Design of Novel Wideband Circularly Polarized Antenna Based on Vivaldi Antenna Structure

This letter presents a novel compact wideband circularly polarized antenna by utilizing Vivaldi antenna structure as the design concept. The proposed antenna consists of four exponentially tapered patches, a circular metal wall and a feed network. Four tapered patches are sequentially rotated and ve...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2015, Vol.14, p.1662-1665
Main Authors: Hu, Yong-Jin, Qiu, Zhi-Mo, Yang, Bo, Shi, Shu-Jie, Yang, Jian-Jun
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna measurements
Bandwidth
Broadband antennas
Circular polarization (CP)
Slot antennas
slot coupled feed technique
Vivaldi antennas
wideband antennas
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Summary:This letter presents a novel compact wideband circularly polarized antenna by utilizing Vivaldi antenna structure as the design concept. The proposed antenna consists of four exponentially tapered patches, a circular metal wall and a feed network. Four tapered patches are sequentially rotated and vertically located in the circular metal wall which acts as a vertical ground plane. Slot-coupled feed technique is applied to feed the antenna. Feeding by a corporate feed network, wide impedance bandwidth and axial ratio bandwidth are achieved. Parametric studies are made to optimize the antenna. The experimental results show that the antenna exhibits a 3-dB AR bandwidth of 41.4% (3.45-5.25 GHz) and a 10-dB impedance bandwidth of 57.3% (3.06-5.52 GHz).
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2015.2417355