电子元件与材料2025，Vol.44Issue(4)：402-407,6.DOI:10.14106/j.cnki.1001-2028.2025.1574
一种准无反射带阻滤波器
A quasi-reflectionless band-stop filter
摘要
Abstract
A design method for a novel quasi-reflectionless band-stop filter with a simple structure was proposed to address the issue of signal reflection,which adversely affects system performance.The filter consists of a main channel and an absorption channel.The main channel was designed as a T-shaped band-stop filter,while the absorption channel was formed by a quarter-wavelength open-circuit resonator and an absorption resistor connected in series.Based on the principle of the input impedance matching,the band-stop filter in the main channel was first designed,and the passband bandwidth of the absorption channel was then determined according to the stopband bandwidth of the main channel filter.This design ensures complete absorption of the stopband energy.To validate the proposed method,a microstrip filter with a center frequency of 3 GHz and-3 dB relative stopband bandwidth of 65％was fabricated and tested with HFSS simulations and physical prototype measurements.The simulation and experimental results demonstrate excellent agreement,the passband insertion loss is less than 0.5 dB,the stopband return loss exceeds-11 dB,and the absorption efficiency is greater than 92％.The final physical dimensions of the filter are 2.22λg×1.12λg,which meets the miniaturization requirement.关键词
准无反射滤波器/带阻滤波器/HFSS/阻抗匹配Key words
quasi-reflectiionless filter/band stop filter/HFSS/impedance matching分类
信息技术与安全科学引用本文复制引用
张杨,杨泽..一种准无反射带阻滤波器[J].电子元件与材料,2025,44(4):402-407,6.基金项目
广东理工学院科技项目-人工智能(2024KDZK001) （2024KDZK001）
广东理工学院科技项目(2024YBZK009) （2024YBZK009）
