Transponder system for communicating through an RF barrier
US5523750A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Sep 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10336
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
RF communication through an RF barrier is facilitated by an RF field concentrating core that is lodged within an opening through the barrier and extends out from at least one side of the barrier. An antenna coil is wound around the core, with a capacitor connected across the coil to establish a parallel resonant circuit at the exciting frequency. The core/coil combination provides a bidirectional RF coupler for transmitting signals between opposite sides of the barrier. It is particularly useful for transponder systems in which a transponder is located within an RF-blocking enclosure, and is interrogated by an exciter/reader outside the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.