Design of Compact Balanced Filter Using Slow-Wave Half-Mode Substrate Integrated Waveguide

被引：0
|
作者：
Zhu H.-B. [1 ]
Ji L. [1 ]
Li X.-C. [1 ]
Mao J.-F. [1 ]
机构：
[1] Key Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai
来源：
Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2023年 / 51卷 / 10期
关键词：
balanced filter; half-mode substrate integrated waveguide; miniaturization; multimode resonator; slow-wave structure;
D O I：
10.12263/DZXB.20220112
中图分类号：
学科分类号：
摘要：
A compact balanced bandpass filter using just one half-mode substrate integrated waveguide (HMSIW) multimode resonator loaded with slow-wave structure is proposed. The filter is composed of a single-layer HMSIW multimode resonator, two pairs of differential feed lines and an array of metal blind holes. The TESW103, TESW104, and TESW105 modes of the HMSIW multimode resonator operate in differential mode (DM) and TESW102 and TESW106 modes operate in common mode (CM), resulting in the features of wide bandwidth. The introduction of slow-wave structure controls the resonant frequency of different modes, and realizes the filter miniaturization. A prototype is designed with a total size of 1.86λg × 0.34λg, the -3 dB DM fractional bandwidth of 32% at the center frequency of 6.5 GHz, and the -20 dB CM fractional suppression bandwidth of 23%. Compared with the previous HMSIW balanced filter, the circuit area of the proposed filter is reduced by 42%. © 2023 Chinese Institute of Electronics. All rights reserved.
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页码：2739 / 2746
页数：7
相关论文
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