论文信息 - Design of a Bandwidth-enhanced Ultra Thin Metamaterial Absorber

Design of a Bandwidth-enhanced Ultra Thin Metamaterial Absorber

This paper presents a low-proflle (single layer) circular metamaterial (MTM) mi- crowave absorber structure based on electric fleld driven LC (ELC) resonator. The structure is simulated in HFSS solver giving rise to almost unity absorption (99.92%) at 11.22GHz (X-band). Further a 2£2 array using two difierent variants of the same resonating structure (difierent num- ber of concentric rings) has been studied, which shows two discrete absorption peaks. When these peaks are brought closer by optimizing its dimensions, the structure exhibits a bandwidth of 0.86GHz (11.74{12.60GHz) above 70% absorbance with two absorbance peaks at 12 and 12.5GHz (95% and 93% absorbance respectively) and with minimum absorbance at 12.3GHz (72% absorbance). This proposed bandwidth-enhanced MTM absorber can be used in stealth technology for both X and Ku bands for the application of battlefleld and air borne radar. The proposed structure also shows high (94%) absorbance for angular incidence up to 50 - .

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