Broadband active magnetic materials

An actively-loaded magnetoinductive media was presented and fully investigated analytically. Stability bounds were derived, along with an expression for the effective magnetic permeability. Mutual coupling interactions and periodicity were accounted for, and it was shown that these properties have a critical effect on both stability, as well as the effective material parameters. The bandwidth of negative-μ and μnz materials are significantly increased as compared to passive media. This could have a significant impact on applications in which these classes of materials may be of benefit.