Metallic plates with a two-dimensional (2D) periodic distribution of sub-wavelength apertures are known to exhibit extraordinary transmission of electromagnetic waves. Stacking two or more of such plates gives place to the so-called fishnet structures, which constitute a popular way of achieving an effective negative index medium at frequencies ranging from microwaves to optics. Unfortunately, a general wideband equivalent circuit has not yet been proposed to facilitate its understanding and design. This work presents this circuit model with closed-form expressions for the circuit elements, thus making it possible to obtain the electrical response for this class of structures in a very efficient way. This procedure is much faster than alternative numerical methods at the same time that it retains a high level of accuracy when compared with some other oversimplified models. The circuit model also provides a simple rationale as well as a good physical insight in order to explain the qualitative behavior of such structures, independently of the number of stacked layers.
CITATION STYLE
Torres, V., Mesa, F., Navarro-Cía, M., Rodríguez-Berral, R., Beruete, M., & Medina, F. (2016). Accurate circuit modeling of fishnet structures for negative-index-medium applications. IEEE Transactions on Microwave Theory and Techniques, 64(1), 15–26. https://doi.org/10.1109/TMTT.2015.2504441
Mendeley helps you to discover research relevant for your work.