QUASI-PLANAR CIRCUITS WITH AIR CAVITIES

摘要

A quasi-planar circuit comprising a plurality of boards, each of the plurality of boards comprising a substrate; at least one of the plurality of boards having at least one air cavity formed in the substrate; at least one of the plurality of boards having at least one metal layer including at least one patterned metal portion, the at least one patterned metal portion being over the at least one air cavity; wherein the at least one patterned metal portion and the at least one air cavity are for controlling at least a part of an electromagentic field distribution in the region of the at least one patterned metal portion and the air cavity.