In this article, a compact bandpass filter (BPF) with dual‐wideband is developed using single loop complementary split‐ring resonators (CSRRs) loaded substrate integrated waveguide (SIW). The dual‐wideband response is achieved by etching the CSRRs with a bandstop characteristics on a high‐pass SIW filter structure. The characteristics of CSRR and double CSRRs arrays are studied. With the specification of BPF, the parameters of CSRRs sizes, opening directions and spacing between CSRRs can be obtained, then a dual‐band BPF is realized using four CSRRs array with different opening directions etched on the top metal layer. Since the CSRRs have the sub‐wavelength characteristics, the electrical size of the filter is compact and the size of the filter does not increase. Moreover, the bandwidth of filter can be controlled by adjusting the dimensions of CSRRs and the distances between CSRRs array. As validation, a filter prototype is designed, fabricated, and measured, and the experimental results verify the feasibility of the design.

中文翻译：

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用于紧凑型双宽带带通滤波器设计的基于基片集成波导的互补开口环谐振器及其阵列

在本文中，使用装载有衬底集成波导（SIW）的单环互补开口环谐振器（CSRR）开发了具有双宽带的紧凑型带通滤波器（BPF）。通过在高通SIW滤波器结构上刻蚀具有带阻特性的CSRR，可以实现双宽带响应。研究了CSRR和双CSRR阵列的特性。根据BPF的规范，可以获得CSRR尺寸，开口方向和CSRR之间的间距的参数，然后使用四个在顶部金属层上蚀刻了不同开口方向的CSRR阵列来实现双波段BPF。由于CSRR具有亚波长特性，因此滤波器的电气尺寸紧凑，并且滤波器的尺寸不会增加。此外，滤波器的带宽可以通过调整CSRR的尺寸和CSRR阵列之间的距离来控制。作为验证，设计，制造和测量了过滤器原型，实验结果证明了设计的可行性。