Title :
A branch-line coupler with two arbitrary operating frequencies using left-handed transmission lines
Author :
I-Hsiang Lin ; Caloz, C. ; Itoh, T.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A branch-line coupler (BLC) working at two arbitrary frequencies using left-handed (LH) transmission lines (TLs) is presented. The analysis of the structure is based on the even-odd mode analysis of the conventional BLC as well as a recently developed model for the LH-TL. We demonstrate that the two operating frequencies can be obtained by tuning the phase slope of the different line sections. A prototype is demonstrated by both simulation and measurement results. The operating frequencies of the two pass-bands are 920 MHz and 1740 MHz, respectively.
Keywords :
transmission line theory; waveguide couplers; 1740 MHz; 920 MHz; branch-line coupler; dual-frequency operation; even-odd mode analysis; left-handed transmission line; phase slope tuning; Communication standards; Couplings; Delay; Frequency; Modems; Transmission line theory; Transmission lines; Tuning; Virtual prototyping; Wireless communication;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210944
