How RFID Works

how-RFID-works-rfid-blogA passive UHF system usually have 4 main components: the tag, antenna, reader, and host PC.

The reader scans each antenna attached to it so that once a tag enters the field of one of the antenna, it is first powered up. Once fully powered, the tag “backscatters” its information which the antenna can then pick up. This is the most delicate part of any system, since this is where interference comes into play: liquids absorb the projected signal while metals will reflect it. Depending on what you are labeling, where the tag is placed, and how many items you are trying to read at once, the performance of any system will greatly vary.

In the cases where the tag is powered and read properly, the data on the tag is processed by the reader and sent onto your host PC. On your host you would be running some type of software to then put the read tag information to use. This could be an asset tracking software, an inventory management system, or even an event tracking application.

Like barcodes, RFID tags are a simple identifier but the tags can be read faster and automatically without line-of-site or orientation concerns. Since each tag will have a unique number on it, the ways you track items will only be limited by your needs and software capabilities.