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Making RFID mainstream

On its surface, radio frequency identification technology may seem simple: A data reader gathers information from an information-embedded chip, with an antenna enabling the transfer of data via the radio frequency.

The physics related to the antenna is where things can get complicated and challenging. Overcoming those challenges is a key to bringing the price......

Full article >>> ated, and that will affect their performance on various substrates, particularly metals and liquid-filled containers.

Finally, interference among tags as well as from surrounding objects can cause the equivalent of fading, an effect much like what you hear when your FM radio is tuned to a weak station as you drive through a city.

For some applications, larger antennas, embedded i......

Full article >>> enna orientation and loading, what the substrate does to the EM fields.

Still, we must make sophisticated measurements of those antennas to confirm our predictions. Such measurements are done using RF instruments like network analyzers and performed in anechoic chambers that both shield out other interfering signals and dampen reflections from the test antennas to approach the ideal of s......

Full article >>> lection and interference that can confound reads in otherwise valid applications.

It is the goal of our laboratory to understand the physical layer, the antennas, RF propagation and the RF environment, so that we can advance the state of RFID systems. We want to turn the clock forward as rapidly as we can without too much expensive blind experimentation.

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