Compact Yagi antenna for handheld UHF RFID reader

This paper describes a compact linearly polarized high gain antenna for a handheld UHF RFID reader. The antenna is a Yagi type structure, with three elements (driver, director, and reflector) which fit into compact footprint (100 mm × 100 mm). The antenna has maximum gain of 6 dBi and VSWR better than 1.3 in approximately 50 MHz band around either European or US RFID bands (865-870 MHz or 902-928 MHz). We describe the antenna structure and present the comparison of simulation results with experimental data.