Abstract
A new tri-band metamaterial unit-cell structure designed and simulated that has multiple octagonal metal rings one inside the other in this paper. The each ring of metamaterial structure delivers a resonance at various frequencies. The number of metal ring resonator has created numbers of resonances. In this paper, different analysis has been performed to verify distinct resonance frequencies, effective medium ratio and effective medium parameters simply by changing the design parameters. Finite-difference time-domain (FDTD) method based Computer Simulation Technology (CST) electromagnetic simulator, which is commercially available is utilized to investigate the design of the metamaterial. The tri-band response has been exhibited of the metamaterial in conjunction with left handed material property over the certain period in the microwave regime. The reported structure has become suitable for S-band (weather radar, radio astronomy, mobile phones, wireless LAN, and GPS), C-band (long distance radio communications), and X-band (satellite communication and space communication) applications and has attained efficient electrically small microwave structure.