Computation of the Field Distribution Generated by a Rectangular Aperture in a Four-Layered Lossy Dielectric Medium by Modal Analysis
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概要
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An open-ended rectangular waveguide filled with a dielectric has been used as a contact-type antenna of microwave radiometer for non-invasive measurement of temperature in a biological object. In this application, the thermal radiation emitted by the object is measured as the brightness temperature by the instrument via the antenna. The brightness temperature is related to the physical temperatures in the object through the radiometric weighting function. By virtue of the reciprocity of antenna, the weighting function can be derived from the field distribution induced in the object by the antenna when it is operated in the active mode. In this work, we treat a problem of the rectangular waveguide antenna radiating into a four-layered medium by modal analysis. The results are first compared with those obtained by the FD-TD method to indicate that the results of the two methods are in a good agreement. The operation of an antenna used in a radiometer system in our laboratory is analyzed by this method and the weighting functions at different frequencies are computed, and the results are presented along with discussions on the results.
- 社団法人電子情報通信学会の論文
- 1995-06-25
著者
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Abe K
Research Institute Of Electronics Shizuoka University
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Sugiura Toshifumi
Research Institute of Electronics, Shizuoka University
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Abe Katsumi
Research Institute of Electronics, Shizuoka University
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Mizoshiri Shinya
Research Institute of Electronics, Shizuoka University
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Mizushina Shizuo
Research Institute of Electronics, Shizuoka University
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Mizushina S
Research Institute Of Electronics Shizuoka University
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Mizushina Shizuo
Research Institute Of Electronics Shizuoka University
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Sugiura T
Research Institute Of Electronics Shizuoka University
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Sugiura T
Shizuoka Univ. Shizuoka‐shi Jpn
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Sugiura Toshifumi
Research Institute Of Electronics Shizuoka University
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Sugiura T
Shizuoka University
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