Experimental study of a microstrip patch antenna with an L-shaped probe

Author

Mak, C.L. ; Luk, K.M. ; Lee, K.F. ; Chow, Y.L.

Author_Institution

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

Volume

48

Issue

5

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

777

Lastpage

783

Abstract

The L-shaped probe is shown to be an attractive feed for the thick microstrip antenna (thickness around 10% of the operating wavelength). A parametric study on the rectangular patch antenna is presented. It is found that the antenna attains 36% impedance bandwidth (SWR⩽2) as well as gain bandwidth and about 7-dBi average gain. A two-element array fed by L-probes is also proposed. Experiments show that the array design can substantially suppress the cross polarization of the proposed antenna. Both the antennas have stable radiation patterns across the passband. Moreover, the measured resonant frequencies of the proposed antenna agree well with an existing formula and the L-probe does not have much effect on the resonant frequency

Keywords

antenna feeds; antenna testing; electric impedance; electromagnetic wave polarisation; microstrip antenna arrays; resonance; L-shaped probe; SWR; antenna feed; array design; average gain; cross polarization suppression; experimental study; gain bandwidth; impedance bandwidth; measured resonant frequencies; microstrip patch antenna; parametric study; passband; rectangular patch antenna; resonant frequency; stable radiation patterns; two-element array; Antenna arrays; Antenna feeds; Bandwidth; Impedance; Microstrip antenna arrays; Microstrip antennas; Parametric study; Patch antennas; Probes; Resonant frequency;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.855497

Filename

855497