Performance Analysis Of 915 Mhz Rfid System Operating In A Fluorescent Lighting Environment

Radio Frequency Identification (RFID) has been widely utilized in retail stores and manufacturing environments, and sometimes without any consideration to environmental RF interference that can hinder its operation. Fluorescent lights, specifically the electronic ballast controlled, are found to be a common source of interference. They act as radio frequency (RF) signal reflectors which may introduce undesirable effects on the backscattered signals from RFID tags. A project was conducted within the electronics engineering technology (EET) program as a partial requirement in the RF Effects and Measurements course. A 915 MHz RFID system was installed and operated, and its performance was investigated and analyzed in an environment abundant with electronic ballast controlled fluorescent lamps. It was found that the backscattered RF signals emanating from the fluorescent lamps interferes considerably with the tag-to-reader signal and hinders the ability of the reader to detect tag information. This projectbased approach introduced the students to state of art technology in RF wireless communication, provided a practical hands-on learning opportunity, and developed their ability to analyze and provide solutions for real life problems. The paper presents the experimental findings, their analysis, and the project educational outcomes. " Introduction Projects investigating state of art technology are of vital importance for the graduating engineering technologists. In addition to the theoretical knowledge provided through the classical lectures and labs approach, these projects are valuable learning tools that provide a venue for the students to utilize their knowledge effectively, acquire in-depth understanding of the concepts, think critically, and independently analyze real life problems. In the Radio Frequency (RF) Effects and Measurements course two students were assigned a 3 week project as a partial course requirement. The aim was to investigate the performance and reliability of a Radio Frequency Identification (RFID) system operating in an environment abundant with electronic ballast driven fluorescent lamps. As a guideline the instructor introduced the group to the basic RFID concepts, the design concepts of the electronic ballast control of fluorescent lamps 1 , and the results of previous research work 2, 3 . Their task was to carry out further analysis and investigation, based on the research results, verifying their work through practical implementation on an operating RFID system.