In this paper, a novel mode composite waveguide based on hybrid substrate integrated waveguide and spoof surface plasmon polariton (SIW-SSPP) is proposed. Through different feeding methods, the odd mode and even mode of SSPP are excited simultaneously and operate at the same frequency band. Thus, co-frequency mode multiplexing is achieved for the proposed odd-even mode composite waveguide (OEMCW). The design principle and characteristics of the OEMCW are analyzed in this work. A prototype is fabricated and measured to demonstrate its transmission performance. The measured results indicate that the proposed waveguide can operate from 10.3 GHz to 18 GHz in two modes with the isolation larger than 18 dB.

中文翻译：

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基于混合基片集成波导和仿表面等离子体激元极化结构的模复合波导

本文提出了一种基于混合基片集成波导和欺骗表面等离子体激元极化子（SIW-SSPP）的新型模复合波导。通过不同的馈电方法，SSPP的奇数模式和偶数模式会同时被激发并在相同的频段上运行。因此，针对提出的奇偶模式复合波导（OEMCW）实现了同频模式复用。本文对OEMCW的设计原理和特点进行了分析。制作并测量了原型，以演示其传输性能。测量结果表明，所提出的波导可以在10.3 GHz至18 GHz的两种模式下工作，隔离度大于18 dB。