End load for microwave ovens
US3983356A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1974 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Apr 30, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/264
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An end load for a microwave oven for efficiently attenuating microwave energy escaping from an oven access port. The end load has a circular configuration and consists of an inner cylindrical member and a concentrically mounted, outer conductive member. The members are spaced apart to provide a tuned annular volume through a lossy liquid, such as water, is passed. The inner member is made of a microwave lossy material having a dielectric constant that optimumly matches the energy transfer from air to water and has a wall thickness that is also tuned to trap microwave energy. The outer member is made of a conductive material that provides an inwardly reflective surface for confining the microwave energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.