Magneto-inductive cable arrays: Estimation and reduction of crosstalk

Magneto-inductive waveguides are linear periodic structures consisting of regular arrangements of L-C resonators coupled together by mutual inductances M. Magneto-inductive cable is a low-loss flexible variant, based on overlapping inductors and parallel plate capacitors formed by double-sided patterning of copper-clad polyimide. The properties of cable arrays formed from a set of parallel magneto-inductive lines are investigated. Numerical solutions are provided for typical arrangements. Analytic methods are introduced for estimating the coupling between elements in neighboring cables and the frequency dependence of cross-talk. Theoretical confirmation is provided by experimental results for cables operating at ≈100 MHz. Strategies for reducing cross-talk using alternative element designs that achieve low mutual inductance by cancellation of induced currents are explored.