Microwave oven waveguide with mode transducer and differential m

Details Microwave oven waveguide with mode transducer and differential m Microwave oven waveguide with mode transducer and differential m

1997-02-27

1998-07-28

Leung, Philip H.

Electric heating

Microwave heating

Field modification

219750, 219751, H05B 674

Patent

active

057865795

ABSTRACT:
Disclosed is a wave guide used in a microwave oven, by which superimposed high-frequency microwaves are radiated towards food to be heated, and distorted waves included in the high-frequency microwaves are removed. The wave guide has a housing provided with a magnetron, a mode transducer disposed in the housing so as to superimpose and distribute a high-frequency microwave radiated from the magnetron, and a differential mode absorber for absorbing a distorted wave included in the high-frequency microwave which has been passed through the mode transducer. The mode transducer includes a first hollow-frustuconical member welded to an inner wall of the housing, a second hollow-frustuconical member accommodated in the first hollow-frustuconical member, and a transmission line attached to an inner wall of the second hollow-frustuconical member. Upper and lower support strips for supporting the second hollow-frustuconical member are provided between an inner wall of the first hollow-frustuconical member and an outer wall of the second hollow-frustuconical member. By the wave guide, the heating efficiency is improved and cooking time is shortened. The wave guide ensures the uniform heating of the food.

REFERENCES:
patent: 3127494 (1964-03-01), Kellough et al.
patent: 3764770 (1973-10-01), Saad et al.
patent: 4185181 (1980-01-01), Kaneko et al.
patent: 4496814 (1985-01-01), Fitzmayer
patent: 4839494 (1989-06-01), Vulpe
patent: 4937418 (1990-06-01), Boulard

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