A Tunable Dual-Band Metamaterial Filter Based on the Coupling Between Two Crossed SRRs

Abstract

A tunable dual-band metamaterial filter based on crossed split-ring resonators is numerically and experimentally demonstrated. The proposed tunable metamaterial filter consists of two same metal split rings with different angles. Based on the cross-coupling between these two split rings, two stopbands are generated. Moreover, the operating frequency of the two stopbands can be tuned by changing the angle between the two split rings. In the context of numerical results, surface current distributions and electric field distributions were employed to analyze the basic principle, and the experiments were performed to demonstrate the practical effect. All results verified the tunable characteristics of the proposed metamaterial filter. This design proposes a new tunable metamaterial filter through the angle rotation.

Symmetric resonator based tunable epsilon negative near zero index metamaterial with high effective medium ratio for multiband wireless applications

“…On the other hand, in 53 , mercury inspired split ring resonator is described that exhibits magnetic resonance depending on temperature variation. Moreover, a tunable metamaterial filter is presented in 54 that uses two cross coupled split rings. Two stopband frequencies are tuned by changing the angle between these two rings.…”

“…Resonance frequency shifts to low frequency with increasing temperature 2. Linear shift noticed within 0–30 °C 54 Tunability based on coupling between two crossed split ring resonators arranged in different rotation angles 2.5 GHz C-band 1. Dual band resonances within 5.5–8 GHz 2.…”

Optimization of metamaterials and metamaterial-microcavity based on deep neural networks

“…Several metamaterial structures such as split-ring resonators, negative refractive index fishnet arrangements, letter-shaped structures, and common geometric structures with symmetry and asymmetry [15][16][17][18] have been presented in the past two decades and most of them are important designs for different applications. Among them, the split-ring structure has been extensively used and will continue to be used because it can support narrow Fano resonance, magnetic response, and a large degree of control over the resonant properties for both xand ypolarizations [19][20][21][22][23][24][25][26][27][28][29] . Optical properties of single-layer metamaterial such as reflectance, transmittance and absorptance are generally the function of wavelength only when the structure and material of metamaterial are fixed.…”

“…Among them, the split-ring structure has been extensively used and will continue to be used because it can support narrow Fano resonance, trappedmode magnetic resonances, and, quasi-bound states in the continuum (BIC). [19][20][21][22][23][24][25][26][27][28][29] Optical properties of single-layer metamaterials such as reectance, transmittance and absorptance are generally a function of wavelength only when the structure and material of the metamaterial are xed. If we want to provide functionalities on demand for exible applications of metamaterials, temporal or space modulation of metamaterial-based devices is needed.…”

Optimization of Structural Parameters of PCF Polarization Filter by a Genetic Algorithm

“…Furthermore, the proposed filter can be efficiently implemented at any wavelength of the optical communication window by optimizing the structural parameters. In 2021, Qiao [4] et al proposed a tunable dual-band metamaterial filter composed of two identical metal split rings with different angles. The operating frequency variation range can reach 2.5 GHz with the rotation angle varying from 30°-90°.…”