Low- and high-frequency RFID tags are usually passive or semi-active tags. These tags are less than one full wavelength away from the RFID reader and must modulate the wave produced by the reader into ...

Similarly, asset tracking capabilities of both passive and active RFID tags help operators locate needed equipment and other items far more rapidly than any human search could ever achieve.

Here’s an open source RFID cloner design that is about the same size as a standard RFID key card. It doesn’t need a battery to capture key codes, just the magnetic field generated by an RFID ...

Image credit: Advanced Infrastructure The way in which the reader perceives the RFID tag depends on whether the tag is active or passive. Active tags periodically transmit the tag's RF signal, which ...

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 ...