Design of a dipole tag antenna enclosed by a short-stub for UHF RFID application

Abstract

The proposed antenna has the impedance bandwidth of 10 MHz ( 907 MHz ∼ 917 MHz ) for S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf> less than −10 dB and the power transmission coefficient of 0.999 at 912. The proposed antenna is compact in size ( 64.1 mm × 17.8 mm ) and has the merit of easy conjugate matching to any commercial tag chips by adjusting either the length or the width of short-stub enclosing the dipole.