RADIO FREQUENCY IDENTIFICATION NEAR-FIELD ANTENNA SYSTEM

摘要

PURPOSE: A radio frequency identification (RFID) near-field antenna system is provided to dynamically control a reflection condition of an end of a near-field antenna, thereby removing a shadow area generated in the near-field antenna. CONSTITUTION: A signal providing unit (10) provides a signal inputted from an RFID reader. An antenna unit (30) receives the signal from the signal providing unit and forms a near-field. A variable reflection port (40) changes a reflection condition of the signal inputted in the antenna unit by being connected to the antenna unit. The antenna unit includes a first transmission line and a second transmission line. A ring hybrid includes a first port connected to a transmission unit of the signal providing unit, a second port connected to the first transmission line, a third port connected to the second transmission line, and a fourth port connected to a reception unit of the signal providing unit. [Reference numerals] (10) Signal providing unit; (30) Antenna unit; (40) Variable reflection port