Hamza Nachouane, Abdellah Najid, Abdelwahed Tribak, Fatima Riouch. Broadband 4×4 Butler matrix using wideband 90° hybrid couplers and crossovers for beamforming networks. In 4th International Conference on Multimedia Computing and Systems, ICMCS 2014, Marrakech, Morocco, April 14-16, 2014. pages 1444-1448, IEEE, 2014. [doi]
Abstract is missing.