Title :
A novel wideband circularly polarized patch antenna based on L-probe and slot-coupling techniques
Author :
Lau, K.L. ; Luk, K.M.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The design and measurements of a wideband patch antenna with circular polarization are presented. For the proposed antenna, an L-probe and a coupling aperture are utilized to feed the patch orthogonally. The distance between the patch and the ground plane is 0.1 free space wavelength at 18 GHz. The patch is supported by plastic posts in the air. A Wilkinson power combiner is connected to the feeds to generate circular polarization. The antenna possesses a 14 dB return loss bandwidth of 35% (from 1.49-2.12 GHz), and it has a 3 dB axial ratio bandwidth of 20.4% (from 1.67-2.05 GHz) The 3 dB axial ratio beamwidth and the bore sight axial ratio are 840 and 1.94 dB at 1.8 GHz, respectively.
Keywords :
UHF antennas; antenna feeds; broadband antennas; electromagnetic wave polarisation; microstrip antennas; power combiners; slot antennas; 1.49 to 2.12 GHz; 1.67 to 2.05 GHz; 1.8 GHz; 18 GHz; L-probe feed; Wilkinson power combiner; circular polarization; patch antenna; plastic post supported patch; slot-coupling; wideband circularly polarized antenna; Antenna feeds; Antenna measurements; Aperture antennas; Aperture coupled antennas; Bandwidth; Broadband antennas; Patch antennas; Plastics; Polarization; Wavelength measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220050
