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

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

87

Lastpage

90

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 (ε_r = 10.02) substrate achieves a reasonable axial-ratio bandwidth. At the operating frequency of 1.575 GHz, the size of the patch is 0.13λ_o × 0.13λ_o, while the ground size is 0.315λ_o × 0.315λ_o and the thickness of the substrate is 0.05λ_o. 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;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2110631

Filename

5706334