Design of Polarization and Incident Angle Insensitive Dual-Band Metamaterial Absorber Based on Isotropic Resonators

Abstract

Abstract-Polarization and incident angle independent metamaterial-based absorber (MA) which acts as a strong dual-band resonator is designed and constructed. Besides, a method to design single/dualband MA is presented in detail. The proposed model is based on isotropic ring resonator with gaps and octa-star strip (OSS) which allows maximization in the absorption because of the characteristic features of the structure. Reflection and absorption responses are obtained both numerically and experimentally and compared to each other. Two maxima in the absorption are experimentally obtained around 90% at 4.42 GHz for the first band and 99.7% at 5.62 GHz for the second band which are in good agreement with the numerical simulations (95.6% and 99.9%, respectively). The numerical studies verify that the dual-band MA can provide perfect absorption at wide angles of incidence for both transverse electric (T E) and transverse magnetic (T M ) waves. The proposed model can easily be used in many potential application areas such as security systems, sensors, medical imaging technology.

Dual-Band Polarization-Insensitive Metamaterial Inspired Microwave Absorber for Lte-Band Applications

“…MMAs are developed and studied for potential applications like sensors, radar cross section (RCS) reduction, medical imaging, spectroscopic detector and solar cell applications, to name a few. As a result of these magnificent properties, the MMAs are explored from single-band [14,15], dual-band [16][17][18], tripleband [19][20][21][22], quad-band [23,24] in the form of multi-band [25][26][27] up to narrow band [28,29] and broad band [30,31] with frequency ranging from microwaves [29,30] to terahertz [32]. Any EM absorber performance is determined by how efficiently it absorbs the input EM signals.…”

An Novel Absorber Screen Design Method Based on Receiving Antenna Principle

“…MMs have many types in practice, such as high impedance surface (HIS) [5], artificial magnetic conductor (AMC) [6], electromagnetic band-gap (EBG) [7] and left-handed metamaterial (LHM) [8]. However, most of these papers utilize MMs' high-impedance characteristic, and the bandwidths in these papers are still narrow for their resonance bandwidths [9][10][11]. To achieve broadband absorber screen, the active devices such as pin diodes are inserted in the metal patches joint of the periodic unit [12], which can be varied with an applied electrical or optical control signal to realize active or adaptive performance.…”

Ultra-Compact Metamaterial Absorber With Low-Permittivity Dielectric Substrate

“…These metamaterial absorbers can operate at almost arbitrary frequency spectra ranged from radio frequencies, microwave and terahertz frequencies, to even optical frequencies [8][9][10][11][12][13]. Moreover, strategies for expanding the operating bandwidths of MAs, such as dual-band [14,15], triple-band [16,17], multiband [18,19], band-tunable [20,21], broad-band [22,23], and ultra-broad-band [24,25] designs, have also been reported in recent years. Simultaneously, the theoretical analysis methods including classic electromagnetic theory [7], interference theory [26], and equivalent circuit/transmission line theory [27] are developed to analyze and guide the design procedures and explain the appeared exciting absorbing properties.…”