Broad bandwidth, high impedance transponder for electronic identification system
US6891466B2 · kind B2 · utility
13Cited by
6References
11Claims
0Family size
Inventors
Key dates
| Filing date | Jun 18, 2001 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Aug 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0421
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transponder 14.1 for an electronic radio frequency identification system comprises an antenna 18 having an antenna impedance at a feedpoint thereof. The transponder further comprises an electronic circuit 19 having an input connected to the antenna. The antenna impedance having impedance characteristics for developing first and second voltage maxima (36, 38) across the input at first and second frequencies (fL and fH) respectively, thereby to provide a continuous operative frequency band for the transponder including the first and second frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.