Noncontact recording medium reader/writer
US7457637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2004 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Nov 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10316
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The object of the invention is to provide a noncontact IC card reader/writer integrated with an antenna that does not require the limitation of an installation location and the adjustment of a resonance frequency of the antenna, is convenient in installation, is provided with a stable characteristic, is small-sized and low-priced. To achieve the object, the invention is provided with a loop antenna that supplies electric power and send data to a noncontact IC card by electromagnetic induction and acquires receive data from the noncontact IC card by load fluctuation, a magnetic body arranged closely at the back of the loop antenna, a first metallic plate arranged on the back side of the magnetic body and a second metallic plate arranged on the back side of the first metallic plate and larger than the first metallic plate in size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.