System for signal transmission by magnetic induction in a near-field propagation mode, with antenna tuning for link budget optimization
US8452233B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 2007 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Mar 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/266
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal transmission system (STS) comprises a transmitter (T) with a first LC circuit comprising a first coil (C1) intended to be fed with signals having a chosen carrier frequency, and a receiver (R) with a second LC circuit comprising a second coil (C2) and coupled to a circuit front-end (FE). The first coil (C1) is arranged to transfer energy to the second coil (C2) by magnetic induction in a near-field propagation mode. The first LC circuit (C1) has an increased quality factor and is tuned to a first frequency which is shifted in a first direction from the carrier frequency by a first value, and the second LC circuit (C2) has an increased quality factor and is tuned to a second frequency which is shifted in a second direction, opposite to the first one, from the carrier frequency by a second value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.