High-selectivity wideband bandpass filter based on quintuple-mode stub-loaded resonator and defected ground structures

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Frequenz Pub Date : 2024-09-18 DOI:10.1515/freq-2024-0104

Yunxiang Zhang, Bin Gu, Zichen Wu, Yicheng Wang, Jixuan Li

引用次数: 0

Abstract

A high-selectivity wideband bandpass filter (BPF) based on a quintuple-mode stub-loaded resonator and defected ground structures (DGSs) is presented. Thanks to the symmetrical topology, the even/odd theory is adopted for analyses. By properly adjusting the stub dimensions, the resonant frequencies of the transmission poles and zeros can be controlled to obtain wide passband and sharp out-of-band rejection performances. The bandwidth of the upper stopband is further extended by introducing a pair of DGSs under the interdigital coupled line feeding structures, and the spurious response rejection is improved by 18.9 dB. A BPF prototype that operates at 6 GHz with a fractional bandwidth (RBW) of 70 % is manufactured for validation. The measured insertion loss and return loss are 1.3 and 17 dB, respectively. The measured out-of-band rejection over DC-2 GHz and 8.8–21 GHz are better than −30 dB.

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基于五重模式存根负载谐振器和缺陷地层结构的高选择性宽带带通滤波器

本文介绍了一种基于五重模式存根负载谐振器和缺陷接地结构（DGS）的高选择性宽带带通滤波器（BPF）。由于采用了对称拓扑结构，因此分析时采用了偶数/奇数理论。通过适当调整存根尺寸，可以控制传输极点和零点的谐振频率，从而获得宽通带和尖锐的带外抑制性能。通过在数字耦合线馈电结构下引入一对 DGS，进一步扩展了上阻带的带宽，并将杂散响应抑制提高了 18.9 dB。为进行验证，制造了一个工作频率为 6 GHz、带宽（RBW）为 70% 的 BPF 原型。测得的插入损耗和回波损耗分别为 1.3 和 17 dB。直流-2 千兆赫和 8.8-21 千兆赫的带外抑制测量值优于-30 分贝。

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

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.