RFID TAG ANTENNA

摘要

An RFID(Radio Frequency Identification) tag antenna is provided to maintain a uniform recognition distance by minimizing a characteristic variation due to a metal object. An RFID tag antenna includes a radiation patch unit(1000), a feed patch unit(1002), and a stub(1004). The stub is electromagnetically coupled with the feed patch unit. The stub is symmetrically formed in a feed direction of the feed patch unit. A length of the stub and a distance between the stub and the feed patch unit are set based on a band-pass characteristic and a resonance frequency. The RFID tag antenna further includes at least two parasitic patches at both sides of the radiation patch unit.