Study on Attenuation Performance of Expansible Graphite at 3mm Wave

Based on the theoretical model of the electromagnetic wave attenuation by conductive fibers, the interferential effect of expansible graphite smoke at 3mm wave was calculated and tested in the smoke box and the outdoors. Test results showed that the maximum attenuation effect can exceed 70%, and the expansible graphite was proved to be a possible countermeasure to millimeter wave.