Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 7, Issue -, Pages 718-720Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2008.2000813
Keywords
Artificial magnetic conductor (AMC); radio frequency identification (RFID); tag antenna
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A low-profile (approximate to lambda/100) passive radio frequency identification (RFID) tag antenna incorporated with a compact artificial magnetic conductor (AMC) substrate is proposed. A novel modified rectangular patch type AMC substrate with offset vias is employed to significantly reduce the planar dimensions of a tag antenna, which is about 0.1 lambda x 0.2 lambda. The effect of a ground plane size and the number of AMC unit cells on the antenna performance such as return loss and gain is investigated with a view of tag installation. It is demonstrated through experiments that the proposed tag antenna shows relatively tolerant reading distances from 2.4 to 4.8 m under various platform environments such as a conductive plate or a plastic water container.
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