Communications: radio wave antennas – Antennas – With support for antenna – reflector or director
Reexamination Certificate
2007-02-23
2010-06-01
Dinh, Trinh V (Department: 2821)
Communications: radio wave antennas
Antennas
With support for antenna, reflector or director
C343S891000, C343S757000, C343S904000, C340S572100
Reexamination Certificate
active
07728786
ABSTRACT:
A system to capture a remote RFID electro magnetic interrogation of a warehouse or distribution center environment through the propitious use of an external directional antenna. The system comprises a directional external yagi antenna affixed to the exterior of the distribution center or warehouse distribution center; an electric motor attached to a boom of the external yagi antenna to enable the antenna to change direction; a directional finding equipment spliced to the circuit of the external yagi antenna, and multiple transformers, the antenna and interrogation units mounted to a ceiling of the warehouse or distribution center to modulate and reradiate signals of the remote microwave or ultra high frequency interrogation to interrogate transponders attached to articles at the articles' resonant frequency and re-radiate responses to the external yagi antenna for capture by the cellular transmission tower.
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Sung-Ho Kim, Young-Bac Ko, A Directional Antenna based Path Optimization Scheme for Wireless Ad Hoc Networks, College of Information and Communication, Ajou University, South Korea.
Linxuan Hu, David Evans, Using Directional Antennas to Prevent Wormhole Attacks, Department of Computer Science, University of Virginia, Charlottesville, VA.
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