Multi-frequency band antenna feeder sharing method and base station radio frequency unit

A multi-frequency band antenna feeder sharing method, wherein a first radio frequency module works in a frequency band 1, a second radio frequency module works in a frequency band 2, comprising at least one of the following:

• when the first radio frequency module works in set-in combiner mode, receiving, through an antenna feeder connected to a port of a first radio frequency channel, a signal of a frequency band 1 and a signal of a frequency band 2 from the port of the first radio frequency channel of the first radio frequency module, transmitting the signals of the frequency band 1 and the frequency band 2 to a band-pass filter set in the first radio frequency module and filtering the signals so as to obtain the signal of the frequency band 2, and transmitting the signal of the frequency band 2 to a port of a third radio frequency channel of the second radio frequency module through a port of a second radio frequency channel serving as a combiner port in the first radio frequency module;
• and
• when the first radio frequency module works in set-in combiner mode, sending, by the second radio frequency module, the signal of the frequency band 2 to the port of the second radio frequency channel serving as the combiner port in the first radio frequency module through the port of the third radio frequency channel of the second radio frequency module, transmitting the signal of the frequency band 2 that has passed through the band-pass filter connected to the port of the second radio frequency channel to the port of the first radio frequency channel of the first radio frequency module, and sending out the signal of the frequency band 2, together with the signal of the frequency band 1, through the antenna feeder connected to the port of the first radio frequency channel.