A Wideband Circularly Polarized Crossed-Slot Antenna With Stable Phase Center

A wideband circularly polarized crossed-slot antenna with a stable phase center is investigated in this letter. The proposed antenna consists of a crossed-slot radiator and a Γ-shaped feeding structure. Orthogonal modes can be excited by perturbing the crossed slot to realize circular polarization....

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Veröffentlicht in:	IEEE antennas and wireless propagation letters 2019-05, Vol.18 (5), p.941-945
Hauptverfasser:	Zhang, Hongliang, Guo, Yuanyue, Wang, Gang
Format:	Artikel
Sprache:	eng
Schlagworte:	Antenna measurements Antennas Bandwidths Broadband Circular polarization Circularly polarized (CP) antenna Global navigation satellite system Global Positioning System Navigation satellites Radiators Slot antennas Stability analysis stable phase center Wideband
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Beschreibung
Zusammenfassung:	A wideband circularly polarized crossed-slot antenna with a stable phase center is investigated in this letter. The proposed antenna consists of a crossed-slot radiator and a Γ-shaped feeding structure. Orthogonal modes can be excited by perturbing the crossed slot to realize circular polarization. Both simulation and measurement of the designed antenna demonstrate a -10 dB impedance bandwidth of 43.8% and a 3 dB axial-ratio bandwidth of 42.6%, covering all the global navigation satellite system (GNSS) bands. Due to the overall symmetry of the radiation crossed slot, a phase center of the proposed antenna remains stable within a wide beam of 100° covering the whole GNSS bands, with phase center variation retained below 5°.
ISSN:	1536-1225 1548-5757
DOI:	10.1109/LAWP.2019.2906363