Analysis and Design of Butler Beam-former for Smart-Antenna Mobile Communication
碩士 === 國立中正大學 === 電機工程研究所 === 92 === The switching-beam antenna Array belongs to 3G smart-antenna mobile communication. It switches a suitable beam to transmit and receive the desired signal while reduces the surrounding interferences to raise the ratio of signal to interference and noise...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2004
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/38663725757243865699 |
| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 92 === The switching-beam antenna Array belongs to 3G smart-antenna mobile communication. It switches a suitable beam to transmit and receive the desired signal while reduces the surrounding interferences to raise the ratio of signal to interference and noise. This work designs a compact high-performance four-beam Butler beam-former, which consists of proposed new multilayer spur-line couplers and Schiffman phase shifters. By comparing with the conventional Butler matrix, the proposed structure enhances 30 % bandwidth, and the circuit size is only 20 %.
|
|---|