Title :
The study of Butler matrix BFN for four beams antenna system
Author :
Dau-Chyrh Chang ; Shin-Huei Jou
Author_Institution :
Da-Yeh Univ., Changhua, Taiwan
Abstract :
In this paper, four beam patterns with frequency range from 1.7 GHz/spl sim/2.2 GHz is generated by a 4/spl times/2 antenna array. The directions of these beam patterns are /spl plusmn/12/spl deg/ /spl plusmn/40/spl deg/. The antenna directivity changes from 18 dBi to 18.7 dBi for these beam patterns. And the antenna gain changes from 10 dBi to 12.3 dBi. The H-plane 3 dB beamwidth changes from 21 degrees to 24.4 degrees. The test results are quite in agreement with that of simulation.
Keywords :
UHF antennas; antenna arrays; antenna radiation patterns; beam steering; broadband antennas; multibeam antennas; 1.7 to 2.2 GHz; Butler matrix BFN; antenna array; antenna directivity; beam forming network; beam patterns; beamwidth; four beams antenna system; multiple beam antenna; wideband MBA; Antenna arrays; Base stations; Butler matrix; Delay lines; Directional antennas; Electromagnetic interference; Phase shifters; Radio frequency; Testing; Wideband;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220149
