US Patent 10127486 Multi-frequency and single side band RFID methods of communication

MFQRFID, (Multi-Frequency RFID, for purposes of this document) utilizes legacy RFID circuitry adding at least a second transmitter (xmit) and receiver (rec) tuned to a second frequency, through a second antenna array allowing a single core modem, power management and processing/memory to share the at least two xmit/rec channels. Thereafter, the two channels, being on different frequencies, may be independently selected by the RFID circuitry based on signal strength of the communicating external device.