PERMEABILITY AND PERMITTIVITY MEASUREMENT AND REFLECTIVITY CALCULATION FOR MICROWAVE ABSORBING COMPOSITE MATERIAL CONTAINNING RESONATOR AND ELECTROMAGNETIC LOSSY SUBSTANCE

Yongxue Gan; Fenghong Wang; Pay Yih; C. Q. Chen

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Volume 10 Issue 4

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Abstract

Acta Materiae Compositae Sinica > 1993 > 10(4): 103-108134.

Yongxue Gan, Fenghong Wang, Pay Yih, et al. PERMEABILITY AND PERMITTIVITY MEASUREMENT AND REFLECTIVITY CALCULATION FOR MICROWAVE ABSORBING COMPOSITE MATERIAL CONTAINNING RESONATOR AND ELECTROMAGNETIC LOSSY SUBSTANCE[J]. Acta Materiae Compositae Sinica, 1993, 10(4): 103-108134.

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PERMEABILITY AND PERMITTIVITY MEASUREMENT AND REFLECTIVITY CALCULATION FOR MICROWAVE ABSORBING COMPOSITE MATERIAL CONTAINNING RESONATOR AND ELECTROMAGNETIC LOSSY SUBSTANCE

Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. Chian

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Received Date: October 31, 1991

Abstract

Abstract

A kind of microwave absorbing material consisting of electromagnetic lossy substance,resonator and epoxy resin was prepared.The permeability and permittivitp of the composite were measured by using of an HP8510B microwave vector network analyzer.It has been found that the material works mainly in dielectric loss mechanism.Whereas the magnetic loss is trival in microwave attenuation.An equivalent circuit was used to simulate the composite in electromagnetic field followed by impedance analysis and power reflectivity calculation was carried out in a BASIC program. The tendancy of reflectivity variation with irequeacy determined by calculation is basically in agreement with that revealed by frequency scanning experiment performed with an HP8410C network analyzer.