A Wide-Band Antenna with Circular Polarization Utilizing a U-Shaped Radiator and Parasitic Strip for Wireless Communications

A circularly polarized (CP) and wide-band monopole antenna with a miniaturized size is suggested in this study. The suggested structure is composed of a U-shaped radiator on the front side, a partial ground plane with two rectangle slots, and a quadrilateral-shaped parasitic strip on the back side o...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-06, Vol.14 (7), p.1308
Main Authors: Yousef, Basma M, Ameen, Allam M, Alanazi, Meshari D, Rajagopal, Maheswar, Ibrahim, Ahmed A
Format: Article
Language:English
Subjects:
Antennas
Antennas (Electronics)
Bandwidths
Circular polarization
circular polarization (CP)
compact antenna
Design and construction
Electromagnetic waves
Ground plane
Mobile communication systems
Monopole antennas
Parasitic elements (antennas)
Polarization
Quadrilaterals
Radiators
Radio frequency identification
Rectangles
Satellite communications
Strip
Substrates
Ultrawideband
UWB
Wireless communication systems
Wireless communications
wireless systems
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Summary:A circularly polarized (CP) and wide-band monopole antenna with a miniaturized size is suggested in this study. The suggested structure is composed of a U-shaped radiator on the front side, a partial ground plane with two rectangle slots, and a quadrilateral-shaped parasitic strip on the back side of the FR4 substrate. A wide-band operation with ≤ -10 dB was achieved by regulating the radiator and the partial ground that was placed on the second side of the antenna substrate. The CP was achieved when excited two modes with the same amplitude and a 90° phase difference. This could be generated by regulating the slots' dimensions in the ground plane. Moreover, a quadrilateral-shaped parasitic strip placed on the second side with the partial ground was utilized to extend the 3 dB axial ratio (AR) bandwidth. The suggested structure is simulated, prototyped, and measured to confirm the desired requirements with a total size of 30 × 32 mm (0.4 × 0.42 λ at 4 GHz). The tested outcomes have a bandwidth of ≤ -10 dB (81.25%) (5.2 GHz, 3.8-9 GHz) and a 3 dB axial ratio (AR) bandwidth (30.7%) (1.63 GHz, 4.48-6.11 GHz). The antenna's different parameters are discussed, which recommend the suggested antenna to be used in UWB, sub 6 GHz, and WLAN wireless applications.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14071308