Free-space asymptotic far-field series.
A systematic procedure for deriving the complete asymptotic series in inverse powers of the distance from the origin of free-space 2D and 3D, scalar and vectorial, monochromatic electromagnetic fields is derived here. Each term of the series is expressed in closed form through the use of a differential operator acting on the angular spectrum. A simple recursive routine for computing the derivatives is provided. Examples of application are also given.
Borghi
Riccardo
R
Dipartimento di Elettronica Applicata, Università Roma Tre, I-00146 Rome, Italy. borghi@uniroma3.it
Alonso
Miguel A
MA