How Converters Can Make RFID Labels
Near-Field UHF
First there is the simple antenna possible with so-called near-field UHF. This has short range—typically only 30 centimeters—which is useful for distinguishing one product from another. It is not particularly affected by water or metal. The antenna is a simple printed ring pattern. Tagsys provides this on a strap the size of a postage stamp for converters to make into labels or they can print it themselves and use a conventional tiny strap for assembly. Combined near-field and far-field antennas can be put in a label with the converter printing the larger far-field antenna. It all adds value for the converter. In the Tagsys designs, the far-field antenna does not even have to be bonded electrically to the chip or the near-field antenna.
