PLANAR LOW PROFILE, WIDEBAND, WIDE-SCAN PHASED ARRAY ANTENNA USING A STACKED-DISC RADIATOR

摘要

A phased array antenna (10) having stacked-disc radiators embedded in dielectric media. The phased array antenna has a rectangular arrangement of unit cells (19) that are disposed on a ground plane (11). A lower dielectric puck (12) with a high dielectric constant is disposed on the ground plane. An excitable disc (13) is disposed within the perimeter of and on top of the lower dielectric puck. An upper lo w dielectric constant dielectric puck (16) that has a dielectric constant lower than that of the lower dielectric puck is disposed on the excitable disc. A parasitic disc (17) is disposed within the perimeter of and on top of the upper dielectric puck. Dielectric filler material (26) having a dielectric constant that is lower than that of the lower diele ctric puck surrounds the dielectric pucks. A radome (18) is disposed on top of the para sitic disc and the unit cell. Two orthogonal pairs of excitation probes (14) are couple d to the lower excitable disc. The polarization of the phased array antenna may be si ngle linear polarization, dual linear polarization, or circular polarization depending o n whether a single pair or two pairs of excitation probes are excited