In this article, a substrate integrated waveguide (SIW) power divider with tri-section filtering topology is proposed. Two TE₁₀₁-mode SIW cavities and one TE₁₀₂-mode SIW cavity are placed in the upper and lower substrate layers, respectively. Two vertically stacked SIW cavities are excited simultaneously by one section of SIW. The TE₁₀₂-mode SIW cavity is introduced to achieve 180°- phase conversion. And then, two controllable transmission zeros and a wide stopband can be obtained. Finally, a tri-section SIW filtering power divider sample is fabricated using the printed circuit board (PCB) technology; and good agreements are achieved in the measured and simulated S-parameters.

在本文中，提出了一种具有三段滤波拓扑的衬底集成波导 (SIW) 功率分配器。两个TE ₁₀₁模式SIW 腔和一个TE ₁₀₂模式SIW 腔分别放置在上衬底层和下衬底层中。两个垂直堆叠的 SIW 腔同时被一段 SIW 激发。引入TE ₁₀₂模式 SIW 腔以实现 180° 相位转换。然后，可以获得两个可控传输零点和宽阻带。最后，使用印刷电路板 (PCB) 技术制造了一个三段式 SIW 滤波功率分配器样品；在测量和模拟的 S 参数中取得了良好的一致性。