Electromagnetic shield
US4703133A · kind A · utility
Inventor
Key dates
| Filing date | Jun 5, 1986 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Jun 5, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K9/0015
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic shield for shielding against electromagnetic interference in a manner similar to a solid metal shield having a thickness of several skin depths. In all of the disclosed embodiments, a plurality of electrically-conductive closed rings or loops are arranged in a predetermined relationship, to conduct current inducted by electromagnetic energy received from an exterior interference source or an interior signal source. The special ring or loop configuration causes the induced current to concentrate in the portions of the rings closest to a surface adjacent to the source of the electromagnetic energy, to enhance the shielding. One set of embodiments is suitable for use in a sheet material for housings or enclosures, while another set is suitable for use in the joints between mating coaxial conductors or between adjacent sheets of metal. Still another embodiment is suitable for use as a flexible or rigid cable shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.