Ultra-High Resolution Reflective Vector Synthesizer for Radio Frequency Identification (RFID) Systems

Abstract

Techniques for ultra-high resolution reflective vector synthesis in RFID systems include a transceiver configured to transmit an initial signal, one or more memories, one or more processors, and a cancellation signal synthesizer comprising a variable impedance device. The cancellation signal synthesizer receives a power amplifier output sample associated with the initial signal, splits the power amplifier output sample into a first signal directed along a first pathway and a second signal directed along a second pathway, and delays the first signal to cause the first signal to be out of phase with the second signal. The one or more processors execute instructions stored in the one or more memories to cause the RFID systems to determine at least one signal characteristic of a cancellation signal based on the first signal and the second signal and cause the cancellation signal synthesizer to generate the cancellation signal to cancel a reflected signal.

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