A node (500, 600, 800, 1400, 1500, 1600) for use in a wireless communication system comprising at least two Tx-chains and at least two Rx-chains, each Tx-chain and each Rx-chain comprising an antenna end and a radio end, the antenna end being connected, directly or indirectly, to at least two sector antennas (101, 102, 103), each sector antenna being arranged to operate within a certain sector in space, each Tx-chain comprising means for a Tx-base band and a Tx-radio as well as a power amplifier, PA, connected in series and with the power amplifier being connected to one sector antenna directly or indirectly, each Rx-chain comprising means for an Rx-base band and an Rx-radio as well as a low noise amplifier, LNA, connected in series and with the low noise amplifier connected to one sector antenna directly or indirectly, each Tx-chain being arranged to operate within a transmit frequency band ftx and each Rx-chain being arranged to operate within a receive frequency band frx, wherein a first means for a switch and filter network function MSN (301, 401, 510, 610, 710, 810, 1410, 1510,1610) is connected in series across all Tx-chains before or after the power amplifiers, the first MSN comprising at least one adaptive filter and splitter means (501-503, 601-606, 801-803, 1401, 1501) having an input end and an output end, the output end of which is connected to an input end of at least one switch/combiner means (511-513, 611-613, 811-813, 1411-1413, 1511-1513), the first MSN being arranged to receive the at least one radio sector signal from the at least one Tx-chain, directly or indirectly, at the input end of its corresponding adaptive filter and splitter means (501-503, 601-606, 801-803, 1401, 1501) and to output from the output end of each of said switch/combiner means (511-513, 611-613, 811-813, 1411-1413, 1511-1513) one antenna sector signal, the antenna sector signal configurable as: • a radio sector signal from a corresponding Tx-chain, the radio sector signal being arranged to operate within the transmit frequency band ftx of the corresponding Tx-chain, or • at least two split radio sector signals from any of the Tx-chains, wherein the radio sector signal of at least one of the Tx-chains is split into at least two split radio sector signals, wherein each of the split radio sector signal of said at least one of the Tx-chains is arranged to operate within a part of the transmit frequency band ftx of the at least one radio sector signal from said at least one of the Tx-chains that is "a carrier part", wherein each "carrier part" of said at least one of the Tx-chains is different from one another and each different "carrier part" of said at least one of the Tx-chains is configured to be fed to a different sector antenna, the splitting of the radio sector signal by said adaptive filter and splitter means (501-503, 601-606, 801-803,1401,1501) being configured to allow one radio sector signal to feed sector antennas in more than one sector, each sector having at least one sector antenna, the adaptive filter and splitter means (501-503, 601-606, 801-803, 1401, 1501) and the switch/combiner means (511-513, 611-613, 811-813, 1411-1413, 1511-1513) of the first MSN being configurable in response to traffic load, thus being able to change the number of radio sector signals needed for supplying antenna sector signals to all sector antennas with respect to traffic load, thus allowing a complete, or part of a, Tx and/or Rx chain to be turned off for each reduction of a radio sector signal. • a radio sector signal from a corresponding Tx-chain, the radio sector signal being arranged to operate within the transmit frequency band ftx of the corresponding Tx-chain, or • at least two split radio sector signals from any of the Tx-chains, wherein the radio sector signal of at least one of the Tx-chains is split into at least two split radio sector signals, wherein each of the split radio sector signal of said at least one of the Tx-chains is arranged to operate within a part of the transmit frequency band ftx of the at least one radio sector signal from said at least one of the Tx-chains that is "a carrier part", wherein each "carrier part" of said at least one of the Tx-chains is different from one another and each different "carrier part" of said at least one of the Tx-chains is configured to be fed to a different sector antenna, the splitting of the radio sector signal by said adaptive filter and splitter means (501-503, 601-606, 801-803,1401,1501) being configured to allow one radio sector signal to feed sector antennas in more than one sector, each sector having at least one sector antenna, the adaptive filter and splitter means (501-503, 601-606, 801-803, 1401, 1501) and the switch/combiner means (511-513, 611-613, 811-813, 1411-1413, 1511-1513) of the first MSN being configurable in response to traffic load, thus being able to change the number of radio sector signals needed for supplying antenna sector signals to all sector antennas with respect to traffic load, thus allowing a complete, or part of a, Tx and/or Rx chain to be turned off for each reduction of a radio sector signal.