Title :
A Compact Forward Coupler Using Coupled Composite Right/Left-Handed Transmission Lines
Author :
Hirota, Akimichi ; Tahara, Yukihiro ; Yoneda, Naofumi
Author_Institution :
Mitsubishi Electr. Corp., Kamakura, Japan
Abstract :
A novel forward coupler using coupled composite right/left-handed (CRLH) transmission lines (TLs) is presented. Forward coupling is enhanced by the CRLH TLs, which have a considerable difference between the effective phase constants in the even and odd modes. A 10-dB forward coupler using the coupled CRLH TLs is simulated and experimentally demonstrated in the S-band. Its coupled-line length is reduced to half that of the conventional right-handed forward coupler with the same coupling.
Keywords :
UHF couplers; transmission lines; compact forward coupler; coupled CRLH TL; coupled composite left-handed transmission lines; coupled composite right-handed transmission lines; coupled-line length; gain 10 dB; Composite right/left-handed (CRLH) transmission lines (TLs); forward couplers; multilayers;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2009.2034304
