Title :
Enhanced forward coupling phenomena between microstrip lines on periodically patterned ground plane
Author :
Chin-Chang Chang ; Yongxi Qian ; Tatsuo Itoh
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
Strong forward coupling and slow-wave effects have been observed between two parallel microstrip lines on a periodically patterned ground plane, even though the two lines are separated with very large gap spacing. The even- and odd-mode effective dielectric constants have been calculated using the FDTD method to investigate this phenomenon. The slow-wave effects and enhanced coupling will help in the design of forward-wave directional couplers with reduced line lengths and relaxed gap spacing requirements.
Keywords :
microstrip directional couplers; periodic structures; slow wave structures; effective dielectric constants; enhanced forward coupling phenomena; forward-wave directional couplers; gap spacing requirements; line lengths; parallel microstrip lines; periodically patterned ground plane; slow-wave effects; Couplings; Dielectric constant; Dielectric measurements; Dielectric substrates; Directional couplers; Finite difference methods; Frequency; Microstrip; Optical attenuators; Periodic structures;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967312
