A Slot-based RFID Reader Antenna Design with Broad Left to Right Space Detections

In this paper, a low profile antenna for radio frequency identification devices (RFID) reader is proposed with the thickness of 15 mm and length of 450 mm. The antenna prototype is designed by etching a slot on the FR4 board supported by an alumina plate. Electromagnetic radiations will be generated within by the slot with a broad left to right spatial detection areas. Simulated and measured results show a good agreement on the working band from 886 MHz to 918 MHz, and far field radiation patterns with a maximal gain of 0 dBi. The tested results also satisfy with the practical requirements for applications.