J4 ›› 2010, Vol. 37 ›› Issue (5): 884-887.doi: 10.3969/j.issn.1001-2400.2010.05.019

• 研究论文 • 上一篇    下一篇

一种新型的微带三通带滤波器设计

赖鑫;梁昌洪;李良;温海宾   

  1. (西安电子科技大学 天线与微波技术重点实验室,陕西 西安  710071)
  • 收稿日期:2009-10-03 出版日期:2010-10-20 发布日期:2010-10-11
  • 作者简介:赖鑫(1983-),男,西安电子科技大学博士研究生,E-mail: xlai@mail.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(60501023, 60901031)

Design of a novel microstrip tri-band filter

LAI Xin;LIANG Chang-hong;LI Liang;WEN Hai-bin   

  1. (Key Lab. of Antennas and Microwave Technology, Xidian Univ., Xi'an  710071, China)
  • Received:2009-10-03 Online:2010-10-20 Published:2010-10-11

摘要:

针对微带三通带滤波器设计中的通带独立性不足、调节不便等问题,提出一种基于枝节加载谐振器(SLR)和缺陷阶梯阻抗谐振器(DSIR)的三通带滤波器设计方法.该方法利用SLR和DSIR分别实现独立的双通带和单通带滤波器设计,并采用可调T型馈线实现通带的输入输出耦合.该方法具有通带独立、设计简单和结构紧凑等特点.设计并加工出可同时工作于2.45/3.5/5.25GHz的微带三通带滤波器,测试与仿真结果吻合良好.

关键词: 三通带滤波器, 枝节加载谐振器, 缺陷阶梯阻抗谐振器, T型馈线

Abstract:

Considering the pass-band independent of the traditional tri-band filter, a novel method is proposed, which is based on the stub loaded resonator(SLR) and defected stepped impedance resonator(DSIR). The three pass-bands are independently designed via the SLR and DSIR, the Qe of which is adjusted by the T-shaped feed line. This filter is characterized by independent pass-band design, fast design and a compact size. A tri-band filter with three pass-bands centering at 2.45/3.5/5.25GHz is designed and fabricated. Measured results and simulation results are in good agreement.

Key words: tri-band filter, stub-loaded resonator (SLR), defected ground structure resonator(DSIR), T-shaped feed line