A Conformal FDTD Method With Accurate Waveport Excitation and S-Parameter Extraction

We demonstrate a conformal finite-difference time domain (CFDTD) technique with accurate waveport excitation and S-parameter extraction. We discuss, under the CFDTD framework, object modeling with effective subcell material, impedance calibration for the conformal modeled coaxial feed, waveport mode calculation with a newly developed conformal 2-D finite-difference frequency domain solver, waveport excitation with a modified total field scattered field method, and a modified S-parameter extraction scheme that is compatible with the CFDTD method. Lastly, we present two specific validation cases intended asWe demonstrate a conformal finite-difference time domain (CFDTD) technique with accurate waveport excitation and S-parameter extraction. We discuss, under the CFDTD framework, object modeling with effective subcell material, impedance calibration for the conformal modeled coaxial feed, waveport mode calculation with a newly developed conformal 2-D finite-difference frequency domain solver, waveport excitation with a modified total field scattered field method, and a modified S-parameter extraction scheme that is compatible with the CFDTD method. Lastly, we present two specific validation cases intended as relevant precursors to the inverse scattering application: modeling of the reflection coefficient of a tapered patch antenna and modeling of the transmission coefficient in a probe-fed rectangular waveguide. relevant precursors to the inverse scattering application: modeling of the reflection coefficient of a tapered patch antenna and modeling of the transmission coefficient in a probe-fed rectangular waveguide.