This letter proposes a novel trisection filter by stacking three substrate-integrated waveguide (SIW) cavities vertically. The trisection topology can be divided into two cascaded second-order topologies in the vertical direction, which can make the filter structure more compact. Moreover, two transmission zeros can be controlled independently by changing the signs of coupling coefficients between the adjacent stacked SIW cavities. Finally, a third-order filter sample is fabricated using printed circuit board (PCB) technology, and the measured S-parameters have good agreement with the simulated ones.

中文翻译：

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具有可控传输零点的垂直堆叠三等分 SIW 滤波器


这封信提出了一种新颖的三等分滤波器，通过垂直堆叠三个基板集成波导（SIW）腔。三等分拓扑可以在垂直方向上分成两个级联的二阶拓扑，可以使滤波器结构更加紧凑。此外，可以通过改变相邻堆叠SIW腔之间的耦合系数的符号来独立控制两个传输零点。最后，利用印刷电路板（PCB）技术制作了三阶滤波器样品，测量的S参数与仿真的S参数具有良好的一致性。