Design of Ultra Wideband Filter with Double Notch

LI Jun; ZHANG Yang; LIU Jinxian; HE Xiaochun

doi:10.13756/j.gtxyj.2025.240101

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Design of Ultra Wideband Filter with Double Notch

更新时间：2025-10-15

- Design of Ultra Wideband Filter with Double Notch
- Study on Optical Communications Issue 5, (2025)
- 作者机构：
  
  1.浙江长征职业技术学院　智能技术学院，杭州　310023
  2.广东理工学院　信息技术学院，广东　肇庆　526100
  3.浙江大学　计算机科学与技术学院，杭州　310027
  4.浙江吉利控股集团有限公司，杭州　310000
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2025.240101
  CLC： TN713
- Received：22 May 2024，
  
  Revised：2024-06-03，
  
  Published：10 October 2025
- 稿件说明：
移动端阅览
李君，张杨，刘金仙，等. 一种具有双陷波的超宽带滤波器设计[J]. 光通信研究，2025(5): 240101.

Li J, Zhang Y, Liu J X, et al. Design of Ultra Wideband Filter with Double Notch[J]. Study on Optical Communications, 2025(5): 240101.
李君，张杨，刘金仙，等. 一种具有双陷波的超宽带滤波器设计[J]. 光通信研究，2025(5): 240101. DOI： 10.13756/j.gtxyj.2025.240101.

Li J, Zhang Y, Liu J X, et al. Design of Ultra Wideband Filter with Double Notch[J]. Study on Optical Communications, 2025(5): 240101. DOI： 10.13756/j.gtxyj.2025.240101.

摘要

【目的】

文章旨在提高超宽带（UWB）通信系统的通信质量，并消除来自其他无线窄带通信系统的干扰。为此设计了一款基于新型多模谐振器的UWB滤波器。

【方法】

首先，通过非对称耦合结构和耦合谐振器结构创新性地引入了两个陷波，两个陷波分别位于6.0和7.6 GHz频段，有效屏蔽了C频段与X频段信号对UWB通信系统的潜在干扰；其次，针对扇形多模谐振器难以引入陷波的难题，提出了扇形圆环谐振器与开路线谐振器级联的解决方案，成功实现了陷波功能。

【结果】

通过电磁仿真软件的验证，该UWB滤波器的工作频段为3.68~10.20 GHz，相对带宽超过96%，且在整个工作频段内插入损耗小于1 dB。尤为关键的是，在6.0和7.6 GHz处，滤波器展示了显著的陷波特性，陷波深度均超过-20 dB，显著降低了杂散信号对UWB系统通信质量的潜在影响。

【结论】

文章所设计的UWB滤波器不仅确保了室内UWB系统的通信质量，还通过引入陷波功能有效抑制了外部干扰，为UWB通信系统的稳定运行提供了重要保障。

Abstract

【Objective】

To enhance the communication quality of Ultra Wideband (UWB) systems and eliminate interference from other narrowband wireless services

a novel UWB filter based on a multimode resonator is proposed.

【Methods】

Two rejection notches are introduced innovatively via an asymmetric coupling structure combined with coupled resonators

precisely located at 6.0 and 7.6 GHz to suppress potential C- and X-band interference. To overcome the difficulty of generating notches in conventional sector multimode resonators

a cascaded configuration of a sectorring resonator and an open-circuited stub resonator is devised

successfully realizing the desired notch functionality.

【Results】

Electromagnetic simulations confirm that the filter operates from 3.68~10.20 GHz with a fractional bandwidth exceeding 96% and an insertion loss below 1 dB across the entire band. Critically

deep notches (>-20 dB) are achieved at 6.0 and 7.6 GHz

markedly attenuating spurious signals that could degrade UWB system performance.

【Conclusion】

In summary

the proposed UWB filter not only safeguards indoor UWB communication quality but also effectively suppresses external interference through its dualnotch design

providing a robust solution for reliable UWB system operation.

关键词

Keywords

references

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