Coaxial cavity resonator

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I am trying to model a coaxial RF resonator cavity. It consists of hollow outer and inner cylindrical conductors (copper) and are shorted on the two ends by a copper caps. I added impedence boundary conditions to include the losses. I have added Eigenfrequency study. The issue is, when I "compute", I am getting this error: Undefined variable.

  • Variable: comp1.emw.Qfactor

  • Global scope

Failed to evaluate expression.

  • Expression: comp1.emw.Qfactor

  • Feature: Eigenfrequencies (emw)

Can you please explain me what am I missing? Also, apart from this error, how should I proceed with this modeling?


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