Title: Determining the three-dimensional read accuracy of an RFID tag using a power scaling factor

Authors: Charles E. Greene, Marlin H. Mickle

Addresses: Powercast Corporation, 566 Alpha Drive, Pittsburgh, PA 15238, USA. ' 348 Benedum Hall, University of Pittsburgh, Pittsburgh, PA 15261, USA

Abstract: It is beneficial in RFID applications to know where a tag can be successfully powered in a three-dimensional space. The research presented gives a method for efficient calculation of the powering volume of an RFID tag computationally facilitated by a newly developed power scaling factor. The method, when used in conjunction with the three-dimensional interrogator and tag antenna gains, can provide insight into the powering capability of the tag. Additionally, the power-scaling factor provides a new figure of merit that can be used to compare performance of RFID tags.

Keywords: radio frequency identification; RFID tags; 3D read accuracy; operational area; read range; figure of merit; Friis equation; power scaling factor; tag powering capability; tag performance evaluation.

DOI: 10.1504/IJRFITA.2011.040991

International Journal of Radio Frequency Identification Technology and Applications, 2011 Vol.3 No.3, pp.155 - 165

Published online: 18 Mar 2015 *

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