Apple Inc.
TRANSCEIVERS FOR A WIRELESS COMMUNICATION SYSTEM, MOBILE DEVICE, AND METHOD FOR IMPROVING TRANSCEIVER LOOPBACK CALIBRATION ACCURACY

Abstract:

A transceiver for a wireless communication system is provided. The transceiver includes a transmit path and a receive path. Further, the transceiver includes a loopback path operatively coupled between the transmit path and the receive path. The loopback path includes only passive elements for processing radio frequency signals, and no external energy source may contribute to a magnitude of the element's output. Accordingly, the loopback path may prevent the transmit path to the receive path leakage via a common supply or ground plane.