A novel wide-band circularly polarized patch antenna based on L-probe and aperture-coupling techniques

A novel wide-band circularly polarized patch antenna based on L-probe and aperture-coupling techniques

The design and measurements of a wide-band patch antenna with circular polarization are presented. For the proposed antenna, an L-probe and an aperture are utilized to feed the patch orthogonally. The distance between the patch and the ground plane is 0.1 free-space wavelength at 1.8 GHz. Air is use...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2005-01, Vol.53 (1), p.577-582
Hauptverfasser: Lau, K.L., Luk, K.M.
Format: Artikel
Sprache:eng
Schlagworte:
Antenna feeds
Antenna measurements
Aperture antennas
Bandwidth
Broadband antennas
Dielectric measurements
Dielectric substrates
Patch antennas
Polarization
Wavelength measurement
Wide-band circularly polarized patch antenna
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Beschreibung
Zusammenfassung:The design and measurements of a wide-band patch antenna with circular polarization are presented. For the proposed antenna, an L-probe and an aperture are utilized to feed the patch orthogonally. The distance between the patch and the ground plane is 0.1 free-space wavelength at 1.8 GHz. Air is used as the dielectric substrate. A Wilkinson power combiner is connected to the feeds to generate circular polarization. The antenna possessed a 14-dB return loss bandwidth of 35% (from 1.49 to 2.12 GHz), and has a 3-dB axial ratio bandwidth of 20.4% (from 1.67 to 2.05 GHz). The 3-dB axial ratio beamwidth and the boresight axial ratio are 84/spl deg/ and 1.94 dB at 1.8 GHz, respectively.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2004.838796