Radio frequency identification transponder employing patch antenna
US6215402A · kind A · utility
82Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2462
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A radio-frequency identification (RFID) transponder (tag) in accordance with the principles of the invention includes a patch antenna. The patch antenna may be co-located with RFID circuitry and an impedance matching circuit on one side of a substrate. A ground plane may be formed on the opposite side of the substrate. A quarter wave transformer may provide an "RF short" to ground to connect the RFID circuitry on one side of the substrate with a ground plane located on the opposite side of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.