A Beamforming Circuit for Antenna Pattern Diversity in High- Speed Wireless Communications

• Main Authors: Luo, Jing-Jang, 駱景璋
• Other Authors: Shengfuh Chang
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/90115426537494523350

碩士 === 國立中正大學 === 電機工程學系 === 86 === The restriction on the current radio local areanetworks from getting higher rate is due to thereceived signal fading and arrival time delayspread. Such multipath effects can be reducedby antenna pattern diversity. this thesis is to design and implement at 5.2 GHz beamformer includes FET single-pole- double-throw switches, power splitters,and phase shifters, which are simulated with microwaveCAD tools for optmal performance. The measurement results show that the each output pairs has power imbalance within +/- 1.5dB and phase imbalance within +/- 2.5 degree.The isolated ports have at least 30 dB isolation andall ports has at least 9 dB return loss.