ETRI Journal, vol. 36, no. 6, Dec. 2014
This figure shows an HF-RFID loop antenna with loop switch for avoiding magnetic coupling. The magnetic coupling between two adjacent loop antennas in an HF-RFID system can cause the system to malfunction. This practical antenna has a new loop switch to prevent such magnetic coupling. The antenna’s loop-switch circuit is integrated with a matching circuit and automatically operated by means of an interrogating signal from an RFID reader. See page 881.