Patent ID: 7155172
Filing Date: 2006-12-26
Classification: G06K

Abstract:
1. An RFID backscatter interrogator for transmitting data to an RFID tag, generating a carrier for the tag, and receiving data from the tag modulated onto the carrier, the interrogator comprising: a synthesizer integrated circuit including first and second RF synthesizers having respective synthesizer outputs; circuitry configured to toggle between the first and second RF synthesizers to effect frequency hopping; an AM/FM radio demodulator integrated circuit; an RF mixer, coupled between the synthesizer integrated circuit and the AM/FM radio demodulator integrated circuit, and configured to mix data with a carrier frequency which the AM/FM demodulator integrated circuit is configured to demodulate; and a single grounded-coplanar wave-guide circuit board supporting at least the synthesizer integrated circuit, the AM/FM radio demodulator integrated circuit, and the RF mixer.