Printed-circuit impedance control using skewed reference mesh
US7504904B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Jan 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09681
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printed circuit laminate is provided comprising at least one conductor trace for carrying forward electrical signals in a first direction of signal propagation. The printed circuit laminate also comprises a mesh reference plane, spaced from the at least one conductor trace, for carrying return electrical signals in a second direction. The mesh reference plane defines a plurality of cells. Each cell of the plurality of cells includes at least one axis of repetition. The plurality of cells are configured so that all of the axes of repetition of each cell are different from the first direction of signal propagation. Furthermore, the frequency of cell repetition along the first direction of signal propagation is chosen to reduce differences in transmission line impedance between any two conductors on the same laminate or any two conductors on different laminates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.