Simulation design of triple band metamaterial absorber for radar cross section reduction

The existence a problem of military vehicles at ship susceptible to noise propagation caused by a vibration of machine inside engine room. To solve interference problem that, it can be used by Radar Absorbing Material (RAM) such as metamaterial absorber in engine control room, so in this research will be proposed the design and simulation of metamaterial absorber at frequency in triple band that implemented at engine control room as reducer machine ship so it happen not interference to outside engine ship. Design of the metamaterial absorber will done with determine dimension and shape of metamaterial absorber and it will simulated with CST Microwave Studio 2012 software. The result of simulation at triple band metamaterial absorber brings S11 at frequency 2.079 GHz is -12.041 dB, so resulting the value of absorption is 99.6 %. For S11 at frequency of 2.895 GHz is -9.869 dB, so resulting the value of absorption is 98.93 % and frequency of 3.894 GHz is -15.544 dB, so resulting the value of absorption is 99.92 %. It show that the absorber has a good absorbing performance (absorption > 80 %) from three peaks frequency.