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2018•Unpublished venueRequires access

A Novel Wideband Omnidirectional Circularly Polarized Antenna

Lei Xi, Yiping Zang, Dong Yang, Huiqing Zhai, Long Li

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Abstract

In this paper, a novel wideband omnidirectional circularly polarized (CP) antenna is proposed. The designed antenna consists of the 2×2 dipoles. The 2×2 dipoles are fed with equal amplitude and phase arranged in circles. And the current directions of the two pairs of opposite dipoles are opposite to each other, which generate the omnidirectional CP. The VSWR of proposed antenna is less than 2 within 4.33GHz-5.38GHz, whose relative bandwidth is 21.6%. The 3-dB axial ratio bandwidth is 4.53-5.84GHz (25.3 %). Due to the omnidirectional radiation of the proposed antenna, the antenna can be used in indoor communications and automotive vehicles mounted antenna.

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What this paper is about

In this paper, a novel wideband omnidirectional circularly polarized (CP) antenna is proposed. The designed antenna consists of the 2×2 dipoles. The 2×2 dipoles are fed with equal amplitude and phase arranged in circles. And the current directions of the two pairs of opposite dipoles are opposite to each other, which generate the omnidirectional CP. The VSWR of proposed antenna is less than 2 within 4.33GHz-5.38GHz, whose relative bandwidth is 21.6%. The 3-dB axial ratio bandwidth is 4.53-5.84GHz (25.3 %). Due to the omnidirectional radiation of the proposed antenna, the antenna can be used in indoor communications and automotive vehicles mounted antenna.

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Available abstract

In this paper, a novel wideband omnidirectional circularly polarized (CP) antenna is proposed. The designed antenna consists of the 2×2 dipoles. The 2×2 dipoles are fed with equal amplitude and phase arranged in circles. And the current directions of the two pairs of opposite dipoles are opposite to each other, which generate the omnidirectional CP. The VSWR of proposed antenna is less than 2 within 4.33GHz-5.38GHz, whose relative bandwidth is 21.6%. The 3-dB axial ratio bandwidth is 4.53-5.84GHz (25.3 %). Due to the omnidirectional radiation of the proposed antenna, the antenna can be used in indoor communications and automotive vehicles mounted antenna.

Key concepts: Omnidirectional antenna, Coaxial antenna, Dipole antenna, Turnstile antenna, Antenna measurement, Radiation pattern, Physics, Monopole antenna

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