RFID DEVICES USING METAMATERIAL ANTENNAS

摘要

An EIR terminal can comprise a microprocessor, a memory communicatively coupled to the microprocessor, and a radio frequency identifier (RFID) reading device including an antenna having a composite right- and left-handed (CRLH) structure. The antenna can comprise one or more spatially separated conductive cell patches mounted on a dielectric substrate, a feed pad mounted on the dielectric substrate, one or more conductive feed lines connected to the feed pad, and one or more ground planes mounted on the dielectric substrate. One or more conductive feed lines can be spatially separated from one or more conductive cell patches. One or more conductive cell patches can be connected by one or more vias to one or more conductive via lines.