This essay is intended to investigate and test the effects of different kinds of smoke on radar wave portion of the electromagnetic spectrum. In regards to the use of electromagnetic waves in the world's current sensors and detectors, the necessity of passive defense and in other words, camouflage against these equipments, is of utmost importance. The use of smoke is one of these ways. Therefore, to perform camouflage, the simulation of a laboratory environment is required which can approximate the smoke camouflage against radar waves as much to the field and operational conditions, as possible. In this essay, a review of the camouflage strength of several material against the radar X- band has been implemented and eventually, taking their reflective coefficient rate into consideration, the carbon fiber as the material which could cause a reduction of 6db in the reflexive coefficient and hence, can be used as a camouflaging material against radar waves.
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