Title :
Mechanical adjustable phase shifters for WiMAX BTS antenna
Author :
Chang, Dau-Chyrh ; Zeng, Bing-Hao ; Liu, Ji-Chyun
Author_Institution :
Yuan Ze Univ., Chungli
Abstract :
The compact RF assembly with continuous adjustable phase shifter is designed and fabricated for WiMAX BTS antenna. The phase change is obtained by adjusting the length of microstrip delay line and the coupling substrate material. The maximum phase changes 288deg, 363deg, and 454deg between port 1 and port 8 are obtained at frequencies 2.3 GHz, 2.5 GHz, and 2.7 GHz respectively. If the BTS antenna, eight antenna elements with element spacing 11 cm, are connected with this compact RF assembly, then the maximum beam scan angles are 7.8, 9 and, 10.5 degree at 2.3 GHz, 2.5 GHz, and 2.7 GHz.
Keywords :
WiMax; antennas; phase shifters; RF assembly; WiMAX BTS antenna; coupling substrate material; distance 11 cm; eight antenna elements; element spacing; frequency 2.3 GHz; frequency 2.5 GHz; frequency 2.7 GHz; microstrip delay line; phase change; phase shifters; Assembly; Dielectric materials; Dielectric substrates; Microstrip; Permittivity; Phase shifters; Phased arrays; Radio frequency; Switches; WiMAX;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958099
