This book is aimed at presenting a general computer-oriented method for the analysis of electrically small and medium-sized metallic objects. The objects are assumed to be situated in a lossless homogeneous dielectric medium in an arbitrary incident monochromatic electromagnetic field. The term 'electrically small objects' refers to objects the maximum dimension of which is much smaller than the free-space wavelength, and 'electrically medium-sized objects' to those the maximum dimension of which does not exceed a few wavelengths. The method is not intended for the analysis of electrically large objects, i.e. those the maximum dimension of which is many wavelengths. However, the limitation is due not to the method itself, but rather to the speed and storage capabilities of available digital computers. The principal aim of the analysis is to determine the surface-current distribution on the objects. Once this has been determined with sufficient accuracy, all the quantities of interest, such as the scattered (or radiated) field, the near field, the impedance of generators driving the system etc. can be obtained with relative ease.

Inspec keywords: antenna theory; electromagnetic wave scattering; method of moments; current distribution; electrical engineering computing

Other keywords: computer-oriented method; free-space wavelength; monochromatic electromagnetic field; method of moments; metallic antenna analysis; medium-sized metallic objects; lossless homogeneous dielectric medium; scatterers; electrically medium-sized objects; surface-current distribution; digital computers

Subjects: Antenna theory