Limitation of human exposure to electromagnetic fields from devices operating in the frequency range 0 Hz to 300 GHz, used in electronic article surveillance (EAS), radio frequency identification (RFID) and similar applications

2010 ◽  
Keyword(s):  
Radio Frequency ◽  
Electromagnetic Fields ◽  
Radio Frequency Identification ◽  
Human Exposure ◽  
Frequency Range ◽  
Frequency Identification

scholarly journals Design of Meander-Line Antennas for Radio Frequency Identification Based on Multiobjective Optimization

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
X. L. Travassos ◽  
A. C. Lisboa ◽  
D. A. G. Vieira
Keyword(s):  
Radio Frequency ◽  
Method Of Moments ◽  
Radio Frequency Identification ◽  
Optimization Problem ◽  
Geometric Constraints ◽  
Frequency Range ◽  
Frequency Identification ◽  
Identification Tags ◽  
Problem Formulations ◽  
Meander Line

This paper presents optimization problem formulations to design meander-line antennas for passive UHF radio frequency identification tags based on given specifications of input impedance, frequency range, and geometric constraints. In this application, there is a need for directive transponders to select properly the target tag, which in turn must be ideally isotropic. The design of an effective meander-line antenna for RFID purposes requires balancing geometrical characteristics with the microchip impedance. Therefore, there is an issue of optimization in determining the antenna parameters for best performance. The antenna is analyzed by a method of moments. Some results using a deterministic optimization algorithm are shown.

Employing Ultrahigh-Frequency RFID Technology on Deer Farm Managment

2015 ◽  
Author(s):  
Liang Hsiao-Mei ◽  
Wang Chih-Hwa ◽  
Shann-Ren ◽  
Kang ◽  
Hsuuw Yan-Der ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Farm Management ◽  
Ultrahigh Frequency ◽  
Personal Digital Assistants ◽  
Rfid Technology ◽  
Uhf Rfid ◽  
Frequency Range ◽  
Frequency Identification ◽  
Rfid Readers

This project uses ultrahigh-frequency (UHF) ear tags and readers with a readable range of 3 to 5 m. Forty stags were tagged with radio-frequency identification (RFID) ear tags and allocated into 20 pens. When deer with RFID ear tags walked through the aisle, handheld RFID readers, used as personal digital assistants (PDAs), and stationary RFID readers in frequency range received signals from the tags, and individual deer tag data were transmitted immediately and completely through wireless PDAs to a computer. The inputted data were sent to the deer-farm management system to be collated and organized. Farmers obtained individual deer data without approaching the deer, which decreased the risk of the deer attacking. Employing UHF-RFID technology integrated with software contributes to enhancing the efficiency of deer identification and farm management.

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