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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
Promoting Axial Uniformity
in Radio Frequency Heating of Lossy Material in a
Waveguide by Introduction of an Insulating Gap [PDF] |
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AUTHORS |
R. Maslowski,
F. Vermeulin and S. Chute 1992 27 1 33-37 |
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Abstract It is shown that the introduction
of an insulating gap in a parallel phase waveguide filled with lossy material produces an axial electric field in
addition to the transverse electric field already present. When the waveguide is terminated in an open
or short circuit, then the standing wave patterns created by the transverse
and axial fields have interleafing nodes, so that the node of one standing
wave pattern is coincident with the antinode of the
other. This phenomenon leads to radio
frequency heating of the lossy material that is
much more uniform in the axial direction than would be the case if the lossy material were to fill the entire space in the
waveguide. The technique is applied to
show how to heat oil and sand deposits fairly uniformly with radio
frequencies to aid in the recovery of the resource. It is equally applicable in other areas,
for example the radio frequency heating of industrial materials, food stuffs,
and biological tissue. Key
Words: Electromagnetic heating, In-situ heating, Electromagnetic oil recovery |
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