Communication method and apparatus with reduced power consumption in a multi-antenna environment

A communications apparatus, comprising an antenna unit, a phase correction unit, a first analog bridge, and a second analog bridge, wherein

• the antenna unit comprises at least two first antenna arrays and at least two second antenna arrays;
• the first analog bridge comprises a first input end and at least two first output ends, the first input end is connected to a first radio frequency channel, and each first output end is connected to one first antenna array;
• the second analog bridge comprises a second input end and at least two second output ends, the second input end is connected to a second radio frequency channel, and each second output end is connected to one second antenna array;
• a first signal is sent to the first input end by using the first radio frequency channel, and is divided into at least two channels of first sub-signals by using the first analog bridge, and the at least two channels of first sub-signals are respectively output from the at least two first output ends to the at least two first antenna arrays;
• a second signal is sent to the second input end by using the second radio frequency channel, and is divided into at least two channels of second sub-signals by using the second analog bridge, and the at least two channels of second sub-signals are respectively output from the at least two second output ends to the at least two second antenna arrays;
• and
• a first channel of first sub-signal in the at least two channels of first sub-signals and a first channel of second sub-signal in the at least two channels of second sub-signals are coupled to the phase correction unit by using a coupler, and the phase correction unit sends an adjusted signal to a corresponding radio frequency channel, so that a phase of the first channel of first sub-signal is the same as a phase of the first channel of second sub-signal.