Power divider having frequency selection characteristic

The present invention relates to a power divider having a frequency selection characteristic, including: a ground layer and a circuit layer; the circuit layer includes an input port, a first output port and a second output port; the circuit layer further includes a first shunt circuit line and a second shunt circuit line that are disposed between the input port and the first output port and between the input port and the second output port, and configured to distribute a power; the circuit layer further includes a first short circuit line connected to the first shunt circuit line and configured to introduce a nonlinear impedance, and a second short circuit line connected to the second shunt circuit line and configured to introduce the nonlinear impedance; and the first short circuit line and the second short circuit line are connected to the ground layer. The present invention not only can improve the problem of a wide horizontal beam in a low frequency band of the base station antenna, but also can suppress the phenomenon of a narrow beam in a high frequency band of the base station antenna.