Abstract: A method for determining a connection status between an antenna amplifier and an antenna structure includes applying a first diagnostic voltage to a connecting link between the antenna amplifier and the antenna structure, reading out a first voltage value at a measuring point of the connecting link, and comparing the first voltage value with the first diagnostic value. The method includes applying a second diagnostic voltage different from the first diagnostic voltage to the connecting link, reading out a second voltage value at the measuring point, and comparing the second voltage value with the second diagnostic voltage. A faulty connection between the antenna amplifier and the antenna structure is determined if the first voltage value corresponds to the first diagnostic voltage and the second voltage value corresponds to the second diagnostic voltage.

Abstract: A compensator module includes a wanted-signal connection for transferring a plurality of wanted signals, a radio-frequency module for amplifying the wanted signals, a control-data connection for receiving a plurality of control data, and a processing unit processing the control data and driving the radio-frequency module. The control-data connection is connected to a digital data network. The processing unit switches the radio-frequency module between a compensator-module transmit operating mode and a compensator-module receive operating mode according to the control data.

Abstract: A multiple-antenna system for mobile uses in vehicles with several reception paths (10, 20, 30), each reception path (10, 20, 30) being associated with at least one respective antenna (11, 21, 31) and being set up for a first frequency band and at least one second frequency band, whereby according to the invention at least a third reception path (20) is provided that has an antenna (21) and that is set up to receive at least one further frequency band, conversion means being provided that converts the frequency band of one reception path (10) into a different frequency band and duplexing means are provided for transmitting both of the signals of the two frequency bands over a coaxial cable (41), separating means being provided to put the transmitted signals back into their respective frequency bands.

Abstract: The invention relates to an antenna system (1) comprising several antennae (2), which can be connected to at least two receivers (4, 4?) via a combination unit. According to the invention, a signal processing unit (5) for evaluating the output signals of the receivers (4, 4?) and a control unit (10) are provided, by means of which at least one of the antennae can be switched to transmit mode in order to conduct a self-test. These antennae (2) transmit test signals with a test frequency that is pre-set by a first receiver (4). Said test signals are fed into at least one other antenna (2) that, via the combination device (3), is connected to the second receiver (4?) whose frequency is tuned to the test frequency. In order to conduct the self-test, the receiving levels of the second receiver (4?) are recorded as actual values and compared with predetermined set values. This results in the realization of an antenna system in which a function check is conducted with the least possible amount of complexity.

Abstract: The invention relates to an antenna system (1) comprising several antennae (2), which can be connected to at least two receivers (4, 4′) via a combination unit. According to the invention, a signal processing unit (5) for evaluating the output signals of the receivers (4, 4′) and a control unit (10) are provided, by means of which at least one of the antennae can be switched to transmit mode in order to conduct a self-test. These antennae (2) transmit test signals with a test frequency that is pre-set by a first receiver (4). Said test signals are fed into at least one other antenna (2) that, via the combination device (3), is connected to the second receiver (4′) whose frequency is tuned to the test frequency. In order to conduct the self-test, the receiving levels of the second receiver (4′) are recorded as actual values and compared with predetermined set values.