Patent ID: 6614010
Filing Date: 2003-09-02
Classification: B01J,H05B

Abstract:
A heating apparatus comprising:generating means for generating electromagnetic radiation at a wavelength &lgr;, a waveguide for guiding the generated electromagnetic radiation to a waveguide applicator for holding a sample to be heated, the sample having dielectric properties &egr;sample which varies as a function of a temperature of the sample, the waveguide and the waveguide applicator supporting a single transverse mode, a deflector formed by a closed loop defining a plane, said deflector having an inherent resonance frequency &ngr;defl and a thickness of &lgr;/30 to &lgr;/5 in a direction normal to said plane, the deflector being rotatable around an axis being at least substantially parallel to said plane, the deflector being positioned in the waveguide so as to form a resonant cavity with the sample and the waveguide applicator, said cavity having at least one resonance frequency &ngr;cav being dependent upon at least &egr;sample, &ngr;defl, and an angle of rotation of the deflector, &agr;defl.