The Study of RF BFN for Multiple Beams Antenna System

• Main Authors: Chen Kuo-Chang, 陳國章
• Other Authors: Chang Dau-Chyrh
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/43532597445810081196

碩士 === 大葉大學 === 電機工程研究所 === 90 === In this thesis, we have designed multiple beams antenna system by two beam-forming network. They can improve the multi-path effect in communication system. The two kind of beam-forming network that are：（1）Beam-forming network by 64 coaxial cable delay lines and 16 power dividers, and connect the antenna array that have eight coaxial collinear antennas locate above large ground plane to form one multiple beams antenna. The total eight beamwidth are changing form 10 degrees to 15 degrees for different beam scan angles, and the horizontal azimuth can scan 70 degrees.（2）Beam-forming network by Rotman Lens, and connect the same antenna array to form one multiple beams antenna. The total eight beamwidth are changing form 15 degrees to 20 degrees for different beam scan angles, and the horizontal azimuth can scan 100 degrees.