Patent ID: 8036627

Claim:
Bidirectional signal mixer adapted to operate according to two modes, a reception mode, combining a radioelectric signal S RF+IM comprising a frequency component RF and an image component frequency IM with a signal S FOL of frequency F OL to produce a signal S F , of intermediate frequency FI, an emission mode, combining a signal S FI of intermediate frequency FI with a signal S FOL of frequency F OL to produce a radioelectric signal S RF , the mixer comprising: four mixing cells, each being adapted to combine two signals to produce an output signal converted in frequencies with respect to the first of the two signals, a first phase shifting means adapted to dispatch the signal S FOL on each mixing cell, a second phase shifting means adapted, in the reception mode, to dispatch the power of the signal S RF+IM on each mixing cell, a third phase shifting means adapted, in the reception mode, to combine the signals from said mixing cells to produce a signal S F , free from a frequency component IM, combined signals comprising image frequency components IM in opposite phase and frequency components FI in phase, the third shifting means being also adapted, in the emission mode, to dispatch the power of the signal S FI on each mixing cell and the second phase shifting means being also adapted, in the emission mode, to combine the signals from the said mixing cells to produce a radioelectric signal S RF free from the frequency component F OL , the combined signals comprising frequency components F OL in opposite phase and frequency components RF in phase.