Crossed arm-based quad T-shaped metallic arm with a circular loop resonator with wider bandwidth for high-frequency-based wireless communication

A new quad T-shaped triple band metamaterial is presented in this paper containing three resonance frequencies at 5.7 GHz, 9.6 GHz and 12.1 GHz which are covered C, X, and Ku-band, respectively. These three resonance frequencies are observed by high-frequency electromagnetic solver CST (Computer simulation technology) microwave studio at a frequency range of 4–16 GHz with the electric, magnetic and surface current distributions, and the effective parameters are carried out using the robust method from the transmission and reflection coefficient. The junction of four T-shaped conducting layers is introduced wider bandwidth of transmission coefficient from 4.7 to 6.2 GHz, 8.4 to 10.4 GHz, and 11.3 to 13.5 GHz and the symmetric orientation of the split rings exhibits stable responses of EM properties. The proposed metamaterial unit cell has shown a strong accumulation of electric and magnetic field components, where the negative permittivity, negative permeability and negative refractive index are shown at the resonance frequencies of the transmission coefficient. The different angular orientations of the proposed metamaterial with different dielectric constants are analyzed for parametric study.