Title :
A cavity-backed multifilar-curl antenna
Author :
Zalnud-Deen, S.H. ; Mahoud, K.R. ; Shaalan, A.A.M. ; Ibrahem, S.M.M.
Author_Institution :
Fac. of Electron. Eng., Menouftya Univ., Egypt
Abstract :
A multifilar-curl antenna is numerically analyzed in the presence of a flat circular reflector and a circular cavity. Wire grid method is used to simulate the conducting surfaces of the cavity. The current distribution along the antenna structure is determined by using the moment method. The radiation pattern, axial ratio, input impedance, VSWR, and the antenna gain of antenna backed by a circular reflector and a cavity are calculated using theoretically determined current distribution. The cavity enhances the antenna gain and improves the axial ratio in all planes.
Keywords :
antenna feeds; antenna radiation patterns; current distribution; dipole antennas; method of moments; mobile antennas; mobile satellite communication; transmitting antennas; VSWR; antenna gain; axial ratio; cavity-backed antenna; circular cavity; conducting surfaces; current distribution; feed points; flat circular reflector; free space; input impedance; mobile satellite communication; moment method; multifilar-curl antenna; orthogonal antennas; radiation pattern; wire grid method; Antenna radiation patterns; Antenna theory; Current distribution; Moment methods; Reflector antennas; Surface impedance; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1219305
