Title :
On the design of a butler matrix-based beamformer introducing low sidelobe level and enhanced beam-pointing accuracy
Author :
Fakoukakis, F.E. ; Kyriacou, G.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Democritus Univ. of Thrace, Xanthi, Greece
Abstract :
A novel Butler matrix-based beamformer nearly doubling the number of radiating beams with improved crossover and sidelobe level is presented. This new approach encompasses separate design ideas for sidelobe level improvement and beam-pointing accuracy enhancement, respectively. Explicitly, the number of available beams is almost doubled while the desired angular sector is scanned with radiated power variation of less than 1dB provided that a power control system is enabled.
Keywords :
antenna arrays; antenna feeds; array signal processing; matrix algebra; power control; Butler matrix-based beamformer design; beam radiation; beam-pointing accuracy enhancement; crossover level; low sidelobe level; power control system; radiated power variation; Accuracy; Arrays; Butler matrix; Microstrip; Phase shifters; Switches;
Conference_Titel :
Antennas and Propagation in Wireless Communications (APWC), 2011 IEEE-APS Topical Conference on
Conference_Location :
Torino
Print_ISBN :
978-1-4577-0046-0
DOI :
10.1109/APWC.2011.6046841
