Polarization Insensitive Metamaterial Absorber With Wide Incident Angle

Abstract

Abstract-This paper presents the design, fabrication and measurement of a polarization insensitive microwave absorber based on metamaterial. The unit cell of the metamaterial consists of four-fold rotational symmetric electric resonator and cross structure printed on each side of a print circuit board to realize both electric and magnetic resonances to achieve efficient absorption of the incident microwave energy. Both the full wave electromagnetic simulation and the measurement on the fabricated absorber demonstrate high microwave absorption up to 97% for different polarized incident electromagnetic waves. To understand the mechanism, analysis is carried out for the electromagnetic field distribution at the resonance frequency which reveals the working mode of the metamaterial absorber. Moreover, it is verified by experiment that the absorption of this kind of metamaterial absorber remains over 90% with wide incident angle ranging from 0 • to 60 • for both transverse electric wave and transverse magnetic wave.

Experimental Measurement Method to Determine the Permittivity of Extra Thin Materials Using Resonant Metamaterials

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Terahertz Metamaterial Modulators Based on Absorption

“…This is different from most other works which focus on the real parts of electric permittivity ε(ω) and magnetic permeability µ(ω) and desire to get low loss. After that, some efforts have been made for metamaterial absorbers, such as polarization-insensitivity, omni-direction (wideangle), and broad band [18][19][20][21][22][23][24].…”

Polarization Angle Independent Perfect Metamaterial Absorbers for Solar Cell Applications in the Microwave, Infrared, and Visible Regime

“…Recent studies show that MTMs provide improvement in light collection for solar cells [5][6][7]. MTMs are artificial structures [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] and they can be specifically constructed for many desired physical properties and applications which cannot be obtained from the conventional materials such as negative refractive index [24], cloaking [25], super lens [26], absorber [27], and so on. Therefore, MTMs have gained a great deal of interest due to their large applicability in the development of efficient devices.…”