A high-frequency amplifier (12) amplifies the high-frequency signals input to the input terminals.

To this antenna board (310), on its ground plane side, a second circuit board (321) is attached by means of a rigid protective frame (410), which second circuit board includes the other parts of the radio-frequency front end.

The invention relates to an integrated structure of a radio-frequency front end of a communications apparatus.

This technique may be applied to adaptively equalize the channels of a linera amplification with nonlinear components (LINC) style radio frequency (RF) amplifier.

The invention relates to a radio transmitting apparatus (1), in particular for a mobile radiotelephone service, of a first predetermined power stage, the radiation power of which can be enhanced by connection of an HF-amplification circuit.

A system for controlling a bias circuit by sensing RF amplifier output power and compensating for a dominating quiescent bias current includes an amplifier transistor and two sampling transistors.

The radio transmitting apparatus (1) has an antenna output (5), to which an input (10) of an HF amplification circuit (15) can be connected, for operating the radio transmitting apparatus (1) in a higher, second power stage.

Distributors (13) distribute the high-frequency signals amplified by the high-frequency amplifier (12).