Design of a Broadband Radome-Enclosed Dual-Polarization Antenna Array Covering Sub-6 GHz Band with Differential Feeding

A differentially fed dual-polarized antenna with low cross-polarization is proposed for sub-6 GHz applications. The main patch is fed through two pairs of symmetrical ports, and annular-ring slits are etched around the feedings. The broadband 180° phase shifter provides a stable differential feeding...

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Bibliographic Details
Published in:International journal of antennas and propagation 2020, Vol.2020 (2020), p.1-17
Main Authors: An, Zhirong, He, Mang
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Bandwidths
Broadband
Dual polarization (waves)
Impedance
Musical performances
Parasitic elements (antennas)
Phase shifters
Polarization
Radomes
Slits
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Summary:A differentially fed dual-polarized antenna with low cross-polarization is proposed for sub-6 GHz applications. The main patch is fed through two pairs of symmetrical ports, and annular-ring slits are etched around the feedings. The broadband 180° phase shifter provides a stable differential feeding structure, and a 1 mm thick radome with a parasitic patch printed on its inner surface is utilized to expand the impedance bandwidth. The impedance bandwidth of the proposed antenna ranges from 3.3 to 6.0 GHz, covering the entire sub-6 GHz band. The 4-element antenna array features low profile, wide bandwidth, low cross-polarization level, and stable gain over the entire operating band. The prototype of the antenna array is fabricated and measured, and the design is well validated by experimental results.
ISSN:1687-5869
1687-5877
DOI:10.1155/2020/8881317