A planar strongly confined spoof surface plasmonic waveguide with compact cells. Issue 12 (13th August 2019)

• Record Type: Journal Article
• Authors: Wan, Ye; Wang, Xiao-Hua; Wang, You-Cheng
• Is Part Of: Journal of electromagnetic waves and applications. Volume 33:Issue 12(2019)
• Page Start: 1652
• Page End: 1659
• Publication Date: 2019-08-13
• Subjects: Dispersion -- electromagnetic field confinement -- periodic structure -- spoof surface plasmon polaritons (SSPPs); Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2019.1627250
• Languages: English
• ISSNs: 0920-5071

Abstract

ABSTRACT: A new planar waveguide structure, based on spoof surface plasmon polaritons (SSPPs), is proposed featuring compact size, low loss, and good subwavelength field confinement. Compared with the rectangular- and trapezoidal-type cells in the conventional spoof surface plasmonic waveguides (SSPWs), the proposed cell has 50.7% and 27.8% size reduction at the same cut-off frequency, respectively. Moreover, the simulated electrical field distributions show that there are good improvements in the field enhancement and subwavelength confinement. To further validate the transmission characteristics of the proposed waveguide, coplanar waveguide (CPW) and corresponding transition structures are used to get a high efficient mode conversion. A CPW-SSPW-CPW structure on a dielectric board is designed, fabricated, and measured in the microwave region. Good agreement is achieved between the simulated and measured results. The last results show that the proposed waveguide has low insertion loss and flat group delay in an ultra-wideband from 2.4 to 10.3 GHz.