Title :
Coupling and Impedance Between Line and Ground Electrodes on GaAs ; Implications for MMIC Design
Author :
Le Brun, Marina ; Jay, Paul R. ; Rumelhard, Christian
Author_Institution :
Laboratoire Circuits Integrés Hyperfréquences, LCR - THOMSON-CSF, Domaine de Corbeville B.P. 10, ORSAY 91401 (France)
Abstract :
Addressing the need for quantitative design rules in C.A.D. of microwave GaAs i.c.s, we describe the evaluation of microwave coupling and impedance for various systems of conductors on GaAs substrates. In particular, the coupling between two parallel microstrip lines has been calculated as a function of the presence of an intermediate screening electrode. Measurements. of the effect support the calculated data, and confirm a substantially reduced coupling across the electrode when grounded. The impedance of a line on a back-metallised substrate, with a parallel coplanar ground electrode has also been determined for a range of line geometries.
Keywords :
Conductors; Coupling circuits; Electrodes; Gallium arsenide; Geometry; Impedance; Integrated circuit measurements; MMICs; Microstrip components; Strips;
Conference_Titel :
Microwave Conference, 1981. 11th European
Conference_Location :
Amsterdam, Netherlands
DOI :
10.1109/EUMA.1981.332931