Electronic price label antenna for electronic price labels of different sizes
US6184834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0414
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic price label which is suitable for use in both small EPLs having lengths of about 1.5 to 2 inches and large size EPLs having lengths of about 3 to 4 inches. The antenna includes a folded planar conductor including a generally planar radiator portion coupled to a antenna port on a printed circuit board, a generally planar ground plane portion coupled to a ground on the printed circuit board having a width and oriented generally parallel to the radiator portion, and a dielectric layer between the radiator portion and the ground plane portion. The width of the ground plane portion is larger than the width of the radiator portion by a distance sufficient to produce an electric field which is linearly polarized in the width direction, thereby eliminating a need for shielding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.