RFID systems in embedded applications

摘要

Badio frequency identification (RFID) is based on the transfer of data using electromagnetic fields to identify tags attached to objects. Information about an object is stored on a carrier device known as a tag or transponder, which consists of a built-in antenna and a chip containing the identifier data; see Figure 1. The data can either be a simple unique serial number, or more information about the object. As with a barcode, identification requires an electronic reader, but unlike barcode systems, the RFID reader can be in any orientation and not in a line of sight.