Title :
Microstrip patch antenna array for range extension of RFID applications
Author :
Abbak, Mehmet ; Tekin, Ibrahim
Author_Institution :
Fac. of Eng. & Natural Sci., Sabanci Univ., Istanbul
Abstract :
In this paper, an UHF band 2times2 microstrip phased antenna array is designed for extending the range of an RFID reader system. The phased antenna array operates at the frequency of 867 MHz, as specified in Gen2 protocol European standards. The phased antenna array has four microstrip patch antennas, three Wilkinson power dividers and a transmission line phase shifter printed on the same Arlon AD450 substrate with a dielectric constant of 4.5 with dimensions of 34times45 cm. The phased array antenna has a measured directivity of 9.5 dB and the main beam direction can be switched between the angles of plusmn 40 degrees with a 3dB beamwidth of 90 degrees. The phased antenna array can be used to extend the RFID system working range.
Keywords :
UHF antennas; UHF phase shifters; antenna phased arrays; microstrip antenna arrays; microwave phase shifters; permittivity; power dividers; radiofrequency identification; Arlon AD450 substrate; Gen2 protocol European standard; RFID reader system range extension; UHF band phased antenna array; Wilkinson power dividers; dielectric constant; frequency 867 MHz; microstrip patch antenna array; transmission line phase shifter; Antenna arrays; Frequency; Microstrip antenna arrays; Microstrip antennas; Microwave antenna arrays; Patch antennas; Phased arrays; Protocols; Radiofrequency identification; UHF antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619086
