Your question is too vague to properly answer: Which part are you referring to: The Power transfer or the Data transfer? For the power transfer, both generate

Your question is too vague to properly answer: Which part are you referring to: The Power transfer or the Data transfer? For the power transfer, both generate an electromagnetic field, which is received by an antenna, then converted to DC by a Detector (eg a rectifier). So the principle is the same, but the details of the technology differs, as does the frequency, type of antenna, etc. There are many tutorials out there on the web if you care to do some research.