Title :
A novel wide-band circularly polarized patch antenna based on L-probe and aperture-coupling techniques
Author :
Lau, K.L. ; Luk, K.M.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
Abstract :
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° and 1.94 dB at 1.8 GHz, respectively.
Keywords :
antenna feeds; antenna radiation patterns; aperture-coupled antennas; broadband antennas; dielectric materials; electromagnetic coupling; electromagnetic wave polarisation; microstrip antennas; power combiners; 1.8 GHz; L-probe techniques; Wilkinson power combiner; aperture-coupling techniques; dielectric substrate; wideband circularly polarized patch antenna; Antenna feeds; Antenna measurements; Aperture antennas; Bandwidth; Broadband antennas; Dielectric measurements; Dielectric substrates; Patch antennas; Polarization; Wavelength measurement;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.838796
