volume | PIER Journals

2017-01-18

Low-Profile Omnidirectional Antenna with Dual Polarizations for 2.4 GHz WLAN Applications

Li Sun,

Dr. Li Sun

National Laboratory of Science and Technology on Antennas and Microwaves

Xidian University

China

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Bao-Hua Sun,

Dr. Bao-Hua Sun

Xidian University

China

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Guanxi Zhang

Dr. Guanxi Zhang

National Key Laboratory of Antennas and Microwave Technology

Xidian University

China

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Progress In Electromagnetics Research Letters, Vol. 65, 89-94, 2017

doi:10.2528/PIERL16112302

Abstract

A low-profile antenna is proposed in this letter for realizing dual polarizations with omnidirectional radiation patterns. Vertical polarization is obtained by a modified annular ring slot antenna, and horizontal polarization is obtained by a modified printed arc dipole array. By combining the ground plane of the ring slot antenna and the dipole array on the same layer, the profile of the antenna is reduced to minimum extent. The proposed prototype has a low profile of 0.024λ0 (λ0 is the free-space wavelength at 2.4 GHz). To verify the design, the proposed antenna is fabricated and measured. Measured reflection coefficients, isolation, and radiation patterns results agree well with the simulated data. The common band of vertical and horizontal polarizations makes the proposed antenna satisfy the WLAN diversity systems with omnidirectional characteristic.

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Li Sun, Bao-Hua Sun, and Guanxi Zhang, "Low-Profile Omnidirectional Antenna with Dual Polarizations for 2.4 GHz WLAN Applications," Progress In Electromagnetics Research Letters, Vol. 65, 89-94, 2017.
doi:10.2528/PIERL16112302

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