Patent ID: 6339404
Filing Date: 2002-01-15
Classification: H01Q

Abstract:
A diversity antenna structure for a wireless communication device for receiving and transmitting communication signals, said wireless communication device providing a pair of coax feedlines, each feedline having a center conductor and a shield conductor, said antenna structure comprising:a dielectric substrate defining a pair of major surfaces; a conductive reflector element disposed upon one of the major surfaces of the dielectric substrate, said reflector element being operatively coupled to the pair of shield conductors of the coax feedlines; a plurality of serpentine radiator elements disposed upon said one of the major surfaces of the dielectric substrate, each of the plurality of radiator elements having a first and second end, and each of the plurality of radiator elements conductively coupled at a first end to the reflector element; a pair of transmission lines disposed upon the other major surface of the dielectric substrate substantially opposite the reflector element, each of the pair of transmission lines coupled to one of the center conductors of the coax feedlines; and a pair of conductive balun structures disposed upon the dielectric substrate and coupled to the pair of transmission lines, said pair of conductive balun structures being disposed substantially opposite the plurality of serpentine radiator elements.