Amplifier arrangement

Amplifier arrangement for transmitting and receiving a broadband signal, said amplifier arrangement comprising:

• a resistive receive hybrid means adapted to pass a receive hybrid signal selected from the group consisting of combinations of a received signal and a transmitted signal, signals function of the received signal and of the transmitted signal, and combinations thereof,
• a resistive transmit hybrid means that is adapted to pass a transmit hybrid signal corresponding substantially only the transmitted signal or a portion thereof or a function thereof,
• a tuneable gain means adapted for converting the transmit hybrid signal into a gained transmit hybrid signal corresponding substantially to the reverse of or substantially equal to a portion of the receive hybrid signal corresponding to or function of the transmitted signal passing through the receive hybrid means, and/or for converting the receive hybrid signal into a gained received hybrid signal, the portion of which is function of the transmitted signal corresponding to the reverse of or being substantially equal to the transmit hybrid signal or to a function thereof,
• signal treatment means adapted to add or subtract the gained transmit hybrid signal to and/or from a signal selected from the group consisting of the receive hybrid signal, a gained receive hybrid signal and/or a function thereof, and/or to add or subtract the gained receive hybrid signal to and/or from a signal selected from the group consisting of the transmit hybrid signal, a gained transmit hybrid signal and/or a function thereof, whereby said treatment is adapted for generating a signal which is substantially independent of the transmitted signal or a function thereof.