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Antenna for communication with a multitude of transponders

A technology of transponders and antennas, applied in the field of antennas and communication stations that communicate with multiple so-called radio frequency identification tags, can solve problems such as limited design conditions, and achieve the effect of improving communication and reliable acquisition

Active Publication Date: 2007-07-25
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when integrating such a transponder into a product equipped with it, any reduction in the distance between the antenna and the transponder is usually limited by design conditions

Method used

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  • Antenna for communication with a multitude of transponders
  • Antenna for communication with a multitude of transponders
  • Antenna for communication with a multitude of transponders

Examples

Experimental program
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Embodiment Construction

[0044] Figure 1a shows an antenna 1 with an antenna wire 2 for communicating with a plurality of transponders 6a..6c. For communicating with a plurality of transponders 6a..6c, the antenna 1 comprises three read / Write areas 4a..4c. The antenna wire 2 surrounds a continuous inner area 3 with constrictions 5a..5b between the read / write areas 4a..4c. For comparison, the dotted line represents an arrangement according to the prior art, which does not have any constriction 5a..5b. The effect achieved by providing the constriction 5a..5b is now that the antenna line 2 largely surrounds each read / write area 4a..4c. In this case, the read / write areas 4a..4c as well as the constrictions 5a..5b are composed of oppositely parallel sections of the antenna line 2 which are each connected by oblique extensions. For the antenna 1 with the constrictions 5a..5b the electromagnetic field strength in the read / write areas 4a..4c is higher but the inductance is lower compared to the configurati...

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PUM

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Abstract

An antenna (1) for communication with a multitude of transponders (6a..6c) is provided, the antenna (1) having an antenna conductor (2) which completely encloses at least one read / write region (4c) intended for a transponder (6c) individually and / or, when a multitude of read / write regions (4a, 4b) are arranged within a continuous inner region (3) enclosed by the antenna conductor (2), the inner region (3) has constrictions (5a) between the read / write regions (4a, 4b) so that the antenna conductor (2) largely encloses these read / write regions (4a, 4b) individually. The electromagnetic field radiated by the antenna (1) is thereby concentrated on the read / write regions (4a..4c).

Description

technical field [0001] The invention relates to an antenna for communicating with a plurality of transponders, in particular an antenna for communicating with a plurality of so-called radio frequency identification tags (RFID tags for short), the antenna having an antenna wire which surrounds a supply Multiple read / write areas used by transponders. [0002] The invention also relates to a communication system with an antenna according to the invention, and to the use of an antenna according to the invention or a communication station of this kind. Background technique [0003] Such RFID tags are known in the prior art and are generally used for storing data or for object identification. For example, consumer items are equipped with such tags in order to electronically reveal prices, ingredients, directions for use, etc. in a simple manner. The invention therefore generally relates to data carriers which can be read and written wirelessly. [0004] The above-mentioned RFID...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/22
CPCG06K7/10316H01Q1/22
Inventor 保罗·胡伯默尔克里斯蒂安·施韦尔
Owner NXP BV
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