Broadband Circularly Polarized Cross-dipole Antenna with Multiple Modes

A broadband circularly polarized (CP) cross-dipole antenna with multiple modes is proposed. The antenna is composed of two pairs of crossed strip dipoles as driven elements, four square-slot patches, and four corner-truncated patches as parasitic elements. A pair of vacant-quarter printed rings is u...

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Bibliographic Details
Published in:IEEE access 2020-01, Vol.8, p.1-1
Main Authors: Wang, Lei, Fang, Wen-Xiao, Shao, Wei-Heng, Yao, Bin, Huang, Yun, En, Yun-Fei
Format: Article
Language:English
Subjects:
Antenna design
Antenna measurements
Antennas
Bandwidth
Bandwidths
Broadband
Broadband antennas
Broadband communication
Circular polarization
circularly polarized (CP)
Columns (structural)
cross-dipoles
Dipole antennas
Metals
parasitic elements
Parasitic elements (antennas)
sequentially rotated configuration
Strip
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Summary:A broadband circularly polarized (CP) cross-dipole antenna with multiple modes is proposed. The antenna is composed of two pairs of crossed strip dipoles as driven elements, four square-slot patches, and four corner-truncated patches as parasitic elements. A pair of vacant-quarter printed rings is used as sequential phase feeding structure to generate a CP mode, which connect to crossed strip dipoles. By using these coupled rotated elements, multiple CP modes can be stimulated to satisfy the need of broadband CP radiation. In addition, four shorted square metal columns are also introduced in the antenna design to generate an additional CP resonance. A verified prototype was fabricated and measured in this paper. The measured results demonstrate the proposed antenna features wideband CP characteristics with a wide impedance bandwidth (IBW) of 95.5% (0.92-2.60 GHz) and a broad axial-ratio bandwidth (ARBW) of 94.4% (0.95-2.65 GHz).
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.2981050