In this paper, a compact substrate integrated waveguide (SIW) based dual-band filter which utilizes the dual resonance provided by asymmetric double-ring D-shaped resonators that are incorporated on the upper metallic layer of SIW is communicated. The two passbands are generated well below the cut-off frequency of the SIW due to evanescent mode propagation. Such propagation is responsible for the substantial miniaturization of the filter as well. Two types of two-pole dual-band filters are designed that exhibit low insertion loss, wide out-of-band-rejection, compact size, easy fabrication and integration with other microwave components. To validate the proposed idea, three filter prototypes working around 2.66 and 3.54 GHz are designed, fabricated for demonstration and experimentally tested. Parametric analysis is performed to verify the dependence of filter parameters on the proposed filter prototype. Expected agreements are achieved between the experimental and simulated results. The proposed filter finds applications in the upcoming 5G sub-6 GHz communication.

在本文中，传达了一种紧凑的基于基片集成波导（SIW）的双带滤波器，该滤波器利用了SIW上部金属层中包含的非对称双环D形谐振器提供的双谐振。由于e逝模式传播，两个通带的产生频率远低于SIW的截止频率。这种传播也导致过滤器的显着小型化。设计了两种类型的两极双频滤波器，它们表现出低的插入损耗，带外抑制范围广，尺寸紧凑，易于制造并与其他微波组件集成在一起。为了验证所提出的想法，设计了三个工作于2.66 GHz和3.54 GHz的滤波器原型，进行了演示和实验测试。执行参数分析以验证滤波器参数对所提出的滤波器原型的依赖性。实验结果和模拟结果之间达成了预期的协议。拟议的滤波器可以在即将到来的5G 6 GHz以下通信中找到应用。