TRANSMISSION/RECEPTION MODULE OF A VEHICLE
The disclosure relates to a transmission/reception module of a vehicle that comprises a transmission/reception unit for radio-frequency signals, an amplifier unit, which is connected downstream of the transmission/reception unit by means of a cable connection, and at least one antenna configured to relay a radio-frequency transmission signal and to receive a radio-frequency received signal. The disclosure provides for the amplifier unit to be a second control loop of the transmission/reception module (in addition to the known control loop) and, to this end, to comprise a variable amplifier, as the control element of the second control loop, to regulate the output power of the radio-frequency transmission signal relayed by the at least one antenna, as the controlled variable of the second control loop.
1 . A transmission/reception module for a vehicle, the transmission/reception module comprising a transmission/reception unit for radio-frequency signals, having an amplifier unit, which is connected downstream of the transmission/reception unit by means of a cable connection, and having at least one antenna configured to relay radio-frequency transmission signals and to receive radio-frequency received signals, wherein the amplifier unit is a second control loop of the transmission/reception module having a variable amplifier, as a control element of the second control loop, to regulate output power of a radio-frequency transmission signal relayed by the at least one antenna, which output power is a controlled variable of the second control loop.
2 . The transmission/reception module as claimed in claim 1 , wherein the variable amplifier of the amplifier unit is an attenuation selector having variable power attenuation and is a power amplifier having constant power gain that interacts with the attenuation selector.
3 . The transmission/reception module as claimed in claim 2 , wherein the at least one antenna configured to relay radio-frequency transmission signals is arranged at an amplifier output of the amplifier unit in a manner integrated in the amplifier unit.
4 . The transmission/reception module as claimed in claim 2 , wherein the at least one antenna configured to relay radio-frequency transmission signals is connected to an amplifier output of the amplifier unit via a cable connection.
5 . The transmission/reception module as claimed in claim 2 , wherein in an initialization phase after the transmission/reception module is switched on the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level.
6 . The transmission/reception module as claimed in claim 5 , wherein in the initialization phase the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level based on signal attenuation, which is dependent on cable length of the cable connection between the transmission/reception unit and the amplifier unit.
7 . The transmission/reception module as claimed in claim 5 , wherein in the initialization phase the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level based on minimum possible signal attenuation, which is dependent on cable length of the cable connection between the transmission/reception unit and the amplifier unit.
8 . The transmission/reception module as claimed in one of claims 5 , wherein in an operating phase of the transmission/reception module that follows the initialization phase the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level only inside of a specific control window for the output power of the radio-frequency transmission signal.
9 . The transmission/reception module as claimed in claim 8 , wherein inside of the control window for the output power of the radio-frequency transmission signal the amplifier unit, as the second control loop, regulates the output power of the radio-frequency transmission signal differently according to control difference for the output power of the radio-frequency transmission signal.
10 . The transmission/reception module as claimed in claim 8 , wherein an output power of the radio-frequency transmission signal outside of the control window results in the transmission/reception unit, as a first control loop, connected upstream of the second control loop, of the transmission/reception module, adjusting the output power of the radio-frequency transmission signal to a defined power level in the operating phase of the transmission/reception module.
11 . The vehicle comprising at least one transmission/reception module as claimed in claim 2 .
12 . The vehicle comprising at least one transmission/reception module as claimed in claim 1 .
13 . The transmission/reception module as claimed in claim 1 , wherein the at least one antenna configured to relay radio-frequency transmission signals is arranged at an amplifier output of the amplifier unit in a manner integrated in the amplifier unit.
14 . The transmission/reception module as claimed in claim 1 , wherein the at least one antenna configured to relay radio-frequency transmission signals is connected to an amplifier output of the amplifier unit via a cable connection.
15 . The transmission/reception module as claimed in claim 1 , wherein in an initialization phase after the transmission/reception module is switched on the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level.
16 . The transmission/reception module as claimed in claim 15 , wherein in the initialization phase the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level based on signal attenuation, which is dependent on cable length of the cable connection between the transmission/reception unit and the amplifier unit.
17 . The transmission/reception module as claimed in claim 15 , wherein in the initialization phase the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level based on minimum possible signal attenuation, which is dependent on cable length of the cable connection between the transmission/reception unit and the amplifier unit.
18 . The transmission/reception module as claimed in claim 15 , wherein in an operating phase of the transmission/reception module that follows the initialization phase the amplifier unit, as the second control loop, adjusts the output power of the radio-frequency transmission signal to a defined power level only inside of a specific control window for the output power of the radio-frequency transmission signal.
19 . The transmission/reception module as claimed in claim 18 , wherein inside of the control window for the output power of the radio-frequency transmission signal the amplifier unit, as the second control loop, regulates the output power of the radio-frequency transmission signal differently according to control difference for the output power of the radio-frequency transmission signal.
20 . The transmission/reception module as claimed in claim 18 , wherein an output power of the radio-frequency transmission signal outside of the control window results in the transmission/reception unit, as a first control loop, connected upstream of the second control loop, of the transmission/reception module, adjusting the output power of the radio-frequency transmission signal to a defined power level in the operating phase of the transmission/reception module.