Umul, Yusuf Z.2016-05-112025-09-182016-05-112025-09-182009Umul, Y.Z. (2009). Improved equivalent source theory. Journal of the Optical Society of America A-Optics Image Science and Vision, 26(8), 1798-1804.1084-75291520-8532https://doi.org/10.1364/JOSAA.26.001798https://hdl.handle.net/20.500.12416/13589Umul, Yusuf/0000-0001-9342-2728The equivalent source theorem, which is an important technique in the study of radiation and scattering by apertures, is improved by using the two axioms of the modified theory of physical optics. The method is applied to the problem of radiation of electromagnetic waves by a parallel plate waveguide. The results are investigated numerically. (C) 2009 Optical Society of Americaeninfo:eu-repo/semantics/closedAccessArticle10.1364/JOSAA.26.0017982-s2.0-85010124478