Title :
Small Circularly Polarized U-Slot Wideband Patch Antenna
Author :
Lam, Ka Yan ; Luk, Kwai-Man ; Lee, Kai Fong ; Wong, Hang ; Ng, Kung Bo
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China
fDate :
7/3/1905 12:00:00 AM
Abstract :
A single-feed circularly polarized (CP) patch antenna at L-band is designed and built using the recently developed U-slot loaded patch technique. With the presence of the U-slot, the antenna fabricated on a high-dielectric-constant (εr = 10.02) substrate achieves a reasonable axial-ratio bandwidth. At the operating frequency of 1.575 GHz, the size of the patch is 0.13λo × 0.13λo, while the ground size is 0.315λo × 0.315λo and the thickness of the substrate is 0.05λo. The measured gain is 4.5 dBi, and axial-ratio bandwidth is 3.2%.
Keywords :
UHF antennas; antenna feeds; electromagnetic wave polarisation; microstrip antennas; U-slot loaded patch technique; axial-ratio bandwidth; frequency 1.575 GHz; high-dielectric-constant substrate; single-feed circularly polarized patch antenna; small circularly polarized U-slot wideband patch antenna; Bandwidth; Frequency measurement; Gain; Impedance; Patch antennas; Substrates; Circularly polarized (CP); U-slot; patch antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2110631
