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Preparation (Soft Polyurethane Foam/Graphite) Composites For Microwave Absorption In X-Band Frequency | ||
| Journal of College of Education for Pure Science | ||
| Article 1, Volume 2, Issue 2, 2012, Pages 89-98 | ||
| Authors | ||
| Zeki A. Ahmed; Raad A. Abdulnabi; Dahlia K. Gatee | ||
| Abstract | ||
| The aim of this study is to produce sheets of microwave absorbing materials using Graphite in different concentrations (5wt.% - 40wt.%) and dispersed in a Soft Polyurethane Foam matrix. The study also aims to measure the electromagnetic properties (transmission, return loss and relative absorbed power) of these sheets in the x-band frequency range (8.5–12.4) GHz using closed waveguide technique .It is found that the lower value of Return Loss is (-30dB) in less than (5wt.%) graphite loading, and the relative absorbed power are close to (5%) of the incident radiation in all frequencies. The higher value of the return loss is (-18dB) in (30wt.%) Graphite loading, and the relative absorbed power value is close to (25%) of the incident radiation in 10GHz. These composites are very useful in producing the EMI Shielding, absorbing sheets and microwave anechoic chambers. | ||
| Keywords | ||
| Polyurethane Composites; return loss; microwave anechoic chambers | ||
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