Patent ID: 6917262

Claim:
Integrated microwave module comprising a conductive around plane, a non-conductive substrate on said around plane, at least two microwave circuits mounted on said substrate, a transmission line mounted on said substrate between said microwave circuits, and a conductive cover closing said integrated microwave module, wherein: said substrate comprises lines of metallized holes along said transmission line on both sides of said transmission line; and respective strips of conductive paste are disposed between said lines of metallized holes and said conductive cover, wherein said lines of metallized holes are parallel to each other and separated by a length spacing, said conductive ground plane and a surface of said conductive cover being parallel to each other and separated by a width spacing, wherein said width and length represent the dimensions of a cross section of a virtual rectangular waveguide which encloses said transmission line, and which is limited by said conductive ground plane, said lines of metallized holes, said strips of conductive paste and said conductive cover, said width and length being such that said virtual rectangular waveguide presents a cutoff frequency at a predefined frequency value, and wherein said transmission line prevents propagation, in said substrate, of unwanted frequencies above said cutoff frequency.