Abstract: The invention relates to a receiver system for vehicles having an antenna and a receiver with an interference signal receiving device. This interference receiving device comprises a coupling element with an input for taking up the pulse-like interference radiation emitted by the vehicle aggregates and which interference radiation emitted by the vehicle aggregates and which interfere with the reception, with an evaluation circuit for presenting the interference radiation. A controllable transmission element is disposed within the receiver between transmission elements. Controllable transmission element is controllable with respect to its transmission behavior for the purpose of signal sampling, which also receives output signals of evaluation circuit so that during the duration of the interference pulses, the interference pulses interfered with receive and sample usable signals.

Abstract: An antenna for a diversity antenna system in a vehicle for mounting within the zone of a window pane surrounded by the electrically conductive body of the vehicle, consisting of a rear window pane having a substantially rectangularly or trapezoidally shaped surface and electrically conductors applied to the surface. A conductive surface in terms of high frequency, and coherent with respect to its edge conductors (12) is formed within the rear window pane. The edge conductors (12) are insulated at high frequencies from the vehicle ground so that each edge conductor (12) of a side of the conductive surface (1) has a minimum length of about &lgr;/10. At least one zone of the edge conductors (12) is provided in the form of a low-resistance coupling conductor (12a) with a continuous minimum length of about &lgr;/10.

Abstract: The invention relates to an antenna on the window of a motor vehicle having a thin electrically conductive layer which is transparent for light, but reduces heat transmission. The window is formed by a window pane which can be lowered into the bottom part of a vehicle door, and can be moved by a window lifter. The pane is covered with an area having a limited conductivity formed by a layer of limited conductivity. An antenna connection point is formed between a horizontal sealing strip placed at the lower border of the window aperture and the window lifter in a free area which exists when the window is closed. The connection point is connected by high-frequency, low-loss means to the area of limited conductivity.

Abstract: An antenna diversity system for receiving frequency-modulated (FM) radio signals with the phase-controlled summation of antenna signals for motor vehicles equipped with a multi-antenna system having at least two antenna output signals, and a receiver with an input for each of a first and a second received signal path, wherein the second of the two received signal paths contains a phase-shifter controlled by a phase-controller. The received signal has the same phase on the output of the phase-shifter as in the first signal path. The two received signals are added up in a phase-coincident manner in a summation circuit, and the added-up signal is supplied to the FM frequency modulator.

Abstract: The radio system for remote control operation in a stationary vehicle includes a transmitter outside of the vehicle which transmits a predetermined high frequency radio transmission in a meter wavelength band designed to be received only by a receiver located in the vehicle to the receiver (1) in a predetermined radio channel. The radio system includes at least two receiving antennas (2a,2b) mounted on the vehicle (5), which are decoupled from each other in a diversity-type manner in a frequency band of the radio channel and a respective one of these antennas is connected to the receiver tuned to this frequency channel with the help of a selection circuit (3) during a ready mode of the receiver (1).

Abstract: An antenna installation for radio and television reception in motor vehicles in the meter and decimeter frequency wave ranges with a first antenna and-at least one additional antenna on the vehicle. The receiving signal available at each connection point of the antennas are combined in a collecting network. The signal then flows out of the collecting network to a reception point to form an overall receiving signal. The line and collecting network is designed to select the highest possible reception quality for a motor vehicle moving through a reception field based upon a statistical average.

Abstract: The invention relates to a mobile antenna for a plurality of radio services in the form of a dipole or monopole, with an antenna conductor and with at least one flatly designed roof capacity disposed substantially vertical relative to the antenna conductor for a first radio service with polarization disposed vertically relative to the roof capacity. The roof capacity is designed in the form of a conductive board or a thin conductive layer. In order to create an antenna function for at least one additional radio service with polarization oriented parallel with the roof capacitance, at least one slot is incorporated in the conductive board or layer with the slot length selected to form a suitable impedance bandwidth. In order to decouple signals of an additional radio service, first and second connection points are formed on the edges of the slot, wherein the connecting points oppose each other.

Abstract: An antenna disposed in a windowpane of a motor vehicle having an electrically conductive motor vehicle body having a direct current heating source. Disposed on the windowpane of the car is at least one heating field having at least one bus bar disposed on one side of the heating field. Connected to the bus bar at a connection point is a feeding network for feeding heating current into the bus bar. The feeding network is installed adjacent to the windowpane and comprises at least one magnetic core. Mounted on the at least one magnetic core is a primary winding which has a sufficient number of turns to transfer the high frequency, high impedance connection of the heating field. In addition, there is also a field compensation winding mounted on the at least one magnetic core, and is connected to a compensating current source so that this connection has no substantial effect in reducing inductive high resistence of this feed network and thus the high frequency reception of the antenna.

Abstract: A receiving antenna system for vehicles that eliminates interference in receiving signals. The interference detector is disposed within the receiver and generates and transmits an indicating signal, or a signal derived therefrom. Such signal can be formed in several different ways, and in the site of the antenna installation, it can be converted into a switching signal that only effects the switching condition in the antenna installation having a controllable switching circuit.

Abstract: A multiband radio antenna arrangement for use in two way radio communication for (UHF) and (SHF) frequencies. The antenna arrangement contains at least one emitter antenna mounted on the outside of the motor vehicle adjacent to an upper edge of the vehicle's windshield near its roof. Supporting the emitter antenna is a base plate secured adjacent to the roof of the vehicle, the baseplate being electrically conductive and serving as the electrical ground plane for the emitter antenna. A thin antenna line feeds into the antenna and extends from a connection point on the baseplate to the upper edge of the windshield where it is bent and then extended on the inside surface of the windshield through an adhesive bead of the window and into the interior of the vehicle. In addition, connected to the baseplate is a patch antenna connected to the antenna line, the patch antenna for receiving an additional radio communication service.

Abstract: An antenna for transmitting and/or receiving in the heating field of a window pane on a motor vehicle. The heating field has an HF-connection designed to couple or decouple high-frequency signals, and heating connections for feeding the heating power. An AC generator generates the heating wattage in the form of AC current, through a transformer. The heating power is supplied to the primary winding of the transformer and picked up on the secondary winding of the transformer and supplied to the heating field via heating connections. The primary winding and the secondary winding of the transformer are insulated to reduce the transmission of high frequency currents so that the heating field antenna does not have low resistance even at the lowest frequencies.

Abstract: The present invention relates to a high-frequency surgical generator (1) for adjusted cutting and coagluation having adjustment devices for setting the momentary electric output values, such as, e.g., current, voltage and power and having a device for direct and/or indirect determination of the state of the tissue in the vicinity of the cutting electrodes.

Abstract: A circuit for testing the function of mobile radio receiving installations is provided, wherein the circuit generates an HF-output signal that is used to test the system. A frequency mixer receives an oscillation signal (8) generated from within the superheterodyne receiver and an IF-carrier oscillation signal (32) generated from and oscillator (7) within the circuit. The frequency mixer generates an HF-output signal (12) that is dependent on the amplitude and frequency of the received oscillation signals. In alternative embodiments of the invention, the circuit of the invention is incorporated into the superheterodyne receiver, and the generated IF-carrier frequency 32 is eliminated and replaced with an IF-signal 22 produced by self-excitation of the superheterodyne receiver. With multi-antenna scanning diversity systems, additional switches and switching signals are included.

Abstract: A multiband radio antenna arrangement for use in two way radio communication for (UHF) and (SHF) frequencies. The antenna arrangement contains at least one emitter antenna mounted on the outside of the motor vehicle adjacent to an upper edge of the vehicle's windshield near its roof. Supporting the emitter antenna is a base plate secured adjacent to the roof of the vehicle, the baseplate being electrically conductive and serving as the electrical ground plane for the emitter antenna. A thin antenna line feeds into the antenna and extends from a connection point on the baseplate to the upper edge of the windshield where it is bent and then extended on the inside surface of the windshield through an adhesive bead of the window and into the interior of the vehicle. In addition, connected to the baseplate is a patch antenna connected to the antenna line, the patch antenna for receiving an additional radio communication service.

Abstract: An antenna for a windowpane or windshield, comprising a thin, electrically conductive layer flatly applied to an area of the windowpane. The layer is transparent to light and capable of reducing the transmission of heat through the windowpane, and creates a low-conductive area having non-negligible surface resistivity on the windowpane. Also provided is a substantially flat electrode made of highly conductive material, which is high-frequency connected with a reduced high frequency loss connected at at least one edge of said low-conductive layer, and also capacitively connected at high frequencies to an antenna connection point. The electrode is sufficiently long so as to minimize the loss created by the edge of the low-conductive layer. The low-conductive layer can also be sandwiched between glass panels such as in automotive safety glass and an additional electrode can be capacitively coupled to the main electrode.

Abstract: An antenna installation adapted for long-/medium-/short wave and television frequency ranges for use in a motor vehicle windowpane having a conductive window frame. The installation includes an antenna conductor disposed on the windowpane, an antenna conductor connection point located near the window frame and within the zone of the windowpane adhesive, which acts as a dielectric, and an electrical unit mounted on the windowpane. A receiving and transmitting unit is provided and an HF-cable is connected to the output contacts of the electrical unit at one end and to the receiving and transmitting unit at the other end. A flat capacitive element having a conductive surface located within the zone of the HF-mass reference point and extending along the edge of the windowpane within the windowpane adhesive provide the connection between the electrical unit and the antenna conductors.

Abstract: A system for controlling the operation of a high frequency biological tissue cutting device for cutting biological tissue with high-frequency current having a HF generator component designed so that the amplitude of the voltage (UG) applied to the tissue can be changed. At least one adjustment device is provided to adjust one of the characteristic values (K) of the high frequency generator component to a 1st desired value (b), related to the output of an indicator device that indicates by an electrical signal (d) the size and intensity of the electric arc occurring between the surgical probe and the tissue during cutting. A desired-value transmitter provides a second desired value (c) representing the desired size and intensity of the electric arc.

Abstract: The invention relates to an antenna with electrically low overall height, preferably for frequencies in the GHz-range.

Abstract: The present invention relates to a high-frequency surgical generator (1) for adjusted cutting and coagluation having adjustment devices for setting the momentary electric output values, such as, e.g., current, voltage and power and having a device for direct and/or indirect determination of the state of the tissue in the vicinity of the cutting electrode.

Abstract: A multi-antenna scanning diversity system uses an antenna diversity circuit adjacent to the antenna terminals, but remote from the receiver, whose input sees the antenna signals (A1) through (AN) and whose output provides a received signal selected by the diversity processor which then goes to the radio receiver via an bidirectional transmission line. The diversity circuit is also fed the radio receiver's IF signal scanned for interference by the diversity processor.In case of critical interference due to unfavourable reception conditions, the processor generates a switch signal causing another antenna to be selected.The system uses one common bidirectional transmission to conduct the RF signal from the diversity circuit to the radio receiver and the IF signal from the radio receiver back to the diversity circuit.