电信科学 ›› 2011, Vol. 27 ›› Issue (8): 79-83.doi: 10.3969/j.issn.1000-0801.2011.08.019

• 研究与开发 • 上一篇    下一篇

双阻带单负介质在带通滤波器中的应用

曹卫平1,2,林光华1,李思敏2,刘慧涓1   

  1. 1 桂林电子科技大学信息与通信学院 桂林 541004
    2 电子科技大学应用物理研究所 成都 610054
  • 出版日期:2011-08-15 发布日期:2011-08-15
  • 基金资助:
    国家自然科学基金资助项目

Applications of Dual-Reject-Bands Single Negative Metamaterials in Band-Pass Filter Design

Weiping Cao1,2,Guanghua Lin1,Simin Li2,Huijuan Liu1   

  1. 1 School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China
    2 Institute of Applied Physics,University of Electronic Science and Technology of China,Chengdu 610054,China
  • Online:2011-08-15 Published:2011-08-15

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摘要：

提出一种具有双阻带特性的单负介质并据此设计出小型化高性能的带通滤波器。首先对该单负介质单元进行等效电路分析并利用散射矩阵进行等效磁导率的提取，揭示了该异向介质单元的带阻工作原理和验证了其等效电路分析的合理性；然后在此基础上研究介质单元的结构参数对其传输性能的影响，据此设计出中心频率为10 GHz的带通滤波器具有非常紧凑的尺寸（25 mm×22.86 mm×10.16 mm）以及具有小于0.16 dB的通带损耗和良好的阻带抑制性能，这是常规介质滤波器所无法比拟的。

关键词: 双阻带, 单负介质, y型谐振器, 等效磁导率, S参数提取, 波导带通滤波器

Abstract:

A novel single negative metamaterials with dual reject-bands is proposed.Based on the analysis of the equivalent circuit model of the metamaterials unit cell and the extraction of its electromagnetic parameters using the S-parameter retrieval method，the band-stop characteristic of the metamaterials and the validity of the equivalent circuit model are demonstrated.And then the impacts of the structural parameters are investigated.By utilizing the metamaterials a waveguide band-pass filter is designed at the center frequency of 9.6 GHz，which has its advantages with compacter size（25 mm ×22.86 mm ×10.16 mm），higher selectivity and lower transmission loss（0.15 dB），comparing with the ones based on ordinary material.

Key words: dual reject-band, single negative metamaterial, y-shaped resonator, effective permeability, S-parameter retrieval method, waveguide band-pass filter

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