High-Order Mode of Spoof Surface Plasmon Polaritons and Its Application in Bandpass Filters

Kai Da Xu, Sen Lu, Ying Jiang Guo, Qiang Chen

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


A bandpass filter (BPF) with a notched band is designed based on the high-order mode of spoof surface plasmon polaritons (SSPPs). The high-efficiency passband is developed from the first high-order mode (Mode 1) of SSPPs. Compared with the fundamental mode having low-pass response, the Mode 1 has the inherent bandpass response; thus, the BPF generated by Mode 1 does not need to add an additional high-pass filtering structure and employ a gradient transition structure for excitation. The Mode 1 of SSPPs can be effectively excited just with a simple trapezoidal transition converting the signals from microstrip line to SSPP waveguide. Moreover, by embedding a U-shaped resonator into the SSPP structure, a BPF with a notched band is constructed, where the location of the notched band will be red-shifted as the length of resonator increases. The measurements of two fabricated prototypes agree with the simulated ones, which verify the feasibility of our design.

Original languageEnglish
Article number9302587
Pages (from-to)269-275
Number of pages7
JournalIEEE Transactions on Plasma Science
Issue number1
Publication statusPublished - 2021 Jan


  • Bandpass filter (BPF)
  • high-order mode
  • notched band
  • spoof surface plasmon polaritons (SSPPs)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


Dive into the research topics of 'High-Order Mode of Spoof Surface Plasmon Polaritons and Its Application in Bandpass Filters'. Together they form a unique fingerprint.

Cite this