This application discloses a signal sending circuit, a signal receiving circuit, an electronic apparatus, and a base station. The circuit includes a signal pre-processing sub-circuit, a digital-to-analog conversion sub-circuit, an intermediate frequency power splitter, K frequency conversion phase-shift sub-circuits, and K antenna elements. An output end of the signal pre-processing sub-circuit is connected to an input end of the digital-to-analog conversion sub-circuit, an output end of the digital-to-analog conversion sub-circuit is connected to an input end of the intermediate frequency power splitter, an output end of the intermediate frequency power splitter is connected to input ends of the K frequency conversion phase-shift sub-circuits, and output ends of the K frequency conversion phase-shift sub-circuits are connected one-to-one to input ends of the K antenna elements. In embodiments of this application, when a capacity of a communication system is increased by increasing a quantity of independent beams, a quantity of intermediate radio frequency channels does not need to be increased, so that costs of the communication system can be reduced to some extent.