摘要：Field strength and field distribution are major factors in obtaining reliable data link between RFID tag and reader. The UHF RFID has become one of the major factors in RFID applications due to its wide range of 10m and high frequency of 2.45 GHz. In Forklift trucks, the geometry and environmental conditions are not static. Due to this the field strength is affected. So it is very much necessary to measure the field strength in such applications. In this paper forklift truck designed and is attached with an UHF (Ultra High Frequency) RFID reader. The variations in field strength are measured through simulation in HFSS (High Frequency Structure Simulator). Initially a rectangular patch antenna of 900MHz is considered as RFID reader antenna. Later the antenna models used in the RFID reader are varied and the results are compared to see which antenna model is least affected by the geometry and environment factors. Thereby a better knowledge is obtained on the type of antenna used in the RFID reader for better performance.
关键词：UHF RFID; HFSS; Antenna models. least affected
