ANTENNA SWITCH AND ANTENNA SWITCHING METHOD THEREOF

摘要

PURPOSE: An antenna switch and an antenna switching method thereof are provided to attenuate the electric wave of an RFID(Radio Frequency IDentification) readers by providing impedance matching through first and second impedance matching circuits. CONSTITUTION: An RFID system(2) includes an RFID reader(12), an RFID tag, an antenna switch(20) and antennas(14a-14p). The antenna switch electrically connects the RFID reader to one of the antennas. The antennas are arranged on a shelf(16), and the RFID reader reads out the data of the RFID tag through the antennas. The RFID readers immediately obtains the state change of the articles on the shelf, and the RFID system is electrically connected to at least 4 sets among the antennas through the antenna switch.