Hand-made RFID Spy Chips?
Tuesday, April 17, 2012 at 3:33PM
Hitachi Chemical showed this chip @ the RFID Journal Live 2012 show. It's tiny and has a read-range of about 0.3 inches (1cm). But, what's cool about it is you can place a piece of foil or metalic thread and it will increase it's range to 2-5 feet (1-2 meters) depending on how you tune it.
We took a paper clip (6" long) and unfolded it.
All we needed to do was align a piece of the chip on the antenna and we extended the read range to 2 1/2 feet. We also tried it with a 12" and a 3" antenna. Neither of these gave the range of a 6".
Finally, we tried placing it on a metal laptop, but the tuning just doesn't work that way and we had no read range improvement. The interesting thing for this chip is easy embeding with metalic threads into textiles and ID badges, and documents.
TECH NOTES:
Hitachi indicates this tag can handle more than 1,000 cycles for -55C to 125C and short term to 260C for soldering applications and can survive 24 hours soaked in gasolie, tulene, and even plain old salt water.
It uses the Impinj M5 chip and has a 64-bit TID and 128-bit ID built in.
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