Electromagnetic energy seal of a microwave oven
US4700034A · kind A · utility
11Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1986 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Apr 2, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/763
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microwave leakage shielding apparatus of microwave oven which can cut off the leakage of high-frequency electromagnetic wave as well as that of second harmonic. The slot antenna is installed in such a manner that a serial resonant circuit is provided within the attenuating cavity of the choke installed in the door of microwave oven. Also, the apparatus can reduce the thickness of door by performing the one-quarter impedance inversion in the nearer position then .lambda./4 through the serial resonant circuit, thereby enlarging the capacity of heating room.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.