A programmable hybrid circuit is proposed, which is composed of two reconfigurable spoof surface plasmon polariton (SPP) waveguides loaded with varactor diodes and a substrate integrated waveguide (SIW). By manipulating their dispersion behaviors, the band‐pass effect is achieved in the hybrid circuit, in which the upper and lower cutoff frequencies are determined by the SPP waveguide and SIW, respectively. When two SPP waveguides are configured to have the same cutoff frequency that is higher than the SIW's cutoff, the proposed circuit can realize a power division; when one SPP waveguide is reconfigured to reject the waves from SIW, this circuit will be a band‐pass filter. As a typical application, a logic “OR” gate with 2‐bit coding is designed by programming the bias voltages applied to the varactor diodes loaded on the unit structures of the SPP waveguides. All functions are demonstrated by measurement results that agree with numerical simulations very well. The work provides more potential applications in multifunctional integrated circuits and digital communication systems.

中文翻译：

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基于可重构SPP和空间波导模式的可编程混合电路

提出了一种可编程混合电路，该电路由两个装有变容二极管的可重构欺骗表面等离子体激元（SPP）波导和一个衬底集成波导（SIW）组成。通过控制它们的色散特性，可以在混合电路中实现带通效应，其中上限和下限截止频率分别由SPP波导和SIW决定。当两个SPP波导被配置为具有比SIW截止更高的截止频率时，所提出的电路可以实现功率分配。当重新配置一个SPP波导以拒绝来自SIW的波时，该电路将成为带通滤波器。作为典型的应用 通过对施加到加载在SPP波导单元结构上的变容二极管的偏置电压进行编程，可以设计出具有2位编码的逻辑“或”门。测量结果证明了所有功能，这些结果与数值模拟非常吻合。这项工作在多功能集成电路和数字通信系统中提供了更多的潜在应用。