Open AccessNew far-field extrapolation method for the computation of electric fields
Author(s) -
Xin Yang
Publication year - 2021
Publication title -
optica applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.204
H-Index - 28
eISSN - 1899-7015
pISSN - 0078-5466
DOI - 10.37190/oa210302
Subject(s) - extrapolation , computation , simple (philosophy) , electric field , domain (mathematical analysis) , field (mathematics) , gauss , scattering , consistency (knowledge bases) , mathematical analysis , mathematics , physics , algorithm , optics , quantum mechanics , geometry , pure mathematics , philosophy , epistemology
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.