High frequency heating device having an energy feed system inclu

Details High frequency heating device having an energy feed system inclu High frequency heating device having an energy feed system inclu

1986-12-15

1988-03-22

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055A, H04B 672

Patent

active

047330376

ABSTRACT:
A high frequency heating device includes a high frequency oscillator, a heating chamber for accommodating an object to be heated, and a cylindrical wave guide for coupling the high frequency oscillator to the heating chamber. The output antenna for the high frequency oscillator is disposed at an input end portion of the cylindrical wave guide and along the center axis of the wave guide. The heating chamber has a wall which is coupled to the cylindrical wave guide, the wall being positioned in an end plane of the cylindrical wave guide opposite to the output antenna. An arcuate slit is formed in the wall with the center of curvature of the slit being centered at the center axis of the cylindrical wave guide. This construction suppresses higher harmonics, and furthermore impedance matching and adjustment of the heating performance are facilitated.

REFERENCES:
patent: 3789179 (1974-01-01), Haagensen
patent: 4185181 (1980-01-01), Kaneko et al.
patent: 4424430 (1984-01-01), Almgren et al.
patent: 4463239 (1984-07-01), Miller
patent: 4496814 (1985-01-01), Fitzmayer

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