Microwave electromagnetic and absorption of Yttrium Iron Garnet (YIG) - Thermoplastic Natural Rubber (TPNR) composites
2003
Mansor A. A. | Abdullah M. H. | Ahmad S. H. | Hamid S. A. A. | Yusoff A. N. | Yusop M. | Jusoh S. F.
Ytrium iron garnet (YIG) - thermoplastic natural rubber (TPNR) magnetic composites with 10 - 30 weight percent of YIG filler were prepared via a Brabender plasticorder internal mixer. Their microwave electromagnetic properties and absorption characteristics at room temperature (299 K) were studied in the range of 0.3 to 13.5 GHz using a microwave vector network analyzer (MVNA). The real and imaginary components of the relative complex dieletric permittivity (epsilon subscript r* = epsilon subscript r` - j epsilon subscript r") and magnetic permeability (mu subscript r* = mu subscript r` - jmu subscript r") were computed from the reflection and transmission complex scattering parameters (S11* and S21*) using the Nicolson-Ross and Precision models. The result shows that the reflection coefficient strongly depends on the thickness and the electromagnetic properties of the samples.
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