Investigation of X Frequency Microwave Absorbance of Ferrite Nano-Composite in Polyurethane Matrix

In modern battlefield, Radar has emerged as an important sensor to detect and target the military equipment of enemy. The camouflage against radar sensor is mainly achieved through the use of radar absorbing materials (RAM). These materials absorb most of the radar incident energy, thereby reducing the reflected signal to minima, and thus locking the capability of radar detection. In this study, the ability of different nanocomposites were examined to measure the reflection loss. Polyaniline, iron oxide and titanium oxide nanocomposite on Polyurethane substrate was successfully tested and absorbed good amount of radar waves. In order to optimize the reflected loss (the amount of absorbance), the effect of parameters such as thickness and concentration of nanocomposite were considered. The results indicated that the maximum loss in range of 8-12 GHz for a thickness of nanocomposite as 7.5 mm, is about 22.5 dB at 9.7 GHz .