半圆形谐振器双频带带阻滤波器的研制

Compact Dual-band Band-stop Filter Using Semicircle Resonator

为了抑制干扰信号,基于半圆形谐振器设计了双频带带阻滤波器。该滤波器由两个半圆形谐振器和部分耦合微带线组成。基于HFSS对双频带带阻滤波器进行仿真,同时制作并且测试了双频带带阻滤波器。仿真结果和测试结果基本上一致。测试结果显示,该双频带带阻滤波器在阻带外存在三个反射零点,改进了滤波器的选择特性。滤波器具有体积小、选择性高、结构简单等优点。

In order to suppress interference signal, a novel dual-band band-stop filter with the semicircle resonator is proposed. The simulated results of the proposed dual-band band-stop filter are obtained based on HFSS. The proposed dual-band band-stop filter is fabricated and tested. The simulated results are in good agreement with the measured ones. The measured results show that the proposed dual-band band-stop filter has three reflection zeros outside the stop band and the selection characteristic of the proposed filter is improved. The proposed filter has many advantages, such as small area, high selectivity, and simple structure.