A Design of Wideband Circularly Polarized Antenna With Stable Phase Center Over the Whole GNSS Bands

A Design of Wideband Circularly Polarized Antenna With Stable Phase Center Over the Whole GNSS Bands

In this letter, a simple crossed-dipole antenna with four parasitic plates is designed to realize a stable phase center. Owing to the high symmetry of crossed dipole, its phase center within a narrow solid region can remain stable. By adding parasitic plates rotationally on the reflector, beamwidth...

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Veröffentlicht in:IEEE antennas and wireless propagation letters 2019-12, Vol.18 (12), p.2746-2750
Hauptverfasser: Zhang, Hongliang, Guo, Yuanyue, Wang, Gang
Format: Artikel
Sprache:eng
Schlagworte:
Antenna measurements
Bandwidths
Broadband
Broadband antennas
Circular polarization
Circularly polarized (CP) antenna
Dipole antennas
Global navigation satellite system
Parasitic elements (antennas)
Plates
stable phase center
Wideband
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Beschreibung
Zusammenfassung:In this letter, a simple crossed-dipole antenna with four parasitic plates is designed to realize a stable phase center. Owing to the high symmetry of crossed dipole, its phase center within a narrow solid region can remain stable. By adding parasitic plates rotationally on the reflector, beamwidth of stable phase center is widened. Both simulation and measurement of the designed antenna yield a -10 dB impedance bandwidth of 63.2% and a 3 dB axial-ratio bandwidth of 52.4%, covering all the global navigation satellite system (GNSS) bands. For each GNSS band, a phase center variation is retained below 3° above the 10° elevation. Over the whole GNSS bands, phase center deviation with frequency is retained below 1.1 mm.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2019.2951006