Title :
Broadband butler matrix with flat coupling
Author :
Zheng, S. ; Chan, W.S. ; Leung, S.H. ; Xue, Q.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong
Abstract :
Conventional Butler matrices composed of hybrids, crossovers and phase shifters, are narrowband structures. Presented is a constant coupling and phase shift broadband Butler matrix with a simple structure using novel disk hybrids and improved phase shifters
Keywords :
antenna arrays; phase shifters; waveguide couplers; broadband Butler matrix; disk hybrids; narrowband structures; phase shifters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20070274
