Analytical study on variation of temperature and absorption characteristics of single-layer radiowave absorber by irradiation electric power

In this study, the relative complex permittivity of an epoxy resinous material is measured under changes in temperature. The temperature distribution of a single‐layer radiowave absorber is analyzed using the FDTD‐HTE method with measured relative complex permittivity, and then the irradiation elect...

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Bibliographic Details
Published in:Microwave and optical technology letters 2004-04, Vol.41 (1), p.3-5
Main Authors: Kato, Masanori, Suga, Ryosuke, Hashimoto, Osamu, Nakamura, Takayuki, Wada, Kouji
Format: Article
Language:English
Subjects:
absorption characteristics
cavity resonator
FDTD-HTE method
measurement of complex permittivity
radiowave absorber
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Summary:In this study, the relative complex permittivity of an epoxy resinous material is measured under changes in temperature. The temperature distribution of a single‐layer radiowave absorber is analyzed using the FDTD‐HTE method with measured relative complex permittivity, and then the irradiation electric power's temperature change inside the absorber is calculated. As a result, it is observed that the temperature inside the absorber increases rapidly, so that the irradiation electric power is high, and that the temperature of the absorber increases to 170°C after the irradiation during 120 min under the irradiation electric power with 1000 W/m2. It is found that the absorption characteristics of the absorber vary rapidly when they are calculated using the abovementioned analytical result. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 3–5, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20027
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.20027