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 ...

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 ...

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 ...

RF245, a 2.45GHz Long Range reader is uniquely designed for installations incorporating ... it provides high security to your long-range solution with an affordable price. Long-range RFID active cards ...