CAVITY-BACKED ANTENNAS WITH DIELECTRIC AND AIR CAVITIES, AND REFLECT-ARRAY ANTENNA AND MILLIMETER-WAVE TRANSMISSION SYSTEM INCORPORATING THE SAME

摘要

A cavity backed millimeter-wave antenna comprises a dielectric cavity (102) within a semiconductor substrate (110) having walls defined by a plurality of vias (104) through the substrate, and a gas cavity (108) external to the substrate (110) aligned with the dielectric cavity (102). A ground plane side (116) of the substrate may be devoid of ground plane conductive material (122) substantially between the walls of the dielectric cavity (104). In a slot-antenna embodiment, a microstrip feed line (114) may be disposed on the substrate across a slot (102) over the cavities. The slot may be a rectangular region without conductive material on a circuit side (118) of the substrate over the dielectric cavity (102). In a dipole embodiment, a first pole (202) comprising conductive material may be disposed on a ground plane side (116) of the substrate (110) over the cavities, and a second pole (203) comprising conductive material may be disposed on a circuit side (118) of the substrate (110) over the cavities.