How to Model Superconducting Kinetic Inductance

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Model Temperature-Dependent Superconducting Behavior

The simulation requires a superconducting material definition containing its critical temperature, London penetration depth, and normal-state conductivity or sheet resistance. Apply these properties to a superconducting circuit or coplanar waveguide (CPW) resonator and sweep temperature while calculating the resulting kinetic inductance and surface impedance. Circuit simulation provides a fast method for examining how the material model changes resonator behavior over temperature.

Use electromagnetic (EM) simulation when physical geometry and material interactions need to be included in the analysis. Compare resonant behavior across temperature and examine how kinetic inductance changes the resonant frequency and impedance of the superconducting structure. Full EM analysis and Energy Participation Analysis can then incorporate both the material properties and physical layout when evaluating the resonator response.

Superconducting Kinetic Inductance Solution

Define the superconducting material properties, sweep operating temperature, and calculate how kinetic inductance changes the circuit response. Keysight Advanced Design System (ADS) calculates superconducting kinetic inductance and surface impedance from physical material properties rather than requiring manual impedance adjustment. Circuit simulation supports rapid design exploration, while QuantumPro electromagnetic (EM) analysis incorporates the physical geometry for more detailed predictions. Full EM Analysis and Energy Participation Analysis provide additional methods for examining how superconducting material properties and layout affect resonator behavior. The resulting workflow can be used to evaluate temperature-dependent resonant-frequency and impedance changes in superconducting microwave structures.

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