上海大学学报(自然科学版) ›› 2012, Vol. 18 ›› Issue (4): 331-334.doi: 10.3969/j.issn.1007-2861.2012.04.001

• 通信与信息工程 •    下一篇

采用折叠型阶跃阻抗谐振器的新颖双频带带通滤波器

马德臣,肖中银,相亮亮,黄春艳,寇鑫,吴效环   

  1. (上海大学 通信与信息工程学院,上海 200072)
  • 出版日期:2012-08-30 发布日期:2012-08-30
  • 通讯作者: 肖中银(1964~),男,副教授,博士,研究方向为微波与毫米波电路等. E-mail:zhyxiao@staff.shu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(61077068);上海市自然科学基金资助项目(10ZR1411900);上海市重点学科建设资助项目(S30108);上海市科委重点实验室资助项目(08DZ2231100)

Compact Dual-Band Bandpass Filter Using Folded Stepped Impedance Resonator

MA De-chen,XIAO Zhong-yin,XIANG Liang-liang,HUANG Chun-yan,KOU Xin,WU Xiao-huan   

  1. (School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China)
  • Online:2012-08-30 Published:2012-08-30

摘要: 设计一种新颖的双频带带通滤波器(bandpass filter,BPF),可应用于无线局域网(wireless local area network,WLAN) IEEE 802.11 b/a (2.4/5.2 GHz).该滤波器是由折叠的阶跃阻抗谐振器(stepped impedance resonator,SIR)外加2个枝节构成,并具有一个传输零点.该滤波器的2个通带分别由折叠型SIR的基频和一次杂散频率产生.为了满足输入和输出阻抗匹配的要求,改善双频段的通带性能,采用零度馈电方式.仿真结果显示,2个频带在2.4/5.2 GHz时的3 dB相对带宽分别为6.3%和3.4%.测量结果和仿真结果基本吻合.

关键词: 带通滤波器, 阶跃阻抗谐振器, 双频带

Abstract: A novel compact dualband bandpass filter (BPF) is designed for applications of wireless local area network (WLAN) IEEE 802.11 b/a (2.4/5.2 GHz). The filter is composed of folded stepped impedance resonators (SIRs) and two stubs with one transmission zero. The two passbands are centered at the basic resonant frequency and the firstorder spurious frequency. To match the input and output impedances and improve performance of the two passbands, a tapline is used to feed the coupling resonator at zero degree. Simulation results show that the two center frequencies are located at the desired 2.4 and 5.2 GHz with 3 dB fractional bandwidths of  6.3% and 3.4%, respectively. The measured results are in general agreement with the simulation results.

Key words: bandpass filter (BPF), dual-band, stepped impedance resonator (SIR)

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