ANTENNA SYSTEM AND RFID TERMINAL USING THE SAME

摘要

PURPOSE: An antenna system and an RFID terminal including the same are provided to implement circular polarization and linear polarization by changing the phase in a dual feeder by an antenna with polarization diversity effect. CONSTITUTION: An antenna(100) has two patch surfaces(120,140) and two feeding points(162,164) connecting the patch surfaces. A feeding module supplies the signal to the antenna by differently controlling the phase of the signal according to a time domain and includes a feeding circuit and a timing controller. The feeding circuit supplies the signal to the antenna by controlling the phase of the signal. The timing controller determines the signal supply and the phase according to the time domain. Two patch surfaces are overlapped in parallel. Two feeding points have a linear shape to connect two patch surfaces vertically.