Eye-Shaped Segmented Reader Antenna for Near-Field UHF RFID Applications
An Eye-Shaped Segmented (ESS) antenna is presented for Ultra-High Frequency (UHF) near-field Radio Frequency IDentification (RFID) applications. The proposed antenna shows in-phase current even though the perimeter of the eye-shaped loop is comparable to the operating wavelength. The ESS antenna is fabricated on a FR4 Printed Circuit Board (PCB) and embedded in a metal cavity with an overall size of 250x180x50mm3. The measured bandwidth is around 11MHz (860-871MHz) under the condition of VSWR less than 2.0, which covers the Europe standard (865MHz-868MHz) and agrees well with the simulated results.