Dual-Band Polarization Independent Metamaterial Absorber Based on Omega Resoanator and Octa-Star Strip Configuration

Abstract

Abstract-Dual-band metamaterial absorber (MA) with polarization independency based on omega (Ω) resonator with gap and octastar strip (OSS) configuration is presented both numerically and experimentally. The suggested MA has a simple configuration which introduces flexibility to adjust its metamaterial (MTM) properties and easily re-scale the structure for other frequencies. In addition, the dualband character of the absorber provides additional degree of freedom to control the absorption band(s). Two maxima in the absorption are experimentally obtained around 99% at 4.0 GHz for the first band and 79% at 5.6 GHz for the second band which are in good agreement with the numerical simulations (99% and 84%, respectively). Besides, numerical simulations validate that the MA could achieve very high absorption at wide angles of incidence for both transverse electric (T E) and transverse magnetic (T M ) waves. The proposed MA and its variations enable myriad potential applications in medical technologies, sensors, modulators, wireless communication, and so on.

A Novel Six-Band Polarization-Insensitive Metamaterial Absorber With Four Multiple-Mode Resonators

“…However, in the early stage, most of the metamaterial absorbers (MMAs) are single-band [6,7] or polarization-sensitive [8,9]. To achieve different features, such as multiband and polarization-insensitive [10][11][12][13][14][15][16][17][18], many efforts are put to develop the MMAs, and a variety of design methods have been reported in the past few years. For a multi-band absorber, the reported design methods can be mainly classified into three types.…”

Design and Characterization of a Dual-Band Metamaterial Absorber Based on Destructive Interferences

“…This agreement validates the robustness of using interference theory to reveal the performance of proposed MA based on the destructive and constructive interferences at interfaces. This explanation does not involve any near-field interaction or magnetic resonance [8][9][10][11] between the two metal layers in the proposed MA.…”

“…The two absorptions are at C band. The physics of MAs has been explained by different mechanisms [8][9][10][11]. We use a numerical way to explore the absorption mechanism in this absorber structure and verify that the high absorption originates from the destructive interference of the reflection waves, but not the intrinsic electromagnetic resonance loss of the structure [12].…”

Genetic Algorithm Optimized X-Band Absorber Using Metamaterials

“…They have myriad applications [2][3][4], and one of them is the design of Xband absorbers or radar absorbing material [5,6]. Several X-band absorbers have been proposed in the literature [7][8][9][10][11][12][13][14][15][16] that can be broadly classified into two categories: polarization dependent absorbers [7,8] and polarization independent absorbers [9][10][11][12][13][14][15][16]. The polarization independent absorbers are generally symmetrical structures and are insensitive to polarization states with a narrow absorption bandwidth [13].…”