Patent ID: 7933561

Claim:
Wireless communications circuitry comprising: transceiver circuitry comprising a first transceiver circuit and a second transceiver circuit, wherein the first and second transceiver circuits communicate using different communications protocols and a common radio-frequency frequency band; an antenna that handles radio-frequency signals in the common radio-frequency frequency band; a radio-frequency coupler comprising an input and first and second outputs; a first switch that is connected to the antenna and that has at least first, second, and third positions; and a second switch that is coupled between the first switch and the second transceiver circuit and that has at least first and second positions, wherein: when the wireless communications circuitry is operated in a first mode: the input receives radio-frequency signals from the antenna and simultaneously provides corresponding first and second reduced-power versions of the received radio-frequency signals to the first and second outputs, respectively; the first reduced-power version of the received radio-frequency signals is received by the first transceiver circuit; the second reduced-power version of the received radio-frequency signals is received by the second transceiver circuit; the first switch is placed in the second position to route radio-frequency signals from the antenna to the input of the radio-frequency coupler; and the second switch is placed in the first position so that the radio-frequency coupler is coupled to the second transceiver circuit; when the wireless communications circuitry is operated in a second mode: the first transceiver circuit is active and transmits radio-frequency signals through the first switch and the antenna without passing through the radio-frequency coupler; and the first switch is placed in the first position to route radio-frequency signals that have been transmitted from the first transceiver to the antenna; and when the wireless communications circuitry is operated in a third mode, the first switch is placed in the third position and the second switch is placed in the second position so that the antenna is coupled to the second transceiver.