RFID antenna circuit
US8749390B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2009 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Jan 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention concerns an RFID/NFC antenna circuit. An antenna (L) is formed by at least three turns (S), the antenna having a first end terminal (D) and a second end terminal (E), two access terminals (1, 2) to connect a charge, a tuning capacitance (C1, ZZ) for tuning at a prescribed tuning frequency, an intermediate tap (A) connected to the antenna (L) and distinct from terminals (D, E), a first connector (CON1A) connecting the intermediate tap (A) to terminal (1), a second connector (CON2E) connecting end terminal (E) to the capacitance terminal (C1E). A third connector (CON31, CON32) connects the capacitance terminal (C1X) and the second access terminal (2) respectively to a first point (P1) of the antenna (L) and to a second point (P2) of the antenna (L) connected to the first point of the antenna (L) at least one turn (S) of the antenna (L).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.