In this study, unsaturated polyester resin as a substrate, the iron wire wound into a cone spiral, made with unsaturated polyester resins and activated carbon powder which wave absorber made of composite materials. Number of iron coil is fixed at 15 laps, the spacing of 1cm, 1.5cm, 2cm, individually explore the effect of electromagnetic wave absorption,
when the number of turns for 15 laps, the spacing of 1.5cm, the activated carbon powder used as a weight percentage of 15% its maximum absorption value is 29dB. With the Electromagnetic Waves in Unsaturated Polyester Resins and Activated Carbon Powder 29 (2012) 78-83 79 narrowing of the conical spiral wire spacing, so that the electromagnetic waves incident to
the formation of interference resonance between the conical spiral wire, but also increases the electromagnetic wave to hit the chances of the conical spiral wire, and could easily lead to the direct reflection.
