In this letter, high-selective bandpass filters, in the printed ridge gap waveguide technology, are presented. The filters are designed to perform 4.68% fractional bandwidth at center frequency $f_{0}$ = 24.78 GHz. In the proposed filters, to obtain high selectivity, a cross-coupling between the nonadjacent resonators and also a coupling between the input and output ports to create an extra pair of transmission zeros in the transfer function of the filters are used. Finally, the filters are fabricated, and their scattering parameters are measured to verify the simulation results.

中文翻译：

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使用源负载和交叉耦合的高选择性印脊间隙波导滤波器的设计

在这封信中，介绍了采用印刷脊间隙波导技术的高选择性带通滤波器。滤波器设计用于在中心频率处执行 4.68% 的分数带宽 $f_{0}$ = 24.78 GHz。在所提出的滤波器中，为了获得高选择性，使用了非相邻谐振器之间的交叉耦合以及输入和输出端口之间的耦合，以在滤波器的传递函数中创建一对额外的传输零点。最后，制作滤波器，并测量其散射参数以验证模拟结果。