Patent ID: 8723619

Claim:
A filter arrangement for filtering a radio transmit signal and a receive signal comprising: a first duplex filter, the first duplex filter comprising a first transmitter port, a first receiver port, and a first antenna port; a second duplex filter, the second duplex filter comprising a second transmitter port, a second receiver port, and a second antenna port; a transmitter signal splitting device for splitting a transmit input signal into a first transmitter signal portion and a second transmitter signal portion; a signal divider/combiner with a first signal divider/combiner port, connected to the first antenna port of the first duplex filter, and with a second signal divider/combiner port, connected to the second antenna port of the second duplex filter, the signal divider/combiner combining a first filtered transmit portion signal and a second filtered transmit portion signal into a single filtered transmit signal, which is provided at a third signal divider/combiner port of the signal divider/combiner, and for splitting the radio receive signal received at the third signal divider/combiner port into a first receive signal portion and a second receive signal portion, the first receive signal portion being provided at the first signal divider/combiner port and the second receive signal portion being provided at the second signal divider/combiner port; a signal combiner with a first signal combiner input port connected to the first receiver port of the first duplex filter, and with a second signal combiner port connected to the second receiver port of the second duplex filter, for combining a first filtered receive signal portion and a second filtered receive signal portion into a single filtered receive signal, which is provided at a third port of the signal combiner; at least a first amplifier with at least a first amplifier output connected to the first transmitter port of the first duplex filter; a compensation controller providing at least a first amplifier control signal to control at least one of an amplifying gain or a phase shift, wherein the compensation controller generates the first amplifier control signal in dependence of a signal provided at a fourth divider/combiner port of the signal divider/combiner.