中国物理B ›› 2016, Vol. 25 ›› Issue (3): 34101-034101.doi: 10.1088/1674-1056/25/3/034101

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Spoof surface plasmon-based bandpass filter with extremely wide upper stopband

Xiaoyong Liu(刘小勇), Lei Zhu(祝雷), Yijun Feng(冯一军)   

  1. 1. Department of Electronic Engineering, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;
    2. Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
  • 收稿日期:2015-08-05 修回日期:2015-09-29 出版日期:2016-03-05 发布日期:2016-03-05
  • 通讯作者: Lei Zhu, Yijun Feng E-mail:LeiZhu@umac.mo;yjfeng@nju.edu.cn
  • 基金资助:
    Project supported by the Key Grant Project of Ministry of Education of China (Grant No. 313029), the FDCT Research Grant from Macao Science and Technology Development Fund, China (Grant No. 051/2014/A1), and the Multi-Year Research Grant from University of Macau, Macau SAR, China (Grant No. MYRG2014-00079-FST).

Spoof surface plasmon-based bandpass filter with extremely wide upper stopband

Xiaoyong Liu(刘小勇)1,2, Lei Zhu(祝雷)2, Yijun Feng(冯一军)1   

  1. 1. Department of Electronic Engineering, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;
    2. Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
  • Received:2015-08-05 Revised:2015-09-29 Online:2016-03-05 Published:2016-03-05
  • Contact: Lei Zhu, Yijun Feng E-mail:LeiZhu@umac.mo;yjfeng@nju.edu.cn
  • Supported by:
    Project supported by the Key Grant Project of Ministry of Education of China (Grant No. 313029), the FDCT Research Grant from Macao Science and Technology Development Fund, China (Grant No. 051/2014/A1), and the Multi-Year Research Grant from University of Macau, Macau SAR, China (Grant No. MYRG2014-00079-FST).

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摘要： We investigate the guiding modes of spoof surface plasmon polaritons (SPPs) on a symmetric ultra-thin plasmonic structure. From the analysis, we deduce the operating frequency region of the single-mode propagation. Based on this property, a spoof SPPs lowpass filter is then constituted in the microwave frequency. By introducing a transmission zero at the lower frequency band using a pair of stepped-impedance stubs, a wide passband filter is further realized. The proposed filter is fed by a transducer composed of a microstrip line with a flaring ground. The simulated results show that the presented filter has an extremely wide upper stopband in addition to excellent passband filtering characteristics such as low loss, wide band, and high square ratio. A prototype passband filter is also fabricated to validate the predicted performances. The proposed spoof-SPPs filter is believed to be very promising for other surface waveguide components in microwave and terahertz bands.

关键词: spoof surface plasmon polaritons, bandpass filter, stop band, dispersion relation

Abstract: We investigate the guiding modes of spoof surface plasmon polaritons (SPPs) on a symmetric ultra-thin plasmonic structure. From the analysis, we deduce the operating frequency region of the single-mode propagation. Based on this property, a spoof SPPs lowpass filter is then constituted in the microwave frequency. By introducing a transmission zero at the lower frequency band using a pair of stepped-impedance stubs, a wide passband filter is further realized. The proposed filter is fed by a transducer composed of a microstrip line with a flaring ground. The simulated results show that the presented filter has an extremely wide upper stopband in addition to excellent passband filtering characteristics such as low loss, wide band, and high square ratio. A prototype passband filter is also fabricated to validate the predicted performances. The proposed spoof-SPPs filter is believed to be very promising for other surface waveguide components in microwave and terahertz bands.

Key words: spoof surface plasmon polaritons, bandpass filter, stop band, dispersion relation

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 84.40.Az (Waveguides, transmission lines, striplines) 84.40.Dc (Microwave circuits)