Polarization insensitive dual band metamaterial with absorptance for 5G sub-6 GHz applications

Abstract

A couple ring enclosed circular geometric resonator (CRECGR) based dual-band polarization insensitive metamaterial (MM) with high effective medium ratio (EMR), and excellent absorptance is proposed in this study, which can be utilized as a sensor and absorber in the 5G sub-6 GHz frequency range. A circular geometry-based unique patch has been introduced in the proposed unit cell to achieve high polarization insensitive properties with excellent absorption for the 5G sub-6 GHz spectrum. The distinctive feature of this proposed CRECGR unit cell is its simple and unique structure with a high EMR of 11.13, polarization insensitive up to 180°, and epsilon negative (ENG) properties, including a negative refractive index and near-zero permeability for 5G sub-6 GHz applications. Furthermore, this designed unit cell yields excellent absorption properties with high quality factor. The designed MM unit cell is fabricated on low loss Rogers RT5880 printed media with an electrical dimension of 0.089λ × 0.089λ × 0.017λ. The performance of the designed CRECGR metamaterial is determined using Computer Simulation Technology (CST), Advanced Design Software (ADS), and measurements. The CRECGR unit cell offers dual resonances at 3.37 GHz and 5.8 GHz, covering the 5G sub-6 GHz band with ENG, near-zero permeability and negative index. The polarization insensitive properties of the unit cell were also investigated for maximum angle of incidence, which confirmed the identical response. The simulated outcome is verified by experiment with excellent accordance. Moreover, the unit cell performance with a complete backplane is explored, noting a maximum absorption of 99.9% for all normal and oblique incidence waves, suitable for sensing and antenna systems. In addition, the suggested unit cell sensing performance is evaluated using the permittivity-based sensing model. The proposed MM outperforms recent related studies in terms of polarization insensitivity up to 180°, high insensitive absorptivity, high EMR, and sensing applications. These features prove that the proposed CRECGR metamaterial is perfect for 5G Applications.

A Compact Mu-Near-Zero Metamaterial Integrated Wideband High-Gain MIMO Antenna for 5G New Radio Applications

“…An improved retrieval method can be utilized to retrieve the MM’s effective parameters using a scattering matrix [ 44 ]. The following S-parameters, Equations (1) and (2), are used to determine the effective impedance, z , and refractive index, n [ 27 ].…”

“…The metamaterial is a promising technique to improve the MIMO antenna’s performance, particularly in terms of its gain and isolation between the MIMO elements [ 12 , 17 , 23 , 24 ]. It is an artificially engineered, unique material that can modulate electromagnetic (EM) waves, enhancing the antenna performance [ 27 , 28 ]. In [ 9 , 23 ], the authors presented a low-profile two-element MIMO antenna incorporating the metasurface (MS) or parasitic components around the antenna radiators on a single substrate.…”

A novel portable anechoic chamber using ultra-thin 2D microwave absorber for industrial 5.0

“…The narrow-band MAM structure was first introduced by Landy et al in 2008 12 , where two different resonators are proposed for electric and magnetic resonance. After the proposed design, other narrow designs like Salisbury screen 13 , Jauman screen 14 , polarisation insensitive dual band absorber 15 , and Dallenbach screen 16 are proposed. The split maze is proposed to get resonance at different frequencies in X (8-12 GHz) and Ku (12-18 GHz) bands in 17 .…”

A New Technique of FSS-Based Novel Chair-Shaped Compact MIMO Antenna to Enhance the Gain for Sub-6GHz 5G Applications

“…Metamaterials are a type of artificial material that can be designed to have specific electromagnetic (EM) properties. [7], [32], [33]. These properties can be used to improve the performance of MIMO antennas in terms of gain and isolation between MIMO antenna elements [34], [35].…”