A bandwidth-enhanced planar endfire antenna based on surface waves

You-Feng Cheng, Xiao Ding, Fu-Long Jin and Wei Shao

Journal of Electromagnetic Waves and Applications, 2018, vol. 32, issue 14, 1847-1856

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.

Date: 2018
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DOI: 10.1080/09205071.2018.1476186

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