The Reader simply receives the Tag data transmission ... The following download is a compilation of 12 companies who have integrated RFID, inc. active tags to improve their businesses.

For other applications, passive RFID tags can be read up to approximately 10 feet away, while active tags with batteries can be several hundred feet from the reader. Linear polarized antennas ...

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The fact that this tag doesn’t have an onboard transmitter to transmit its own signal independent of an RFID reader, however, means the range is still limited when compared to an active tag.

If you’ve worked with passive RFID before, you know that most readers only work within inches of the card. In [Fran’s] DEFCON talk this summer he calls it the “ass-grabbing method” of ...

I would approach the RFID reader using a variation on this circuit ... tunnel diodes, or other active components, you lateral thinkers. It must demonstrably read a 125 kHz RFID tag placed within ...

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The waves reach the tag's antenna and power the chip, which then sends its data to the reader in a process called "backscatter." Average cost for these is about $0.12 per tag in bulk. Active RFID ...