Title :
A novel rat race coupler design for dual-band applications
Author :
Cheng, Kwok-Keung M. ; Wong, Fai-Leung
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, China
Abstract :
This letter presents a novel and compact rat-race coupler design that can operate at two widely separated frequency bands. It is accomplished by modifying the length and impedance of the branch lines in the conventional structure, and the insertion of two additional shunt stubs. The proposed circuit also features planar structure and low insertion loss. For verification, the measured performance of a microstrip coupler operating at 900/2000MHz are shown.
Keywords :
integrated circuit design; microstrip couplers; microwave integrated circuits; passive networks; branch lines; dual-band application; insertion loss; microstrip coupler; microwave circuits; planar structure; rat race coupler design; shunt stubs; Coupling circuits; Dielectric loss measurement; Dielectric measurements; Dual band; Frequency; Impedance; Insertion loss; Loss measurement; Microstrip; Microwave devices; Couplers; dual band; microwave circuits;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.852792
