Title :
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.
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;
Conference_Titel :
Communications Systems, 2004. ICCS 2004. The Ninth International Conference on
Conference_Location :
Singapore, China
Print_ISBN :
0-7803-8549-7
DOI :
10.1109/ICCS.2004.1359446
