Vol. 51, Issue 3, pp. 321-333

Vol. 51 Issue 3 pp. 321-333

New far-field extrapolation method for the computation of electric fields

Xin Yang


far-field extrapolation, Stratton–Chu formula, Gauss’s law


The extrapolation of the electric field is studied theoretically both in frequency domain and time domain. Combining Gauss’s law with the approximation method in engineering, two new formulas for the scattering field calculation are derived from different logical ideas based on Stratton–Chu formula. The consistency property of the derived formulas is investigated, and the third formula for the scattering field calculation is further obtained. Finally, the time-domain extrapolation is discussed based on the formulas, followed by a simple numerical example. The results obtained are characterized by a simple form and intuitive physical meaning, and are helpful to calculate certain engineering problems.

Vol. 51
Issue 3
Article No: 02
pp. 321-333

0.34 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology