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 d isposed within the perimeter of and on top of the lower dielectric puck. An upper low di electric 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 disp osed within the perimeter of and on top of the upper dielectric puck. Dielectric fill er material (26) having a dielectric constant that is lower than that of the lower dielectri c puck surrounds the dielectric pucks. A radome (18) is disposed on top of the parasiti c disc and the unit cell. Two orthogonal pairs of excitation probes (14) are coupled to the lower excitable disc. The polarization of the phased array antenna may be single linear polarization, dual linear polarization, or circular polarization depending on wh ether a single pair or two pairs of excitation probes are excited