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Enhancing the efficiency of energy transfer to/from passive id circuits using ferrite cores

A technology of electromagnetic energy and efficiency, applied in the field of RFID tags, can solve problems such as reducing the reading range

Inactive Publication Date: 2010-12-15
MU GAHAT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various methods can be used to mitigate this interaction, but these strategies may reduce read range

Method used

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  • Enhancing the efficiency of energy transfer to/from passive id circuits using ferrite cores
  • Enhancing the efficiency of energy transfer to/from passive id circuits using ferrite cores
  • Enhancing the efficiency of energy transfer to/from passive id circuits using ferrite cores

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Embodiment Construction

[0027] The content described in this article is for improved radio frequency identification (RFID) reading technology. In the following description, for the purpose of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be obvious to those skilled in the art that the present invention as defined by the claims may include some or all of the features in these examples alone or in combination with other features described below, and may further include those described herein Modifications and equivalents of features and concepts.

[0028] The embodiment of the present invention is directed to RFID tags in a gaming environment. For ease of description, the game environment provides a context for describing an embodiment. It should be understood that the form factor of the RFID tag can be adjusted, and the RFID tag embodying the principles of the present invention can be used in an ...

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PUM

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Abstract

In one embodiment the present invention includes an RFID gaming token with a ferrite core. When the RFID gaming tokens are stacked, the ferrite cores steer the flux field from the excitation antenna through the center of the annular antennas in each token. The resulting flux field increases the efficiency of the energy transfer from the excitation antenna to the passive tags. This increased efficiency also improves the data transfer to and from the passive tags. This increased efficiency allows for reading RFID gaming tokens at a higher stack height (or at a better error rate for a given stack height) as compared to existing air core gaming tokens.

Description

Technical field [0001] The present invention relates to radio frequency identification (RFID) tags, and in particular, to an RFID tag having a ferrite core. [0002] This application claims to be filed on January 11, 2008 and is titled "Enhancing the Efficiency of Energy Transfer to / from Passive ID Circuits Using Ferrite Cores" The priority of U.S. Provisional Application No. 61 / 020,543, which is incorporated herein by reference. Background technique [0003] Unless otherwise indicated herein, the methods described in this section are not prior art to the claims in this application, and being included in this section does not mean that they are prior art. [0004] The quality factor (also called "Q factor" or "Q") is a dimensionless parameter that compares the time constant of the amplitude decay of an oscillating physical system with its oscillation period. Equivalently, the quality factor compares the frequency at which the system oscillates and the rate at which it dissipates en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/00
CPCH04Q2209/88H01Q7/08H04Q9/00H04Q2209/47G06K19/0723
Inventor 乔舒亚·K·霍伊特福里斯特·S·塞茨
Owner MU GAHAT HLDG