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US 4,392,039 AGranted
Dielectric heating applicator
AssigneeP.O.R. Microtrans AB
InventorPer O. Risman
Life of this patent
Estimating the term…
Abstract
A dielectric heating applicator has a low-loss dielectric with a dielectric constant exceeding that of the object to be heated by microwaves. An internal resonance is excited in the applicator, which may consist of one or several parts, each containing dielectric, so that a specified field pattern exists at and in the object. Another characteristic is that the part of the object being heated has dimensions which are considerably less than one vacuum wavelength corresponding to the frequency used.
Claims5
A dielectric heating applicator for heating an object, said applicator comprising:
- a hollow cylindrical metal body;
- a mass of low-loss dielectric material, having a dielectric constant .epsilon.'.sub.rd, disposed within and in direct contact with said body;
- coupling means at one side of said body for feeding microwave energy coaxially to said body from a microwave generator;
- and
- means, including the low-loss dielectric material, for forming a resonator at the frequency of the microwave energy fed to said body when an object located at another side of said body is in physical contact with the applicator;
- wherein said dielectric constant .epsilon.'.sub.rd of said dielectric material is greater than the dielectric constant .epsilon.'.sub.rl of said object.
3 more elements
Dependencies are inferred from the claim text.