Triple Band Printed Modified Bow-tie Antenna for RFID Reader/ISM Applications

A modified bow-tie antenna, which finds potential use in Radio Frequency Identification (RFID) / Industrial, Scientific and Medical (ISM) applications, is proposed. Triple band operation is facilitated by applying trapezoidal truncations on both arms of the bow-tie antenna. The major attractive feature of the proposed antenna is its improved bandwidth for triple band operation particularly in different RFID bands. A considerable size reduction of the patch area is also achieved for the proposed structure. The simulated results for the return loss characteristics are in good agreement with the measured results.