Patent ID: 9141836
Filing Date: 2015-09-22
Classification: G06K,H04B,H04L

Abstract:
1. An RFID reader, comprising: a transmitter section configured to transmit a first RF interrogation signal comprising a plurality of carrier frequencies effective to simultaneously illuminate a tag at the plurality of carrier frequencies; and a receiver section configured to simultaneously receive a second RF response signal comprising a plurality of carrier frequencies have having the same information substantially while the transmitter simultaneously illuminates the tag at the first RF interrogation signal comprising the plurality of carrier frequencies, wherein the transmitter section comprises a digital signal processor and a modulation stage, wherein the digital signal processor creates a baseband signal which is modulated at the modulation stage creating a plurality of signals each with a different frequency, the plurality of signals used in forming the first RF interrogation signal, wherein the receiver stage includes a plurality of downconversion stages so that the second RF response signal simultaneously undergoes a plurality of downconversions using the RF carrier frequency local oscillators from the transmitter section.