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Reader Antenna (reader + antenna)

Distribution by Scientific Domains
Engineering100%

Selected Abstracts

UHF RFID near field reader antenna for item level applications

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 5 2010
Jeong-Seok Kim
Abstract A UHF band near-field antenna using microstrip lines and stubs for tagging stacked tags in a smart table is presented. It is shown that a suitable near-field reader antenna can be designed from signal lines, ground lines, and several stubs to generate coupled electric and magnetic fields. The proposed near-field reader antenna satisfactorily operates in a UHF radio frequency identification (RFID) smart table, and the measurements show that the antenna is capable of detecting 200 stacked tags in a reading area of 200 mm × 190 mm and achieves a detection rate of 97% when the tags are stacked in a smart table. The proposed UHF RFID smart table is successfully implemented for casino chip management. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1116,1119, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25115 [source]

Wide coverage area of UHF-band RFID system using a pattern reconfigurable antenna

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 9 2007
Hanphil Rhyu
Abstract A new type of a reader antenna for a UHF-band RFID system is proposed to cover a wider area. The proposed antenna consists of a circular polarized patch element, an omnidirectional electrical loop element, and a feeding network. By combining two antenna elements whose radiation patterns and half-power beamwidths (HPBW) are different from each other, the coverage area of the RFID system is increased. The experimental results show the proposed antenna has a HPBW of more than 120° and works well in the UHF band RFID system. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2154,2157, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22694 [source]

Radio frequency identification (RFID) performance: the effect of tag orientation and package contents

PACKAGING TECHNOLOGY AND SCIENCE, Issue 1 2006
Robert H. Clarke
Abstract The objective of this research was to determine the relationship between different product types and tag orientations on the readability of RFID tags on shipping containers in a palletload that is driven through a portal type reader. This research finds that the content of packages can dramatically reduce the read rate. Only 25% of the tags on shipping containers containing water-filled bottles could be read. Rice-filled jars had a higher read rate (80.6%). Even empty boxes did not have a 100% read rate. For the variables without appreciable package contents, only 74,79% of loads had all of their tags read. The orientation of the tag does make a difference, especially when coupled with a filled package between it and the reader antennae. Tags facing outwards, towards the reader antennae, had the highest likelihood of a successful read. When tags for the boxes of water-filled bottles were all facing downwards, no tags were read. Supply chain managers need to understand these limitations of the technology and find ways to overcome them before RFID can be successfully implemented in supply chains. Copyright © 2005 John Wiley & Sons, Ltd. [source]