| 摘要 |
An RF interface for interfacing between a differential transceiver and at least two antenna ports, which transceiver has at least two receive inputs for receiving RF signals from the at least two antenna ports and at least two transmit outputs for transmitting RF signals to the at least two antenna ports. A multiplexing device is provided for interfacing between the transceiver and the at least two antenna ports and selectively interface transmitted RF signals to one or both of the at least two antenna ports or selectively interface received signals from one or both of the at least two antenna ports to respective receive inputs of the transceiver. A controller is provided for controlling the multiplexer to operate in either a receive mode or a transmit mode and, in the receive mode, operate in either a single ended mode to interface one of the at least two antenna inputs to one of the inputs of the transceiver or a differential mode to interface both of the at least two antenna inputs to respective inputs of the transceiver. A matching network controlled by the controller matches the impedance of the at least two antenna ports to the input of the transceiver when in the receive mode, and operable to select between at least two different antenna impedances.
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