Low cost RFID system
First Claim
Patent Images
1. A reader/writer for use in Radio Frequency Identification Systems comprising:
- an oscillator;
a power splitter operatively connected between said oscillator and an antenna system, said power splitter further operatively connected to a mixer, said power splitter configured to receive input from said oscillator and to transmit a signal to said antenna system and to said mixer;
said mixer configured to receive input from said oscillator through said power splitter and input from said antenna system and to transmit a signal to another location.
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Abstract
A low cost close range RFID Reader/Writer which is operatively connected to a control device which contains a transmitter and is configured to function as a homodyne receiver. The device can be constructed from low cost parts and can function in close ranges to other tags. The present invention provides increased RFID identification and isolation properties and is suitable for inclusion and operative use with a variety of applications.
57 Citations
17 Claims
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1. A reader/writer for use in Radio Frequency Identification Systems comprising:
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an oscillator;
a power splitter operatively connected between said oscillator and an antenna system, said power splitter further operatively connected to a mixer, said power splitter configured to receive input from said oscillator and to transmit a signal to said antenna system and to said mixer;
said mixer configured to receive input from said oscillator through said power splitter and input from said antenna system and to transmit a signal to another location. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A reader/writer for use in a Radio Frequency Identification System comprising:
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an oscillator operatively connected between a processor and an amplifier;
said amplifier operatively interconnected between a processor and a low current filter;
said low current filter operatively connected to a directional coupler, said directional coupler also operatively connected to an antennae and to a mixer, said mixer operatively connected to said processor through a series of gates and filters whereby said reader acts as a transmitter and homodyne receiver and can send and receive information. - View Dependent Claims (8, 9)
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10. A system for reading and verifying radio frequency identification system tags comprising:
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a control device;
at least one RFID tag;
a sensor operatively connected to said control device, said sensor positioned so as to be activated when an object passes through a designated location;
a RFID reader/writer, operatively connected to said control device, said RFID reader/writer comprising a controller operatively connected to an RF oscillating transmitter;
a power splitter operatively connected to a phase delay device between said RF oscillator and an antennae system said power splitter configured to receive input from said RF oscillator and to transmit a signal to said antennae system and to a mixer;
said mixer configured to receive power from said power splitter and input from said antenna system and to transmit said signal to another location, said control device configured to receive input from said sensor said scanner and said RFID reader and to perform the steps of a designated method. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification