http://orcid.org/0000-0002-2370-7194
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ABSTRACT
A low-profile linearly polarized patch antenna using metasurface is proposed for wideband operation at 5-GHz Wi-Fi bands. The antenna is comprised of a rectangle patch sandwiched between a lattice of 3 × 3 periodic metasurface and the ground plane. The adopted coaxial probe feed is easy to fabricate and match. Characteristic mode analysis (CMA) is utilized to explain and understand the working mechanism of the proposed antenna. It is found that two dominant characteristic modes are well excited, leading to the broadband operation and linearly polarized radiation. The proposed dielectric-filled antenna with a low profile of 0.057λ0 (λ0 is the operating wavelength at 5.7 GHz in free space) attains about 30% measured −10 dB impedance bandwidth (4.89–6.62 GHz) with 7.28 dBi average gain. Across the bandwidth, the antenna efficiency is greater than 90%, and cross-polarization levels are less than 18 dB.
ORCID
Zhipeng Liang http://orcid.org/0000-0002-2370-7194
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Notes on contributors
Zhipeng Liang
Zhipeng Liang is currently working toward the PhD degree in electromagnetic field and microwave technology at the University of Electronic Science and Technology of China (UESTC). His current research interests include characteristic mode theory (CMT) and antenna array optimization.
Jun Ouyang
Jun Ouyang is currently a professor of the School of Electronic Science and Engineering, UESTC. His research interests include antenna theory and computational electromagnetics.
Feng Yang
Feng Yang is currently a professor of the School of Electronic Science and Engineering, UESTC. His research interests include antenna theory and techniques, electromagnetic scattering and inverse scattering, and UWB communication.