具有平坦通带、高选择性和增强带外抑制的无反射带通滤波器

陈玮; 吴文亮; 夏明汕; 黄梦醒

doi:10.11959/j.issn.1000-436x.2026064

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具有平坦通带、高选择性和增强带外抑制的无反射带通滤波器

学术论文 | 更新时间：2026-05-07

- 具有平坦通带、高选择性和增强带外抑制的无反射带通滤波器
- Reflectionless bandpass filter with flat passband, high selectivity, and enhanced out-of-band suppression
- 通信学报 2026年47卷第4期页码：204-213
- 作者机构：
  
  海南大学信息与通信工程学院，海南海口 570228
- 作者简介：
  
  [ "陈玮（1992- ），男，海南临高人，博士，海南大学副教授、博士生导师，主要研究方向为B5G/6G技术、集成电路芯片设计等。" ]
  [ "吴文亮（1999- ），男，海南海口人，海南大学硕士生，主要研究方向为滤波器电路设计、集成电路芯片设计等。" ]
  [ "夏明汕（2001- ），男，河南信阳人，海南大学硕士生，主要研究方向为集成电路芯片设计等。" ]
  [ "黄梦醒（1973- ），男，河南信阳人，博士，海南大学教授、博士生导师，主要研究方向为海洋信息感知与处理技术、大数据与人工智能等。" ]
- 基金信息：
  
  国家自然科学基金资助项目(62504065;62464005);海南省科技重大项目(ZDKJ2021022)
- DOI：10.11959/j.issn.1000-436x.2026064
  中图分类号： TN713
- 收稿：2026-01-03，
  
  修回：2026-03-10，
  
  录用：2026-03-11，
  
  纸质出版：2026-04-20
- 稿件说明：
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陈玮,吴文亮,夏明汕等.具有平坦通带、高选择性和增强带外抑制的无反射带通滤波器[J].通信学报,2026,47(04):204-213.

Chen Wei,Wu Wenliang,Xia Mingshan,et al.Reflectionless bandpass filter with flat passband, high selectivity, and enhanced out-of-band suppression[J].Journal on Communications,2026,47(04):204-213.
陈玮,吴文亮,夏明汕等.具有平坦通带、高选择性和增强带外抑制的无反射带通滤波器[J].通信学报,2026,47(04):204-213. DOI： 10.11959/j.issn.1000-436x.2026064.

Chen Wei,Wu Wenliang,Xia Mingshan,et al.Reflectionless bandpass filter with flat passband, high selectivity, and enhanced out-of-band suppression[J].Journal on Communications,2026,47(04):204-213. DOI： 10.11959/j.issn.1000-436x.2026064.

摘要

当前，无反射滤波器的设计面临选择性不足与通带平坦度欠佳等挑战。为此，提出一种双端口微带线无反射带通滤波器拓扑结构，旨在为解决上述难题提供设计参考。该微带电路拓扑由两段平行耦合微带线通过短路支节连接构成，并联一组对称的带阻滤波器，利用其内部电阻吸收无法传输的信号。通过对含传输零点的集总元件滤波器进行分析与转换，实现了具有高选择性的微带带通滤波器。此外，提出的设计流程能够适配不同中心频率与带宽要求，相较于其他设计方法具有更高的灵活性。为验证该设计，制造了中心频率为2.5 GHz的微带带通滤波器。测试结果表明，3 dB带宽为960 MHz（相对带宽38.4%），兼具高选择性与平坦的通带响应；10 dB反射带宽达203%，带外抑制超过30 dB。

Abstract

Currently

the design of reflectionless filters was challenged by insufficient selectivity and insufficient flatness. Therefore

a two-port microstrip reflectionless bandpass filter topology was proposed to provide a reference for addressing these challenges. The topology of this microstrip circuit was composed of two parallel coupled microstrip lines connected by two short stubs

along with a pair of symmetrical bandstop filter (BSF) connected in parallel

where resistors were used to absorb signals that cannot be transmitted. By analyzing and converting the lumped-element filter with transmission zeros

a microstrip bandpass filter with high selectivity was achieved. Furthermore

the proposed design process could be adapted to meet different requirements for center frequency and bandwidth

offering greater flexibility compared to other design methods. To validate this design

a microstrip bandpass filter with a center frequency of 2.5 GHz was developed. The measurement results indicate that the 3 dB bandwidth is 960 MHz (fractional bandwidth 38.4%)

and high selectivity along with a flat passband response are exhibited. The BPF exhibits a 10 dB reflection bandwidth of 203% and an out-of-band rejection of more than 30 dB.

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Keywords

references

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