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Electrical Engineering/Inductive powering of RFID technology

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Question
Hello Cleggsan,

How are you?
I have been reading about RFID technology, and found out that -
"Passive RFID tags have no battery. Instead, they draw power from the RFID reader, which sends out electromagnetic waves that induce a current in the tag's antenna."
I am interested in how this could be applied. Could an RFID tag drawing power from the RFID reader be used to supply power to another component that is connected to the tag? Is this type of thing ever done in any other situations?

I have also read that "a modern passive tag is designed to operate (at maximum range) on only 1 microwatt of power—typically, at a power supply voltage of 1V with a current drain of about 1 microamp." Is this saying the reader helps the tag generate 1V???

Every day brings more questions!

Domo arigato,
Eddie

Answer
RFID tags are used all over the place. They are little computer chips that run on very small amounts of power that are induced by a nearby magnetic field.  They are custom designed to work in proprietary situations and are not easily adapted to other uses without intense software and hardware engineering or applications testing. And, yes, they operate on very low levels of power input.  They are digital devices and are remote data storage devices generally speaking.

http://en.wikipedia.org/wiki/Radio-frequency_identification

There are many web pages about RFID applications, theory and practice.  Please google around and you will be surprised at the amount of information and the broad range of potential uses for them.

Doitashimashita  

Electrical Engineering

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cleggsan

Expertise

All technical areas of Electronics Engineering.

Experience

BSEE, MBA, Design, R&D, University Research.
Senior Life Member of IEEE. Life Fellow of AES.

Organizations
IEEE, Consumer Electronics Society, Audio Engineering Society.
Broad teaching experience; work experience mostly in consumer electronics and conversion from analog to digital technologies. Pioneer in digital audio at all levels.

Education/Credentials
BSEE (Equiv) BYU BSEE University of North Dakota MSBA (MBA) Illinois State University Graduate Studies in Computer Science - Bradley University Graduate Studies - Ohio University Graduate Studies - University of Missouri Kansas City DeVry Tech - Electronics

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