Title :
On the design of Butler-like type matrices for low SLL multibeam antennas
Author :
Fakoukakis, Fanourios E. ; Kyriacou, George A. ; Sahalos, John N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Democritus Univ. of Thrace, Xanthi, Greece
Abstract :
A new type of beamformers, based on the widely known Butler Matrix, is presented. The new type retains the basic topology which is being modified to produce a tapered output amplitude distribution. The resulting pattern has a Side Lobe Level, (SLL), less than -20dB. The new design makes use of unequal Wilkinson power dividers. Further improvement can be achieved by appropriately shaping the antenna excitation amplitude distribution. This asks for increased power split ratios in the Wilkinson dividers, which causes higher power losses.
Keywords :
antennas; beam steering; matrix algebra; power dividers; Butler-like type matrix design; Wilkinson power divider; antenna excitation amplitude distribution; beamformer; power split ratio; side lobe level multibeam antenna; tapered output amplitude distribution; Antenna radiation patterns; Butler matrix; Linear matrix inequalities; Microstrip; Power dividers; Transmission line matrix methods; Butler Matrix; low SLL; multibeam antennas; tapered amplitude distribution;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6206139
