小型化，高Q和多频选择，可以通过调整馈电位置和耦合距离来有效地选择TMCSIWR中的每个TM _0n0模式以实现独立的通带。同时，每个TM _0n0模式和非谐振模式通过模式耦合产生多个传输零。此外，电弧槽扰动可有效地调节耦合以实现高选择性。最后，一个多零TM ₀₃₀设计并制造了模式TMCSIW带通滤波器。测量结果与模拟结果吻合良好。