Title :
Vestigial dual-band quadrature branch line coupler with aligned phase and improved bandwidth response
Author :
Zheng, Shao Yong ; Chan, Wing Shing ; Tang, K.S. ; Man, K.F.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong
Abstract :
Previous dual-band quadrature branch line couplers were either narrow band or had phases in the two bands that are not aligned. A vestigial dual-band quadrature branch line coupler is presented that is phase aligned and with one band that is broad, making it ideal for WLAN and other dual-band applications.
Keywords :
transmission lines; wireless LAN; WLAN; dual-band quadrature branch line coupler; narrow band phases;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20081906
