Artificial magnetic metamaterial design by using spiral resonators

TLDR

A metallic planar particle called spiral resonator (SR) is introduced as a useful artificial atom for designing and fabricating artificial magnetic media. A simple theoretical model is presented and validated by electromagnetic simulation and experiments, providing the key properties and parameters of the SR. SRs enable artificial negative magnetic permeability media and left‑handed media, offering small electrical size, no magnetoelectric coupling, and easy fabrication, with experimental confirmation of NMPM and LHM behavior.

Abstract

A metallic planar particle, that will be called spiral resonator (SR), is introduced as a useful artificial atom for artificial magnetic media design and fabrication. A simple theoretical model which provides the most relevant properties and parameters of the SR is presented. The model is validated by both electromagnetic simulation and experiments. The applications of SR's include artificial negative magnetic permeability media (NMPM) and left-handed-media (LHM) design. The main advantages of SR's for such purpose are small electrical size at resonance, absence of magnetoelectric coupling (thus avoiding bianisotropic effects in the continuous medium made of these particles), and easy fabrication. Experimental confirmation of NMPM and LHM behavior using SR's is also reported.