Abstract: A reception system for motor vehicles having a diversity antenna system with a plurality of antennas and an antenna switch coupled to a receiver for the reception of digital, MPSK-modulated satellite and terrestrially broadcast radio signals containing phrase reference signals. The antenna diversity system optionally switches through at least one of two available antennas and has a signal level testing device with its input coupled to the receiver and its output coupled to the antenna switch. This is to provide an indication for the need for antenna switching to avoid signal loss by means of a signal at its output, whereby the phase reference signals occur repeatedly in a time sequence.

Abstract: There is disclosed an antenna for reception of circularly polarized satellite radio signals. The antenna comprises at least one two-dimensional or three-dimensional antenna conductor structure connected with an antenna output connector. The multi-dimensional antenna conductor structure is configured so that it comprises a plurality of antenna conductor sections, which, with reference to a spatial reference point (z) common to the antenna conductor sections, are disposed in pairs, symmetrically and extending in the same direction.

Abstract: There is disclosed an antenna diversity system for relatively broadband broadcast reception in vehicles such as motor vehicles. The device can include a diversity processor having numerous components including a microprocessor for controlling a signal selection switch. In alternative embodiments the processor can be incorporated into a receiver or into a multi-antenna system. One advantage of these designs is that it is able to exist with one reception tuner and being able to select one signal from a plurality of antenna signals A1, A2, . . . AN, with great probability, whose signal components lie above the level necessary for interference-free reception, over the entire channel bandwidth B.

Abstract: There is an antenna diversity system for radio reception in moving vehicles which includes a receiver, and at least two antennas coupled to the receiver. These antennas transmit antenna feed signals to an antenna diversity module coupled between the receiver and the antennas. In at least one embodiment, the antenna diversity module comprises at least one evaluation circuit for evaluating an interference in a reception signal, and at least one processor for adjusting a magnitude em and a phase angle of a linear combination of the antenna feed signals. The evaluation circuit reads and sends an interference indication signal to the processor to create a relatively low interference signal. Thus, the diversity module combines the antenna feed signals in an adjustable manner based on an magnitude of phase angle, to form a linear combined signal that is present at the output of the antenna diversity module as a reception signal.

Abstract: A diversity processing system for providing interference masking signals in an interference suppression circuit. These interference masking signals are generated by an interference detector which through a coupling element couples in a signature signal into a reception signal. This reception signal is then passed to an amplifier, an optional frequency converter, an IF filter, a frequency demodulator and then on to an interference suppression circuit which provides a masking pulse to mask any distortion or interference associated with the diversity switching of antennas during operation.

Abstract: An antenna configuration is provided for radio reception in motor vehicles, the roof region of which is made predominantly of dielectric materials, and for motor vehicles having roof structures that can be collapsed for open driving operation. The antenna configuration includes a combination of emitters that are integrated into elements of the roof region, with emitters that are disposed in cavities of the interior paneling essentially below the belt line of the vehicle. A ground connection is provided for emitters that are disposed in a roof structure having movable elements by way of at least one resilient contact between movable metal components of the roof structure and the metal car body. Also included is a switching system for alternating operation of the emitters.