Ho Min-Hua, Hsu Chung-I G, Tang Kun-Hua, Hong Wanchu
Department of Electronic Engineering, National Changhua University of Education, Changhua City 50074, Taiwan.
Department of Electrical Engineering, National Yunlin University of Science and Technology, Douliou City 64002, Taiwan.
Micromachines (Basel). 2022 Feb 28;13(3):389. doi: 10.3390/mi13030389.
The contribution of this work is to propose a half-mode substrate integrated coaxial resonator (HMSICR) and its application in bandpass filter (BPF) design. The proposed HMSICR is formed by evenly bisecting a square substrate integrated coaxial resonator (SICR), which is a cavity composed of two dielectric substrates and three metal layers. The SICR's sidewalls are mimicked by periodically spaced thru-via arrays, and a circular patch is embedded in the middle metal layer of the SICR with the patch shorted to the cavity's bottom wall by a circular array of blind vias. This HMSICR can drastically lower the cavity's resonance frequency. The achieved frequency reduction rate of the proposed HMSICR, as compared with that of its conventional substrate integrated waveguide (SIW) cavity counterpart, reaches 70%. A sample four-HMSICR BPF is built for the circuit verification measurement. To further reduce the sample filter's area, the composing HMSICRs are vertically stacked in a back-to-back configuration. We believe that its obtained size-reduction rate reaches the highest record.
这项工作的贡献在于提出了一种半模基片集成同轴谐振器（HMSICR）及其在带通滤波器（BPF）设计中的应用。所提出的HMSICR是通过将方形基片集成同轴谐振器（SICR）均匀地一分为二而形成的，SICR是一个由两个介质基片和三个金属层组成的腔体。SICR的侧壁由周期性间隔的通孔阵列模拟，并且在SICR的中间金属层中嵌入一个圆形贴片，该贴片通过圆形盲孔阵列与腔体的底壁短路。这种HMSICR可以大幅降低腔体的谐振频率。与传统的基片集成波导（SIW）腔体相比，所提出的HMSICR实现的频率降低率达到70%。构建了一个四HMSICR BPF样本用于电路验证测量。为了进一步减小样本滤波器的面积，组成HMSICR的部分以背对背配置垂直堆叠。我们认为其获得的尺寸减小率达到了最高记录。
