Title :
Design of a broad-band novel Butler matrix
Author :
Nguyen, Huy Thong ; Ang, Kian Sen ; Ng, Geok Ing
Author_Institution :
NOVITAS - Nanoelectron. Centre of Excellence, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A novel broad-band Butler matrix, incorporating 180° hybrids instead of 90° couplers, is designed. Impedance-transforming 180° hybrids and Schiffman´s phase shifters are employed in the circuit. The Butler matrix has been rearranged to eliminate the crossovers, achieving an excellent amplitude performance, and flat phase responses over the frequency range of 1.6-2.4 GHz.
Keywords :
UHF phase shifters; network synthesis; Schiffman phase shifter; broadband Butler matrix design; coupler design; crossover elimination; flat phase response; frequency 1.6 GHz to 2.4 GHz; impedance-transforming hybrid; Bandwidth; Broadband antennas; Broadband communication; Butler matrix; Couplers; Microwave communication; Phase shifters; 180° hybrids; Butler matrix; phased arrays;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
