Polarization insensitivity characterization of dual-band perfect metamaterial absorber for K band sensing applications

Abstract

Polarization insensitive metamaterial absorbers (MA) are currently very attractive due to their unique absorption properties at different polarization angles. As a result, this type of absorber is widely used in sensing, imaging, energy harvesting, etc. This paper presents the design and characterization of a dual-band polarization-insensitive metamaterial absorber (MA) for K-band applications. The metamaterial absorber consists of two modified split ring resonators with an inner cross conductor to achieve a 90% absorption bandwidth of 400 MHz (21.4–21.8 GHz) and 760 MHz (23.84–24.24 GHz) at transverse electromagnetic (TEM), transverse electric (TE), and transverse magnetic (TM) mode. Polarization insensitivity of different incident angles for TE and TM mode is also investigated, which reveals a similar absorption behavior up to 90°. The metamaterial structure generates single negative (SNG) property at a lower frequency of 21.6 GHz and double negative property (DNG) at an upper frequency of 24.04 GHz. The permittivity and pressure sensor application are investigated for the proposed absorber, which shows its useability in these applications. Finally, a comparison with recent works is also performed to demonstrate the feasibility of the proposed structure for K band application, like sensor, filter, invasive clock, etc.

Wide-Oblique-Incident-Angle Stable Polarization-Insensitive Ultra-Wideband Metamaterial Perfect Absorber for Visible Optical Wavelength Applications

“…Unit cell boundary conditions on the x- and y-axis and open add space on the z-axis were applied for the simulation. The absorption property A ( ω ) was calculated by using Equation (1) [ 8 ]. where S 11 and S 21 are the reflection coefficient and transmission coefficient, respectively.…”

“…Veselago first demonstrated the unusual electromagnetic properties such as negative permittivity or permeability of complex materials [ 1 ], which is known as metamaterials (MMs) [ 2 ]. The characteristics of MMs depend on its physical structure, not its chemical composition, which makes it suitable for use in various applications such as absorbers [ 3 ], filters [ 4 ], antennae [ 5 ], imaging [ 6 ], invisible clocks [ 7 ], sensors [ 8 ], polarization converters [ 9 ], and lenses [ 10 ]. Landy first introduced the metamaterial perfect absorber (MPA) [ 11 ], which has opened a new research area due to its extensive use in different applications such as energy harvesting [ 12 ], solar cells [ 13 ], photodetectors [ 14 ], and thermal emitters.…”

“…The visible wavelength range is 380–750 nm, which corresponds to a frequency spectrum of 400–790 THz. Polarization-insensitive properties are essential for absorber design because of the unique absorption rate at different polarization incident angles [ 8 , 21 ]. Moreover, a broad level of incident angle stability is required for efficient absorption rate [ 22 ].…”

Frequency Integration of Dual-band Hexagonal Metamaterial Resonator antenna for Wi-Fi and 5G Wireless Communication

“…Proposed HMR achieved negative of real and imaginary part for permittivity, permeability, and the refractive index value at 5 GHz frequency band shown in figure 2. All the metamaterial property has been calculated in MATLAB from s-parameters of HMR by using the Nicolson Ross method [4].…”

“…To cover the mm-wave band and Wi-Fi frequency band are important for 5G wireless communication by using a single antenna. Metamaterials are also attractive due to their un-usual property like negative permittivity, permeability, or refractive index, which will provide additional resonance on the antenna [4,5]. Different research work has been done for designing dual-band antenna for sub-6 GHz and mm-wave frequency, among them only a few has frequency reconfigurable property but suffer for larger size, low gain, or lower efficiency.…”