Provided by: Creative Commons
Date Added: Nov 2014
In this paper, an UHF band 2x2 microstrip phased antenna array is designed and implemented to extend the coverage of an RFID reader system. The phased antenna array has three Wilkinson power dividers four microstrip patch antennas and a transmission line phase shifter printed on the dielectric substrate with a dielectric constant of 4.5 and on dimensions of 34x45cm array operating at the frequency of 867MHz, as specified in RFID Gen2 protocol European standards. The phased array antenna has a measured directivity of 12.1dB and the main beam direction can be steered to the angles of 40 degrees with HPBW of 90 degrees.