The present invention relates to a repeater antenna. According to an aspect of the present invention, provided is the repeater antenna which comprises: a circuit board; a radiator formed on one surface of the circuit board and configured to transceive a signal; a power feed unit formed on one surface of the circuit board to be connected to the radiator and configured to apply a signal to the radiator; a coaxial cable electrically connected to the power feed unit to supply an electrical signal to the power feed unit; and electromagnetic wave absorption patterns formed on both sides of the coaxial cable. Therefore, the repeater antenna can improve an isolation rate between a service antenna and a donor antenna.
