Advanced Annular Beam Antenna Design and Analysis

• Main Authors: Hung, Ming-I, 洪明誼
• Other Authors: Hwang, Kao-Shing; Chang, Feng-Chen
• Format: Others
• Language: en_US
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/94701796990905909799

碩士 === 國立中正大學 === 電機工程研究所 === 83 === This resarch is to develop an annular beam antenna for the satellite communication and remote-sensing systems used. The far-field pattern of the annular beam antenna has the advantages of uniform earth coverage and better characteristics than conventional beam pattern. There are two types of annular beam antennas investigated in the thesis, it treated as a planar phase array antenna and the regular shaped parabolic reflector antenna. The far-field solutions from aperture distribution are derived from Maxwell's equation, then applied it to analyze the planar phase array antenna. The cylindrical annular beam and spherical annular beam are two types of planar phase array antenna which meet the different shape of annular beams. On the other hand, the regular shaped reflector antenna was submitted for its simple symmetrical configure and using single feed source. The same results were derived from two points of view, they are the circular cone surface aperture distribution and the circular plane surface aperture distribution. At last, the far-field patterns of contour plots and E-plane cuts are simulated by the use of the developed computer programs for various design parameters. It can achieve various shapes of annular beam patterns by modified the parameters.