Summary
International Symposium on Antennas and Propagation
2015
Session Number:S3.1
Session:
Number:S3.1.1
Reduced Sidelobe Multibeam Antenna Array with Broadside Beam Fed by 4x8 Butler Matrix
Krzysztof Wincza, Artur Rydosz, Izabela Slomian, Slawomir Gruszczynski,
pp.-
Publication Date:2015/11/9
Online ISSN:2188-5079
Summary:
A concept of sidelobe level reduction in multibeam antennas fed by 4 x N Butler matrices has been extended on multibeam antennas with broadside beam. It has been shown that by adding in-phase power dividers at the output of a Butler matrix ensuring ±90°, 0° and 180° differential phases and by increasing the number of radiating elements a significant sidelobe reduction can be achieved, similarly as in case of known multibeam antennas fed by modified Butler matrices. The presented concept has been confirmed by measurements of a multibeam antenna array consisting of eight radiating elements fed by 4 x 8 modified Butler matrix in which the achieved sidelobe level is as low as -22 dB.