Abstract: The radio antenna arrangement for establishing a radio link with terrestrial radio stations includes a group of antennas (10) mounted on an inclined window pane (1) of a particular electrically conductive motor vehicle body, each of the antennas (10) including an antenna element (3) mounted outside of an interior of the vehicle body (8) and on the window pane perpendicular to it; an antenna counterweight (4) mounted on the inclined window pane, the antennas (10) together forming a group antenna with a group antenna connection point (6); and a network (7) containing the group antenna connection point (6), the antennas being radiatively coupled to each other by high-frequency radiation and at least one antenna (10) having an antenna element connection point (2) connecting it with the network (7).

Abstract: Antenna diversity receiving system for mobile reception of television signals having N antenna inputs, one diversity processor with as many inputs, and connected downstream in the system to a television receiver, the video signal of the television receiver and the line and picture synchronizing signals being applied to the diversity processor. The diversity processor comprises a time gate circuit which is opened by the line synchronizing pulses during the line blanking interval and switches the video signal through to the signal quality evaluation circuit. At that location an output signal having the signal quality of the video signal is produced which is applied to the control circuit. In the case of an imminent picture disturbance the control circuit produces an address signal so that very rapidly a new antenna signal or a linear combination derived from the antenna signals is applied to the television receiver by means of the antenna combiner.

Abstract: The antenna diversity system for mobile reception of VHF and UHF waves has a plurality of antennae; an antenna distributor connected to each of the antennae to receive antenna signals from the antennae and having a plurality of inputs and sets of outputs; a plurality of antenna switches, each of the antenna switches being connected to one of the sets of outputs of the antenna distributor; a plurality of tuners, each of the tuners connected to one of the antenna switches and producing one of an intermediate-frequency signal and demodulated signal; a plurality of diversity processors, each of the diversity processors being connected to a tuner to receive an intermediate-frequency or demodulated signal therefrom and also to the antenna switch of the tuner connected thereto via a control line and being structured to carry out a signal evaluation of the signal received in the diversity processor to control the antenna switch to switch through a more favorable input signal to the tuner connected to it.

Abstract: An active reception antenna arranged on a non-conductive flat supporting piece (1, 2) set in a conductive body (2) of a motor vehicle, has an active four terminal network (5) having two input terminals (6a, 6b) and two output terminals (7a, 7b), an elongated antenna conductor (3a) secured on the supporting piece, an output transmission line (8) having a first section (14) of well defined layout which is connected to the output terminals (7a, 7b) and forms another antenna conductor (14) with a length (20) introducing a non-negligible however defined impedance for high frequencies between one of the output terminals (7b) and a ground contact (10), the input terminals (6a, 6b) being connected to the first mentioned elongated antenna conductor (3a) and to the other antenna conductor (14), providing an appropriate source impedance at the input of the active four terminal network, the output transmission line (8) having a second section (15) which is connected to the ground contact (10) and also to an inner connect

Abstract: Disclosed is a pane antenna installed in a heated window pane of a motor vehicle to receive frequencies above the high frequency range. The antenna includes at least one wire-shaped first antenna conductor extending across parallel heating conductors of a heating field. The crossing points of the first antenna conductor with heating conductors are preferably in galvanic contact to create a capacitive antenna region along the first antenna conductor. The capacitive antenna region is coupled via a second antenna conductor extending also perpendicularly to the heating conductors, to an antenna terminal arranged on the window pane in proximity to a rim. The window pane is surrounded by a conductive frame and a grounding point is created on the frame opposite the antenna terminal.

Abstract: An active window pane antenna for use in motor vehicles includes an antenna conductor arranged on the window pane and being connected via a conductor of negligible length to an input terminal of an active four terminal network also arranged on the pane. The output terminals of the network are connected via a first section of a transmission line to an antenna connector whose ground contact is connected for high frequencies to a ground point on the body of the motor vehicle. The impedance of the first section of the transmission line is not negligible for the received frequency bands and the input impedance of the four terminal network is balanced with respect to the first section. A second section of the transmission line extends from the antenna connector to a receiver.

Abstract: Disclosed is a pane antenna installed in a heated window pane of a motor vehicle to receive frequencies above the high frequency range. The antenna includes at least one wire-shaped first antenna conductor extending across parallel heating conductors of a heating field. The crossing points of the first antenna conductor with heating conductors are preferably in galvanic contact to create a capacitive antenna region along the first antenna conductor. The capacitive antenna region is coupled via a second antenna conductor extending also perpendicularly to the heating conductors, to an antenna terminal arranged on the window pane in proximity to a rim. The window pane is surrounded by a conductive frame and a grounding point is created on the frame opposite the antenna terminal.

Abstract: A unipole antenna arrangement for window pane of a motor vehicle mounted in a metal frame and including a heating field assembled of a plurality of substantially horizontally directed heating conductors, is composed of two superposed sets of substantially vertically directed antenna conductors. One of the sets extends in a first region in the heating field and the corresponding antenna conductors cross at least two horizontally directed heating wires. The antenna conductors in the other set extend in a region which adjoins the marginal heating conductor and terminates by common connection conductor leading to a connection point. The crossing points of the heating conductors and the antenna conductors are interconnected by a galvanic or a capacitive coupling. The connection point of the ends of the antenna conductors in the second set is connected by connection conductor with an antenna coupling point which is located near to the metal frame of the window pane.

Abstract: This invention refers to a diversity antenna system for use in a motor vehicle with at least two diversity antennas as well as a window-mounted heater structure consisting of lateral conductors (bus bars) supplying the heater current and heater sections in between. The configuration is such that each diversity antenna has lateral bus bars (4a, 4d; 4b, 4c) and heater sections (2a, 2b) between them as well as a pair of terminals connected to a feeder network (8a, 8b) of the diversity antenna. Each pair of terminals has a ground connection point (14a, 14b) and a tap point on a bus bar (5a, 5b). The tap points on the bus bars (5a, 5b) of the diversity antennas are located such that they are essentially isolated from each other with respect to radio frequencies. The power leads to the bus bars are provided with RF traps (6a through 6d). This serves to optimize the mean signal quality yielded by each individual antenna and to minimize the coincidence of interference in the signals coming from the antennas.