Low-Cost Low-Loss Tunable Dual-Band Filter Using Coupled Lines With Variable Coupling Coefficients

IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-09-26 DOI:10.1155/2024/5668593
Wang Qunliang, Jiang Yanfeng, Wang Yanxiong
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Abstract

A novel low-loss tunable filter using its own coupled lines is proposed in the paper. The filter is based on a substrate-integrated suspended line (SISL) structure with two inner layers, fabricated on a low-cost FR4 substrate. The suspension line and the cavity are completely covered by copper. In the novel structure, the coupled line can be tuned and has a variable coupling coefficient. The performance of the dual-band filter can be flexibly tuned by using the coupled lines. The passband widths can be tuned independently with the range from 0.31 to 0.92 GHz. The center frequencies of the passbands can also be tuned independently, with the tuning range of 1.1 GHz. A low insertion loss of less than 0.54 dB is shown in the proposed filter. The proposed filter shows potential application in future tunable microwave circuit.

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使用耦合系数可变的耦合线的低成本低损耗可调双频滤波器
本文提出了一种利用自身耦合线的新型低损耗可调滤波器。该滤波器基于基板集成悬浮线(SISL)结构,有两个内层,制作在低成本的 FR4 基板上。悬浮线和空腔完全由铜覆盖。在这种新型结构中,耦合线可以调整,并具有可变的耦合系数。通过使用耦合线,可以灵活地调整双频滤波器的性能。通带宽度可在 0.31 至 0.92 GHz 范围内独立调整。通带的中心频率也可独立调整,调整范围为 1.1 GHz。该滤波器的插入损耗小于 0.54 dB。该滤波器有望应用于未来的可调谐微波电路。
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来源期刊
CiteScore
4.00
自引率
23.50%
发文量
489
审稿时长
3 months
期刊介绍: International Journal of RF and Microwave Computer-Aided Engineering provides a common forum for the dissemination of research and development results in the areas of computer-aided design and engineering of RF, microwave, and millimeter-wave components, circuits, subsystems, and antennas. The journal is intended to be a single source of valuable information for all engineers and technicians, RF/microwave/mm-wave CAD tool vendors, researchers in industry, government and academia, professors and students, and systems engineers involved in RF/microwave/mm-wave technology. Multidisciplinary in scope, the journal publishes peer-reviewed articles and short papers on topics that include, but are not limited to. . . -Computer-Aided Modeling -Computer-Aided Analysis -Computer-Aided Optimization -Software and Manufacturing Techniques -Computer-Aided Measurements -Measurements Interfaced with CAD Systems In addition, the scope of the journal includes features such as software reviews, RF/microwave/mm-wave CAD related news, including brief reviews of CAD papers published elsewhere and a "Letters to the Editor" section.
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