Abstract: A circuit for changing over between the frequency-modulated HF signals of at least two receiving antennas is described, having a control unit that changes over between the individual antennas as a function of the quality of the antenna output signal. A detector is provided which, when a signal that exceeds the defined reception level is no longer being furnished by any of the antennas, applies to the control unit a signal that effects the changeover to a specific antenna.

Abstract: An antenna circuit is described which makes it possible to suppress intermodulation products. This antenna circuit includes an antenna connection device to which at least one first antenna can be connected, and the antenna connection device can be connected to an output of the antenna circuit over at least two signal paths. An antenna signal can be transmitted over each signal path. Transmission of a second antenna signal over a second signal path is attenuated by a predetermined attenuation value in comparison with a transmission of a first antenna signal over a first signal path. An analyzer unit is provided to determine the level of a weighting signal which is derived from an antenna signal transmitted to the output of the antenna circuit. An operating device is provided to connect only the first signal path to the output of the antenna circuit when the detected level is below a first predetermined level.

Abstract: A windshield antenna including, in particular, a multirange coupler for transmitting the L band and band III for DAB reception between an antenna base and a connecting module through a pane is described. An L band amplifier and/or printed circuit boards, whose surfaces facing the pane, which are designed to be conductive, form the capacitive transmitter, and whose opposite surfaces carry connecting and/or circuit elements, are provided in the connecting module. As an alternative or in addition, integration of a slot antenna in a capacitive transmitter can also be provided.