Patent ID: 7796955

Claim:
An expandable wireless transceiver, comprising: an antenna, for detecting an electromagnetic signal from surrounding space and receiving a signal with a first central frequency according to the detection result; a receiver, coupled to the antenna for receiving the signal delivered by the antenna; a transmitter, for outputting a radio-frequency signal with a second central frequency; and a switch connector, having a first connection terminal coupled to the transmitter, a second connection terminal coupled to the antenna and a third connection terminal, wherein the third connection terminal provides an connective path to an expansion antenna, and the first connected terminal delivers the radio-frequency signal with the second central frequency to the second connection terminal or the third connection terminal according to the coupling condition of the third connection terminal, wherein the expandable wireless transceiver transmits the radio-frequency signal with the second central frequency to surrounding space through the antenna or the expansion antenna, and the second central frequency and the first central frequency are both in a specific band.