Triple band regular decagon shaped metamaterial absorber for X-band applications

In this research work, the design characterization of metamaterial absorber has been investigated for X-band applications. For this purpose, a primary regular decagon shaped loop structure has chosen and its multi band response has been studied and analyzed. The simulated results show that absorption peaks occur at 8 GHz, 10 GHz and 12 GHz with absorbance peak response of 96 %, 93.36 % and 91.88 % with full width at half maximum (FWHM) bandwidth of 5.72 %, 4.00 % and 3.80 % respectively. By proper arrangement, we have achieved the absorption peaks for triple frequency band at incident electromagnetic wave. The scalability property of metamaterials was utilized. Field analysis reveals that the frequency selective surface (FSS) unit cell absorbers resonance peaks occur, when the intrinsic impedance of the regular decagon shaped structure matches with the free space impedance. The proposed absorber is predicted to be useful in various potential applications like stealth technology for aircraft, ships, military vehicles, ballistic missiles. Moreover, the design idea has the ability to be extended further to microwave, optical and terahertz regime.