Mobile radio frequency identification (mRFID) reader

Communications: electrical – Selective – Interrogation response

Reexamination Certificate

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Details

C340S010100, C340S010300, C340S572400, C455S060000, C455S139000, C455S276100

Reexamination Certificate

active

07825773

ABSTRACT:
A mobile radio frequency identification (mRFID) reader having a receiving circuit is provided. The receiving circuit includes a local oscillator which generates a carrier signal at a predetermined frequency band; a mixer which mixes a tag signal received from a tag with the carrier signal, to lower a frequency of the tag signal; a phase adjusting block which adjusts a phase of the carrier signal by determining a phase of the tag signal; and a control block which processes the tag signal through a series of operations, and controls an operation of the phase adjusting block to compensate for a phase delay of the tag signal according to an output of the processed tag signal. Because the mRFID reader can be provided as small as a half size of a related art reader, a mobile communication terminal accommodating the mRFID reader can be compact-sized. Additionally, because the number of components for the receiving circuit decreases, not only the power consumption but also the unit price can be reduced.

REFERENCES:
patent: 5974301 (1999-10-01), Palmer et al.
patent: 6107910 (2000-08-01), Nysen
patent: 7023817 (2006-04-01), Kuffner et al.
patent: 7155172 (2006-12-01), Scott
patent: 7199713 (2007-04-01), Barink et al.
patent: 7652577 (2010-01-01), Madhow et al.
patent: 2004/0069852 (2004-04-01), Seppinen et al.
patent: 2006/0192655 (2006-08-01), Levin

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