▎ 摘　　要

In this work an efficient circuit model of functional thin-film graphene assisted meta material (GM) devices with exploiting transmission line theory (TLT) is presented. In our proposed model, graphene sheet layer considered as parallel R-L-C circuits and the other parts of the devices modeled as circuit elements. Here we develop the structure and design multi-layer unpattern GM absorber. To evaluate robustness, performance and accuracy of our developed TLT method, the results obtained from an easy to implement MATLAB code for a GM absorber have been compared with those obtained from full-wave simulations and analytical approach. Our proposed method in addition to reducing the calculation time and the need for less memory compared to full-wave simulations, is in good agreement with the full-wave and analytical simulations (with an error less than 3%). By changing chemical potential and/or dielectric thickness of the GM absorber, the absorption peek's frequency could be tuned in terahertz band as desired, indicating the potential applications of the absorber in sensors and filters. (C) 2018 Elsevier GmbH. All rights reserved.