| 摘要 |
The invention relates to a circuit arrangement for compensation of the damping in an antenna feed cable for a mobile radio device. The circuit arrangement is suitable for operation in a radio network, whereby, within a frequency band, either the upper or lower of two defined frequency regions within the frequency band may be selected for transmission and the other frequency region used for receiving the radio signals. The arrangement comprises at least one signal branch for the amplification of HF signals for transmission in a corresponding circuit part, with a broadband type power amplifier, a signal branch for the amplification of received signals, with a broadband receiver amplifier, two filter and switch units arranged on the upstream and downstream sides of both signal branches of said circuit part, each with a frequency crossover and a signal switch and a detection and control unit for control of the signal switch. In the base state of the circuit part provided for transmission of the corresponding frequency region, received HF signals are always routed through the receiver amplifier irrespective of whether said signals belong in the upper or lower frequency region of the frequency band.
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