Title :
Finite difference quasi-TEM mode analysis of coupled coplanar lines used in (M)MIC directional couplers
Author :
Naghed, M. ; Hopf, B. ; Wolff, I.
Author_Institution :
IMST, Kamp-Lintfort, Germany
Abstract :
An accurate and efficient quasi-static finite difference field calculation is applied to multiple coupled coplanar lines. The characteristics of propagating quasi-TEM modes are derived from the charge and surface current distribution on conductors. Coplanar couplers of different center frequencies and coupling factors are designed and realized on ceramic and GaAs substrates. The scattering matrix of couplers is calculated utilizing the characteristics of quasi-TEM modes propagating along the coupled coplanar lines. Numerical results are compared with measurements showing good agreement.
Keywords :
MMIC; S-matrix theory; current distribution; directional couplers; electric charge; finite difference methods; microwave integrated circuits; GaAs; GaAs substrates; MIC directional couplers; MMIC directional couplers; center frequencies; ceramic substrates; charge distribution; coupled coplanar lines; coupling factors; finite difference field calculation; quasi-TEM mode analysis; scattering matrix; surface current distribution; Ceramics; Conductors; Coupled mode analysis; Couplers; Current distribution; Finite difference methods; Frequency; Gallium arsenide; Scattering; Transmission line matrix methods;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705134
