Title :
A novel design of high directivity CPW directional coupler design by using DGS
Author :
Kim, Dong-Joo ; Jeong, Yongwoo ; Kang, Jung-Hoon ; Kim, Jong-Hwa ; Kim, Chul-Soo ; Lim, Jong-Sik ; Ahn, Dal
Abstract :
A GBSC CPW (general broadside coupled coplanar waveguide) directional coupler with DGS (defected ground structure) is presented, which has an excellent directivity. An even-odd analysis is performed for the GBSC CPW directional coupler with DGS. Using the analysis method, a high directivity directional coupler, which has an arbitrary coupling coefficient is designed. As an example, a 3dB coupler is fabricated and measured at 2GHz. The measured directivity of the directional coupler is higher than 44dB.
Keywords :
coplanar waveguide components; coupled transmission lines; directional couplers; 2 GHz; GBSC CPW directional coupler; arbitrary coupling coefficient; defected ground structure; even-odd analysis; general broadside coupled coplanar waveguide directional coupler; high directivity directional coupler; Bandwidth; Circuits and systems; Coplanar waveguides; Coupling circuits; Design engineering; Directional couplers; Impedance; Information technology; Performance analysis; Wireless communication;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516901
