Frequency Response Analysis of Octagonal Complementary Split Ring Resonator-Based Metamaterial

Terahertz (THz) study experienced a remarkable advance in recent years. THz filters are utilized for controlling THz signals in the applications of the THz region. The difficulties in designing THz filters are their higher bandwidth, changeable resonance frequency, low return loss, and low insertion loss. This article examines the frequency response of a metamaterial based on an octagonal complementary split ring resonator (O-CSRR). The proposed O-CSRR is simulated on COMSOL Multiphysics. The results display good performance on filter parameters like resonant frequency range 7.3 THz to 7.8 THz, 1.3 THzof 3-dB, -25.17 dB of return loss(RL), insertion loss(IL) of 0 and transmittance of 100%. The proposed O-CSRR THz filter finds application in THz communication, screening, imaging, etc.