This application discloses a communication apparatus and system. In the communication apparatus, a first phase difference coupler is coupled to a third phase shifter and a fourth phase shifter, and is coupled to a cross coupler and a first combiner; and a second phase difference coupler is coupled to a fifth phase shifter and a sixth phase shifter, and is coupled to a second phase shifter and a second combiner. A second output port of the first phase difference coupler is coupled to a first input port of the cross coupler, a first output port of the second phase difference coupler is coupled to an input port of the second phase shifter, and an output port of the second phase shifter is coupled to a second input port of the cross coupler. An input port is coupled to an input port of the third phase shifter, an input port of the fourth phase shifter, an input port of the fifth phase shifter, and an input port of the sixth phase shifter. An output port is coupled to an output port of a first phase shifter and an output port of the second combiner. When beamforming is performed by using the communication apparatus, a quantity of used phase shifters can be reduced, a plurality of beams can be flexibly adjusted and controlled, and independent scanning by each beam can be implemented.