A Simplified Lossless Analysis of Magnetoinductive Waveguides for Investigation of Impedance Termination on Power Nulling Characteristics

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Apisak Worapishet


This work develops a simplified analysis of magnetoinductive (MI) waveguides under lossless and single load conditions. The formulation makes use of the relationship between the incident, reflected, and transmitted MI waves (MIWs) to enable explicit closed-form expressions of the current MIWs along the waveguide. By virtue of the analysis, investigation on
the effect of the impedance termination on the power transfer characteristic of the MI waveguide is carried out, particularly under open, short and quadrature reactive impedance conditions. It is shown that although the quadrature impedance yields no current nulling at the center of each resonator cell, power transfer nulls still persist when the receiver is placed between cells that exhibit out-of-phase currents.

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