Compact transversal signal-interaction wideband bandpass filter with multiple transmission zeros and wide stopband

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Aeu-International Journal of Electronics and Communications Pub Date : 2024-07-20 DOI:10.1016/j.aeue.2024.155449

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Abstract

In this paper, a compact wideband bandpass filter with multiple transmission zeros and a wide upper stopband is proposed based on the transversal signal-interaction concept. The filter has two transmission paths for signals to travel from the input port to the output port. The wideband bandpass filter is designed with a center frequency of 4.29 GHz (f₀) and a 3-dB fractional bandwidth of 71.3 %. Six transmission zeros from 0 GHz to 4.2 f₀ can be achieved due to the superposition of signals of the two transmission paths and the virtual short effect of open stub. The designed and fabricated wideband bandpass filter is of minimum insertion loss of 0.3 dB, group delay in the passband below 1.1 ns, and upper-sideband rejection up to 18 GHz (4.2 f₀). Additionally, the proposed filter possesses compact size, and the overall circuit only occupies 0.23 λ_g × 0.15 λ_g (λ_g is the guide wave length of 50 Ohm microstrip line at 4.29 GHz). Measurement and simulation results are in good agreement.

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具有多个传输零点和宽阻带的紧凑型横向信号交互宽带带通滤波器

本文基于横向信号交互概念，提出了一种具有多个传输零点和宽上止带的紧凑型宽带带通滤波器。该滤波器有两条传输路径，供信号从输入端口传输到输出端口。宽带带通滤波器的中心频率为 4.29 GHz（f0），3 分频带宽为 71.3%。由于两条传输路径信号的叠加以及开放式存根的虚短效应，可以实现从 0 GHz 到 4.2 f0 的六个传输零点。设计和制造的宽带带通滤波器插入损耗最小为 0.3 dB，通带群延迟低于 1.1 ns，上边带抑制高达 18 GHz（4.2 f0）。此外，该滤波器体积小巧，整个电路仅占 0.23 λg × 0.15 λg（λg 为 50 欧姆微带线在 4.29 GHz 频率下的导波长度）。测量和模拟结果非常吻合。

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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.