Patent ID: 8233853

Claim:
A transmission circuit for radio frequency signals, comprising a power mixer, which the power mixer comprises a radio frequency input port, a first radio frequency output port, a second radio frequency output port and a dummy load port, wherein the radio frequency signals reflected back to the power mixer from the first radio frequency output port and radio frequency signals reflected back to the power mixer from the second radio frequency output port cancel each other out at said radio frequency input port, and are emitted from the dummy load port; the transmission circuit for radio frequency signals further comprising a first switch unit and a second switch unit, wherein, the first switch unit is connected to the first radio frequency output port for emitting the radio frequency signals outputted from the first radio frequency output port, or for reflecting the radio frequency signals outputted from the first radio frequency output port back to the first radio frequency output port; and the second switch unit is connected to the second radio frequency output port for emitting the radio frequency signals outputted from the second radio frequency output port, or for reflecting the radio frequency signals outputted from the second radio frequency output port back to the second radio frequency output port.