A bandwidth-enhanced planar endfire antenna based on surface waves. Issue 14 (22nd September 2018)

• Record Type: Journal Article
• Authors: Cheng, You-Feng; Ding, Xiao; Jin, Fu-Long; Shao, Wei
• Is Part Of: Journal of electromagnetic waves and applications. Volume 32:Issue 14(2018)
• Page Start: 1847
• Page End: 1856
• Publication Date: 2018-09-22
• Subjects: Band enhancement -- eigenvalue analysis -- endfire antenna -- surface waves; Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2018.1476186
• Languages: English
• ISSNs: 0920-5071

Abstract

ABSTRACT: A surface-wave-based endfire antenna with an enhanced impedance bandwidth is presented in this paper. The antenna consists of a surface-wave guide (SWG) and five strips printed on the SWG. The endfire radiation benefits from the surface-wave diffraction of the SWG which is investigated with the Snell's law, effective surface impedance and eigenvalue analysis. A prototype is fabricated and measured, and the measured results indicate that the antenna has two resonances and its bandwidth is enhanced up to 16.1% (4.0–4.73 GHz). The proposed endfire antenna also exhibits high gain, good gain flatness, low cross-polarization level and low profile.