Abstract
Theory for the decomposition of electromagnetic sources with arbitrary time dependence into parts radiating transverse electric (TE) or transverse magnetic (TM) fields with respect to a given constant direction in space is developed. The theory is a generalization of that given earlier by the author (1988) for time-harmonic sources. Three different decomposition methods, which for a point source can be expressed in terms of point sources, line sources, and plane sources, are given. As a check it is demonstrated that for time-harmonic time dependence of the original source, the previously derived decomposition expressions are obtained as special cases.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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