Multi-frequency band phased array antenna using coplanar dipole array with multiple feed ports

摘要: In a printed circuit embodiment, dielectric boards in multilayer arrangement have their ends protruding from ground plane. Sets of dipole elements are disposed along the edge each board. Each set has three feed ports. Bandpass filters provided for port. Phase shifters coupled to ports through its respective bandpass filter. At low band, outer shorted by so that two sections left center port form one lone band arm, and right other arm. The is driven at high becomes an open thereof dipole, second dipole. drive array band. MMIC stubs bridged across length stub wavelength frequency one-and-one-half wavelengths frequency, appear be short-circuited. terminals provide 180 degree phase difference balun.