A rectangular-cavity-backed cloverleaf slot antenna for circular polarization

Author

Watanabe, Takahiro ; Hirasawa, Kazuhiro ; Nemoto, Shojiro

Author_Institution

Graduate Sch. of Syst. & Inf. Eng., Tsukuba Univ.

fYear

2004

fDate

7-7 Sept. 2004

Firstpage

595

Lastpage

597

Abstract

Characteristics of a rectangular-cavity-backed cloverleaf slot antenna are investigated numerically and experimentally. The method of moments is used to calculate the antenna characteristics where the effects of the cavity are taken into account. The minimum axial ratio of 1.11 dB and the maximum gain of 10.6 dBi are obtained at 2.19 GHz. The frequency bandwidth for the axial ratio (AR) (< 3 dB) and VSWR (< 2) is 2.7%. The symmetrical radiation pattern is obtained with respect to the vertical. The calculated results on AR, VSWR, and radiation patterns are agree well with measured data

Keywords

UHF antennas; antenna radiation patterns; electromagnetic wave polarisation; method of moments; slot antennas; 2.19 GHz; circular polarization; rectangular-cavity-backed cloverleaf slot antenna; symmetrical radiation pattern; Antenna measurements; Antenna radiation patterns; Bandwidth; Frequency measurement; Magnetic separation; Moment methods; Polarization; Slot antennas; Systems engineering and theory; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications Systems, 2004. ICCS 2004. The Ninth International Conference on

Conference_Location

Singapore, China

Print_ISBN

0-7803-8549-7

Type

conf

DOI

10.1109/ICCS.2004.1359446

Filename

1359446