Patent ID: 6903541

Claim:
A multilayer microwave or mm-wave circuit comprising: a first metallization layer, at least a portion of said first metallization layer adapted for operation at a frequency ranging from 20 GHz to 100 GHz; circuit components disposed on said first metallization layer, said circuit components selected from discrete semiconductor components and integrated circuit chips; a second metallization layer, at least a portion of said second metallization layer adapted for operation as a ground plane; a dielectric substrate layer, said dielectric substrate layer disposed between said first and second metallization layers; and a plurality of conductive vias extending through said dielectric substrate layer and through said first and second metallization layers and electrically connecting portions of said first and second metallization layers, wherein an interior surface of said conductive vias is plated with an electrically conductive material and a central portion of said conductive vias is substantially free of electrically conductive material, said multilayer microwave or mm-wave circuit being a flexible circuit.