Summary
International Symposium on Antennas and Propagation
2008
Session Number:1C02
Session:
Number:1C02-3
Phase Shifters for Electrical Down Tilted WiMAX BTS Antenna
Dau-Chyrh Chang, Bing-Hao Zeng, Ji- Chyun Liu,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
The mechanical adjustable phase shifter is developed for electrical down titled WiMAX BTS (Base Transceiver System) antenna. The operation theory of phase change is obtained by the mutual coupling between parts of microstrip meander line and the dielectric substrate coupler. The operating frequency is from 2.3 to 2.7 GHz. The WiMAX BTS antenna array is composed of eight dipole antenna elements, eight phase shifters, and 1:8 power divider. In order to reduce the size, the 1:8 power divider, microstrip line, and phase shifters are integrated to compact RF assembly. By using the designed compact RF assembly, the maximum electrical down tilted beam scan angle for the WiMAX BTS antenna array is10.5? at 2.7 GHz