F - Mech Eng,Light,Heat,Weapons – 24 – C
Patent
F - Mech Eng,Light,Heat,Weapons
24
C
327/2.3
F24C 7/02 (2006.01) H05B 6/76 (2006.01)
Patent
CA 1224536
MICROWAVE OVEN DOOR SEAL ABSTRACT OF THE DISCLOSURE A microwave oven door seal arrangement for inhibiting micro- wave energy leakage employs an energy splitting and phase shifting device disposed proximate the door gap formed between the access opening to the oven cavity and the oven door. The energy splitting and phase shifting device initially splits the energy attempting to escape through the door gap between two intersecting transmission paths. An inner intersection is provided near the inner edge of the gap relatively near the cavity, at which point the energy splits between the two paths. An outer intersection is provided near the outer edge of the door gap relatively remote from the cavity, at which point the energy propagating along the two paths recombines. The paths differ in effective electrical length between these intersections by an odd integral multiple of one-half the wavelength of the energy resulting in a half wavelength phase difference at the point of recombination between the energy from one path and that from the other. Consequently, upon recombination at the outer inter- section, the energy from one path substantially cancels the energy from the other, effectively inhibiting energy leakage beyond the region of the door gap.
465883
Company General Electric
Eckersley Raymond A.
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