Antenna for communication with a multitude of transponders

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

2005-07-13

2009-08-04

Chen, Shih-Chao (Department: 2821)

Communications: electrical

Condition responsive indicating system

Specific condition

C343S742000, C343S867000

Reexamination Certificate

active

07570168

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).

REFERENCES:
patent: 6814284 (2004-11-01), Ehlers et al.
patent: 2003 142927 (2003-05-01), None

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