Multi-band propagation of spoof surface plasmon polaritons by its high-order modes. (1st July 2022)

• Record Type: Journal Article
• Authors: Zhu, Shuangshuang; Wen, Pin; Liu, Yuhuai
• Is Part Of: Japanese journal of applied physics. Volume 61:Number 7(2022)
• Publication Date: 2022-07-01
• Subjects: spoof surface plasmon polaritons -- multi-band -- high-order mode -- complementary split-ring resonator (CSRR); Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/ac748f
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Compact dual-band and tri-band bandpass filters (BPFs) based on high-order modes of spoof surface plasmon polaritons (SSPPs) are proposed. By using the meander line technique, the electrical size of the proposed SSPP structure was reduced by 68% compared with the traditional rectangular-grating SSPP structure. The high-efficiency passbands are excited by high-order modes of SSPPs. Therefore, dual-band and tri-band BPFs are designed by using two and three high-order modes of SSPPs, respectively. In addition, a notched band is obtained by loading three complementary split-ring resonators (CSRRs) on the bottom layer of the tri-band BPF. Thus, a quad-band BPF is achieved.