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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
Characterization of a Single Mode Applicator [PDF] |
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AUTHORS |
S.K. Pathak, F. Liu and J. Tang 2003 38 1 37-48 |
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Abstract Microwave
heating plays an important role in the processing & heating of foods in
the food industry and in home, but the applicator design is frequently an
arduous task. The finite-difference time-domain (FDTD) method can be used to
model complex geometries and guide the design of different types of
applicators. In the reported research, the FDTD approach has been employed to
characterize the electric field distribution of a rectangular waveguide
applicator, carrying TE10-mode aperture field distribution,
terminated in an oversize rectangular waveguide/ cavity and operating at 915
MHz. A comprehensive study was carried out to evaluate the mode/field
distribution in the empty cavity box as a function of its geometrical
dimensions. Power deposition profile
throughout the volume of a packaged food, and scattering parameters as a
function of food properties and surrounding environment were computed, by
using a realistic food-engineering model. Good agreements between modeling
results and experimental results were obtained. The results demonstrated the
usefulness of numerical simulation in predicting and characterizing the
electromagnetic (EM) field distributions from microwave applicators used in
food processing. |
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