Abstract: A glass antenna assembly for receiving and transmitting cellular telephone signals includes a two pair of dipole antennas, each pair mounted on a vehicle window. Space diversity is achieved by placing the vehicle windows with the antenna pair on opposite sides of the vehicle. This results in an improved omni-directional antenna pattern. Each dipole antenna is tunes, and employs at least three elements to broad band the dipole antenna. Coaxial feeders leading from the antenna assembly can be concealed under the roof lining for improved aesthetics.

Abstract: A high-frequency vehicle patch antenna such as for GPS or cellular communication systems is mounted close to the conductive roof panel on an interior surface of the vehicle windshield or backglass. Low impedance coupling to the roof panel is employed to alter the focus and gain characteristics of the antenna such that maximum antenna gain is more closely aligned to zenith, and gain improvements in the general direction over the roof panel and improved omni-directionality result.

Abstract: A noise attenuating antenna system for AM-FM recreational receivers having a single RF input for use on nonmetallic marine vessels or any other vehicle where electric noise presents a problem. The antenna system has at least a shielded loop antenna for receiving radio signals in the AM frequency band and a dipole antenna for receiving radio signals in the FM frequency band. An impedance matching and signal routing circuit passes the signals received by the shielded loop antenna and the dipole antenna to the recreational receiver. An amplifier, whose operation is controlled by a remotely located selection switch, passes the RF signals received by the loop antenna to the impedance matching and signal routing circuit and a signal attenuating circuit passes to ground the RF signals recevied by the dipole antenna when the selection switch is in an AM position.

Abstract: A broadband antenna for electromagnetic interference testing within a test chamber of limited dimensions includes a triangular array of tuned, quarter-wavelength monopole antenna elements with a common feed point in a plane parallel to elements defining a ground plane. The tuned elements transmit electromagnetic signals down to a low limiting resonant frequency determined by the longest element and further comprise, with the ground plane elements, a capacitor to transmit longer wavelength signals by a varying electric field between the triangular array and ground plane.