北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2023, Vol. 46 ›› Issue (4): 1-8.

• 论文 •    下一篇

高选择性吸收式双频平衡带通滤波器的设计

张一凡,吴永乐,汪庆,王卫民   

  1. 北京邮电大学

  • 收稿日期:2022-04-20 修回日期:2022-05-15 出版日期:2023-08-28 发布日期:2023-08-24
  • 通讯作者: 吴永乐 E-mail:ywu@bupt.edu.cn
  • 基金资助:
    国家自然科学基金项目; 中央高校基本科研业务费专项项目; 广东省重点领域研发计划项目

Design of a High-Selectivity Absorptive Dual-Band Balanced Bandpass Filter

ZHANG Yifan, WU Yongle,  WANG Qing,  WANG Weimin   

  • Received:2022-04-20 Revised:2022-05-15 Online:2023-08-28 Published:2023-08-24

摘要: 提出了一种具有宽带共模噪声抑制和吸收性能的高选择性双频平衡带通滤波器通过改变耦合线的阻抗参数可以调节两个通带的中心频率改变耦合线和加载枝节的电长度可以控制传输零点和双通带的带宽通过加载 4 个接地电阻所提滤波器可以实现宽带共模噪声吸收并具有良好的共模噪声抑制性能为了验证所提滤波器的性能加工了一款中心频率为 0.71 GHz 2.37 GHz 的双频平衡带通滤波器实测结果表明该滤波器差模滤波性能良好具有多个传输零点0 ~ 4.04 GHz 频率范围内共模噪声抑制大于 28 dB,0 ~ 3.67 GHz 频率范围内共模噪声吸收大于 10 dB,0 ~ 4.37 GHz 频率范围内共模噪声的吸收率大于 90% ,对于共模噪声的消除具有良好的提升效果

关键词: 共模噪声吸收, 双频平衡滤波器, 共模噪声抑制, 高选择性, 电阻加载

Abstract: A high-selectivity dual-band balanced bandpass filter is proposed, which can achieve wideband common-mode noise suppression and absorption. Two operational frequencies can be adjusted by the impedances of coupled-lines. Transmission zeros and bandwidths can be controlled by changing the electrical lengths of coupled-lines and loaded stubs. The filter can realize the wideband common-mode noise absorption and suppression by loading four grounded resistors. A dual-band balanced bandpass filter centered at 710 MHz and 2.37 GHz is fabricated for demonstration. The measured results indicate that the balanced bandpass filter has good differential-mode filtering performance with multiple transmission zeros. The common-mode suppression is better than 28 dB from 0 to 4.04 GHz. The common-mode noise absorption is better than 10 dB from 0 to 3.67 GHz, and the absorption rate of common-mode noise is greater than 90% from 0 to 4.37 GHz, which indicates significant improvements in term of common-mode noise elimination.

中图分类号: