J4 ›› 2014, Vol. 41 ›› Issue (1): 53-56.doi: 10.3969/j.issn.1001-2400.2014.01.010

• 研究论文 • 上一篇    下一篇

新型双模方环微带带通滤波器

孙守家;吴边;梁昌洪   

  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:2012-10-20 出版日期:2014-02-20 发布日期:2014-04-02
  • 通讯作者: 孙守家
  • 作者简介:孙守家(1987-),男,西安电子科技大学博士研究生,E-mail: sunshoujia@gamil.com.
  • 基金资助:

    国家高技术研究发展计划(863计划)资助项目(2012AA01A308);国家自然科学基金资助项目(60901031, 61271017)

Novel dual-mode square loop microstrip bandpass filter

SUN Shoujia;WU Bian;LIANG Changhong   

  1. (Science and Technology on Antenna and Microwave Lab., Xidian Univ., Xi'an  710071, China)
  • Received:2012-10-20 Online:2014-02-20 Published:2014-04-02
  • Contact: SUN Shoujia

摘要:

为了减小谐振器的尺寸,提出了一种新型的双模方环谐振器.首先根据谐振结构的对称性,利用奇偶模方法分析了该结构的谐振特性.然后加载了一对开路枝节,通过增加它的长度降低谐振频率,实现谐振器尺寸的小型化.接着,为了改善滤波器的选择特性,利用源和负载耦合引入了新的传输零点.最后,设计并加工了一款工作于中心频率为1.95GHz,3dB分数带宽为37.7%的微带双模带通滤波器.测试与仿真结果吻合良好.

关键词: 双模谐振器, 带通滤波器, 源和负载耦合

Abstract:

This paper presents a novel dual-mode square loop resonator with a compact size. Firstly, the odd-even-mode method is utilized to analyze the resonant property of the proposed resonator since its structure is symmetrical, and the passband center frequency can be easily tuned by changing the lengths of a pair of loaded open-ended stubs. Secondly, source-load coupling is introduced to produce a new transmission zero and improve the passband selectivity. Finally, a microstrip dual-mode bandpass filter (BPF) centering at 1.95GHz with a 3dB fractional bandwidth (FBW) of 37.7% is designed and fabricated. The measured and simulated results in good agreement are presented.

Key words: dual-mode resonator, bandpass filter, source-load coupling

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