Phase alignment of carrier signals of communication devices

摘要

RFID apparatus includes transmission means for transmitting an RF signal; reception means for receiving a modulated RF signal; and demodulation means for demodulating a received modulated signal. The apparatus comprises generating means for generating a RF signal dependent on an incoming RF signal, the incoming RF signal being generated by different apparatus, and the apparatus is arranged to transmit the generated RF signal such that the generated RF signal interferes with the incoming RF signal. The RFID apparatus has both the means to respond to an RF reader device, in tag emulation mode, and means to function as an RF reader device, in reader mode.

主权项

1. A method for selectively operating a first communication device having an antenna, comprising:
inductively receiving, by the first communication device, a first carrier signal from a second communication device using the antenna; aligning, by the first communication device, a phase of a second carrier signal with a phase of the first carrier signal; and inductively coupling, by the first communication device, the second carrier signal to the second communication device using the antenna to transmit the second carrier signal to the second communication device.