Miniature Transponder and Identification System Including Said Transponder and a Suitable Reader
First Claim
1. A transponder containing a winding of conductive wire coiled on a generally cylindrical ferrite bar and connected to an integrated circuit of identification by radiofrequency waves, said transponder comprising a winding made of a single layer of non-contiguous turns, formed with an uninsulated wire, and an integrated circuit operating at a frequency higher than 10 MHz, said integrated circuit being directly attached to the ferrite bar, so as not to exceed the cylindrical volume determined by the bar and the winding.
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Accused Products
Abstract
The transponder contains a winding of conductive wire coiled on a generally cylindrical ferrite bar and connected to an integrated circuit of identification by radiofrequency waves. The winding is made of a single layer of non-contiguous turns, formed with an uninsulated wire, and the integrated circuit is set up to operate at a frequency higher than 10 MHz and is directly attached to the ferrite bar, for example, on a flat part formed at the end of the bar, so as not to exceed the cylindrical volume determined by the bar and the winding. The reader contains a transmitting antenna formed by a flat winding and a receiving antenna with at least two wire assemblies disposed in flat spirals, each assembly containing two flat spirals wound in opposite directions.
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Citations
18 Claims
- 1. A transponder containing a winding of conductive wire coiled on a generally cylindrical ferrite bar and connected to an integrated circuit of identification by radiofrequency waves, said transponder comprising a winding made of a single layer of non-contiguous turns, formed with an uninsulated wire, and an integrated circuit operating at a frequency higher than 10 MHz, said integrated circuit being directly attached to the ferrite bar, so as not to exceed the cylindrical volume determined by the bar and the winding.
Specification