Transient Analysis of a Finite Length Cylindrical Scatterer Very Near a Perfectly Conducting Ground.
AUBURN UNIV ALA ENGINEERING EXPERIMENT STATION
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In attempting to model and predict the magnitude of the surface currents induced on aircraft in the ground-alert mode, it is necessary to examine the effects of the near proximity of the earths surface. For thin cylindrical scatterers sufficiently far removed several wavelengths from the surface, these effects may be taken into account with filamentary currents on the scatterer and its image. However, if the scatterer is moved very near a fraction of a wavelength to the ground, the assumption of filamentary currents is invalidated. In this note a transmission line mode approximation is used to model the circumferential variations of the surface current induced on a finite length cylindrical scatterer very near a perfect ground. This solution is compared to previous solutions based on filamentary currents. The results give clear indications as to when the more sophisticated approach should be used to obtain valid solutions to the scattering problems of this type. Author
- Electricity and Magnetism
- Electromagnetic Pulses