A wideband circularly polarized conical-beam patch antenna

Author

Lau, K.L. ; Luk, K.M.

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong

Volume

54

Issue

5

fYear

2006

fDate

5/1/2006 12:00:00 AM

Firstpage

1591

Lastpage

1594

Abstract

A circularly polarized conical-beam patch antenna that employs a hybrid feeding mechanism for wideband operation is presented in this paper. It is implemented through using a pair of L-probes and apertures, which are connected by the feeding network, to excite the circular patch in orthogonal directions. The patch is supported by two plastic posts of 0.084 lambda₀ height in the air, where lambda₀ is the free-space wavelength at 2.53 GHz. This antenna possesses an impedance bandwidth of 28.2% (SWR<1.5) and an axial ratio bandwidth (AR<3 dB) of 28.3%. Also, it has left-hand circularly polarized conical patterns with the peaks located at around thetas=plusmn33deg over these bandwidths. Moreover, its 3-dB gain bandwidth and peak gain are 32.4% and 5.5 dBic, respectively

Keywords

antenna feeds; antenna radiation patterns; aperture antennas; broadband antennas; conical antennas; electromagnetic wave polarisation; microstrip antennas; L-probe feeding mechanism; antenna aperture; conical-beam patch antenna; impedance bandwidth; wideband circular polarization; Antenna radiation patterns; Antennas and propagation; Bandwidth; Broadband antennas; Helical antennas; Patch antennas; Polarization; Satellite antennas; Spirals; Surface impedance; Circular polarization; conical-beam; patch antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2006.874361

Filename

1629290