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Wideband dual circularly polarized beam-scanning array for Ka-band satellite communications

Zhang, Long, Gao, Steven, Luo, Qi, Li, Wenting, Li, Qingxia (2017) Wideband dual circularly polarized beam-scanning array for Ka-band satellite communications. Microwave and Optical Technology Letters, 59 (8). pp. 1962-1967. ISSN 0895-2477. (doi:10.1002/mop.30655) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:62106)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
https://doi.org/10.1002/mop.30655

Abstract

This article presents a wideband dual circularly polarized (CP) array which has two independent beams in orthogonal circular polarizations and the two beams can scan to ±23° individually. The proposed array consists of stacked patches fed by 90° hybrid couplers. To achieve two independent beams, the beam-forming networks (BFNs) for the left-hand circular polarization (LHCP) beam and right-hand circular polarization (RHCP) beam are printed on two separate layers with ground plane between them. This arrangement facilitates the integration of the BFNs and reduces the fabrication complexity. Two prototypes with different beam-scanning angles are fabricated and measured. The measured results confirm that the array achieves good impedance matching, larger than 20 dB isolation and smaller than 3 dB axial ratio (AR) from 27 to 30 GHz when the array scans to ±23°. Due to the independent beam-scanning ability, high isolation between the LHCP and RHCP beams and the wide bandwidth, the proposed array is promising for high data-rate Ka-band satellite communications which utilize polarization diversity.

Item Type: Article
DOI/Identification number: 10.1002/mop.30655
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 19 Jun 2017 15:19 UTC
Last Modified: 16 Feb 2021 13:46 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/62106 (The current URI for this page, for reference purposes)
Gao, Steven: https://orcid.org/0000-0002-7402-9223
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