Retromodulation method of a contactless communication, and corresponding transponder
US11824599B2 · kind B2 · utility
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20Claims
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Assignee
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Key dates
| Filing date | Dec 3, 2021 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Mar 9, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A contactless communication method comprises retro-modulation of a carrier signal received at the terminals of an antenna in an alternation of modulated states and unmodulated states. The modulated state comprises a modulation of a load at the terminals of the antenna at zero impedance, and the transitions from the modulated state to the unmodulated state are controlled at an instant determined by a first delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.