A method and apparatus for splitting signals received via a plurality of antennas. A signal split apparatus of the present disclosure includes a first antenna which receives a first input signal, a second antenna which receives a second input signal, a first phase shifter which shifts phase by applying a first modulation frequency to the first input signal, a second phase shifter which shifts phase by applying a second modulation frequency to the second input signal, a summer which sums the phase-shifted first and second input signals, and an analog-digital converter which converts the summed signal to a digital signal, wherein the first and second modulation frequencies are different from each other. The signal split apparatus and method of the present disclosure is capable of splitting signals efficiently.