Modeling and Testing RF Meta-Atom Designs for Rapid Metamaterial Prototyping
MEMS and Nanotechnology
Metamaterials offer custom electromagnetic properties not easily found elsewhere. In this investigation, we look at fabrication methods to reduce time and cost for metamaterials. These designs are compared against analytical modeling, and verified with experimental radio frequency (RF) testing. This paper discusses two models used to represent meta-atoms as lumped circuit elements to establish a resonant frequency. The analytic model is compared with a finite element method (FEM) modeling simulation to determine the capacitance and inductance of the meta-atom and establish a resonant frequency for the comparison. These modeling methods help to determine the resonant frequency before it can be experimentally verified. In this research, we experimentally show the resonant response at 2.57 GHz. In addition, various Metamaterial configurations are tested to capture effects for focusing and blocking electromagnetic waves. The best focusing response occurred at 2.57 GHz with a null of −21 dB with silver inkjet printed meta-atoms supported with FR4 material. The best blocking response occurred at 2.76 GHz with a null of −92 dB with silver inkjet printed meta-atoms supported with FR4 material. The experimental measurements provide characterization for the resonant response, and extraction of electromagnetic material properties which enhances the fundamental understanding for metamaterials.