Near-zone field measurements

The purpose of the work described here was to measure the total fields in all directions in the near zone of metallic and dielectric spheres and cones. Measurements were made by using a small probe mounted on a turntable which was part of an image plane. Experimental accuracy was determined by comparing sphere measurements with the exact Mie theory. [1] The first experimental data on the field inside a dielectric sphere known to the authors are featured.