MONOLITHIC MICROWAVE INTEGRATED CIRCUITS (MMICS) HAVING CONDUCTOR-BACKED COPLANAR WAVEGUIDES AND METHOD OF DESIGNING SUCH MMICS

摘要

A MMIC (10) having: a substrate (18); a plurality of active and passive electrical elements (FET1, C1-C4, L1-L3,TEE) disposed on a top surface of the substrate; a plurality of coplanar waveguide transmission line sections (20a-d) disposed on the top surface of the substrate for electrically interconnecting the active and passive electrical elements; an electrical conductor (21) disposed on a bottom surface of the substrate under the coplanar waveguide section. Edges of ground plane conductors of the coplanar waveguide (CPW) sections have slots (30) therein in regions thereof connected to the active and passive devices. The design of such circuit includes mathematical models of the CPW with the pair of local ground planes and the strip conductor thereof have relatively narrow connectable ports.