Patent ID: 7340280

Claim:
A base station of a cellular telecommunication system, comprising: an antenna unit configured to receive and transmit radio frequency signal; an electronically tunable diplexer connected to the antenna unit configured to separate a transmit radio frequency band from a receive radio frequency band, a tuning range of the electronically tunable diplexer covering at least two radio frequency sub-bands used in the same transmission direction in a telecommunication system, the electronically tunable diplexer being tunable, on site, to a radio frequency sub-band allocated to a base station according to an electric control signal; a transceiver connected to the electronically tunable diplexer configured to perform a conversion between a fixed frequency band and the radio frequency sub-band allocated to the base station; and wherein the transceiver includes a signal conversion chain configured to perform at least a portion of the conversion, at least a portion of the signal conversion chain being shared between frequencies within the tuning range of a sub-band.