Title :
Forward and reverse link constraints in UHF RFID with passive tags
Author :
Kuester, Daniel G. ; Novotny, David R. ; Guerrieri, Jeffrey R.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
This paper examines the relative roles of the forward and reverse links in determining the operational range of passive UHF RFID systems. Simple free space examples in free space show when the forward or reverse link may be the main range constraint in practical systems, depending on reader and tag characteristics. Measurements of transmission and scattering off of a dipole in a real environment demonstrate showed different multipath effects; transmission power fading squared disagreed with backscattered fading in the test environment by up to 8 dB within a measurement range of 2 m.
Keywords :
UHF circuits; passive networks; radio links; radiofrequency identification; backscattered fading; dipole; distance 2 m; forward link constraints; gain 8 dB; passive UHF RFID systems; passive tags; reverse link constraints; transmission power fading; Antenna measurements; Dipole antennas; Fading; Radiofrequency identification; Scattering; UHF measurements;
Conference_Titel :
Electromagnetic Compatibility (EMC), 2010 IEEE International Symposium on
Conference_Location :
Fort Lauderdale, FL
Print_ISBN :
978-1-4244-6305-3
DOI :
10.1109/ISEMC.2010.5711359
