A radio frequency module to be used in a base station, operating on a first frequency band, and comprising: a combiner port; a port of a first radio frequency channel connected to a first transmitting channel and a first receiving channel operating at a first frequency and a port of a second radio frequency channel connected to a second transmitting channel and a second receiving channel operating at a second frequency of the radio frequency module; a port for an antenna feeder or an indoor distribution system; and a band-pass filter, placed between the port of the first radio frequency channel and the port of the second radio frequency channel, the band-pass filter being adapted to filter out the first frequency and to pass the second frequency; wherein the second radio frequency channel is operating at a frequency different from the first radio frequency channel; wherein the port of the second radio frequency channel is directly connected to the combiner port and is adapted to be connected to another radio frequency module operating on a second frequency band, different from the first frequency band, via the combiner port; wherein the port of the first radio frequency channel is directly connected to the port for the antenna feeder or the indoor distribution system and the port for the antenna feeder or the indoor distribution system is connected to the antenna feeder or the indoor distribution system; characterized by: when the radio frequency module is configured to be in a set-in combiner mode, the second radio frequency channel is configured to be closed for the frequencies filtered out by the bandpass filter, the port of the second radio frequency channel is connected to the combiner port, and the combiner port is configured to serve as the combiner port for the other radio frequency module and is connected to the other radio frequency module; thereby implementing antenna feeder sharing of the two frequency bands; and when the first radio frequency channel is configured to be in an enabled state, the port of the first radio frequency channel is connected to the combiner port through the band-pass filter and the port for the antenna feeder or indoor distribution system is connected to the combiner port through the band-pass filter. a combiner port; a port of a first radio frequency channel connected to a first transmitting channel and a first receiving channel operating at a first frequency and a port of a second radio frequency channel connected to a second transmitting channel and a second receiving channel operating at a second frequency of the radio frequency module; a port for an antenna feeder or an indoor distribution system; and a band-pass filter, placed between the port of the first radio frequency channel and the port of the second radio frequency channel, the band-pass filter being adapted to filter out the first frequency and to pass the second frequency; wherein the second radio frequency channel is operating at a frequency different from the first radio frequency channel; wherein the port of the second radio frequency channel is directly connected to the combiner port and is adapted to be connected to another radio frequency module operating on a second frequency band, different from the first frequency band, via the combiner port; wherein the port of the first radio frequency channel is directly connected to the port for the antenna feeder or the indoor distribution system and the port for the antenna feeder or the indoor distribution system is connected to the antenna feeder or the indoor distribution system;