Hybrid-coupler-based quasi-reflectionless balanced bandpass filter with all common mode suppression

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-12 DOI:10.1016/j.aeue.2024.155593

Jinlong Wang, Xuehui Guan, Baoping Ren, Shaopeng Wan

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Abstract

Hybrid-coupler-based quasi-reflectionless balanced bandpass filter (BPF) is proposed and demonstrated in this paper. The reflectionless balanced BPF is comprised of two hybrid couplers and a filtering crossover. The filtering crossover is composed by a dual-mode ring resonator coupled with four short-circuited open-loop resonators, which is used to replace the traditional two BPFs for reduction of interference. Hybrid couplers are used for absorbing the reflected interference to the input and output ports. In order to achieve common-mode (CM) suppression, a double-layer structure with the same microstrip configuration on the upper and lower surfaces is adopted. The absorption characteristics of the differential mode (DM) and CM signals are optimized by hybrid couplers with improved ground. A third-order quasi-reflectionless balanced BPF with central frequency of 2.3 GHz and fractional bandwidth of 14 % is designed, fabricated, and measured. The final measured results demonstrate great consistency with the simulated ones.

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基于混合耦合器的全共模抑制准无反射平衡带通滤波器

本文提出并演示了基于混合耦合器的准无反射平衡带通滤波器（BPF）。无反射平衡带通滤波器由两个混合耦合器和一个滤波分频器组成。滤波分频器由一个双模环形谐振器和四个短路开环谐振器组成，用来取代传统的两个 BPF，以减少干扰。混合耦合器用于吸收反射到输入和输出端口的干扰。为了实现共模（CM）抑制，采用了上下表面具有相同微带配置的双层结构。差模（DM）和 CM 信号的吸收特性通过改进接地的混合耦合器得以优化。设计、制造和测量了一个中心频率为 2.3 GHz、分数带宽为 14 % 的三阶准无反射平衡 BPF。最终测量结果与模拟结果非常一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.