Electromagnetic Scattering by Finite Conducting Circular Cylinders.

The state of the art of electromagnetic scattering by finite cylinders is reviewed. The formal solutions for the total fields for the infinite cylinders are presented. The principles of operation and the actual design of the electromagnetic field probes are discussed. Comparisons between the total fields for all angles around the cylinder as computed from infinite cylinder theory with the normalized results of finite cylinder experiment are presented. Magnetic field measurements give infinite cylinder results for parallel polarization and for perpendicular polarization. Whether or not the ends of the cylinder were capped was found to affect measurements on the cylindrical surface. The length of the slot in a slotted cylinder affected measurements. Measurements of the parallel polarized electric field were made over the slot and parallel to the axis for different slot angles. Scans of the perpendicularly polarized field were made over the aperture. Families of curves with certain regularities result. Some scans of the parallel polarized field were made inside the cylinder and were lower in value than those made on the surface.