Patent ID: 8441964

Claim:
A feeding device for a smart antenna, the feeding device comprising: a signal reception terminal, for receiving a transmission signal; a first antenna feeding terminal, for outputting a first feeding signal to a first antenna; a second antenna feeding terminal, for outputting a second feeding signal to a second antenna; a first impedance; a second impedance; a power divider, having a first input port, a second input port, a first output port, and a second output port, for distributing energy received by the first input port or the second input port equally to the first output port and the second output port, and making signals of the first output port and the second output port have 90 degree phase difference; and a switching circuit, for switching connection states between the power divider and each one of the signal reception terminal, the first antenna feeding terminal, the second antenna feeding terminal, the first impedance and the second impedance according to a control signal.