A new procedure for specifying nonradiating current distributions and the fields they produce
نویسندگان
چکیده
This paper reports a new procedure for specifying monochromatic nonradiating ~NR! current distributions ~NR sources! and the electric and magnetic fields they produce ~NR fields!. Vector spherical harmonics and a Fourier–Bessel series are used to derive a new vector spherical-wave expansion for continuous NR fields confined within a spherical volume. The analysis yields complete orthogonal sets in terms of which all such NR fields can be expanded. By making use of a Maxwell operator representation for NR current distributions, we obtain a new series expansion for NR current distributions confined within a spherical volume. The analysis also yields complete sets for such NR current distributions. The developed theory is illustrated with special cases. © 2000 American Institute of Physics. @S0022-2488~00!01202-0#
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