Title :
Analysis of rotationally symmetrical antenna with wider beamwidth
Author :
Yagyu, D. ; Tanaka, K. ; Fujimoto, T. ; Taguchi, M.
Author_Institution :
Fac. of Eng., Nagasaki Univ., Japan
Abstract :
The authors propose an oblate spheroidal antenna (OSA) in order to widen its beamwidth. This antenna is numerically and experimentally analysed. The OSA consists of of a linearly polarised circular patch microstrip antenna (MSA) and upper and lower oblate spheroidal conductors. The substrate of the MSA is truncated at the edge of the patch. In the numerical analysis, the electromagnetic fields within the antenna cavity are expanded by the modal functions and their unknown expansion coefficients are determined by the electric and magnetic field integral equations.
Keywords :
antenna radiation patterns; electric field integral equations; electromagnetic fields; electromagnetic wave polarisation; magnetic field integral equations; microstrip antennas; modal analysis; antenna cavity; beamwidth; electric field integral equation; electromagnetic fields; expansion coefficients; linearly polarised circular patch microstrip antenna; magnetic field integral equation; modal functions; numerical analysis; oblate spheroidal antenna; oblate spheroidal conductors; rotationally symmetrical antenna; substrate; Dielectric substrates; Feeds; Polarization; Voltage; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1998. IEEE
Print_ISBN :
0-7803-4478-2
DOI :
10.1109/APS.1998.699145
