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Electromagnetic analysis of large structures by using a hybrid early‐time and low‐frequency methodology
Author(s) -
Lee Wonwoo,
Yuan Mengtao,
Sarkar Tapan K.
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22253
Subject(s) - extrapolation , electric field integral equation , method of moments (probability theory) , time domain , frequency domain , integral equation , microwave , singular value decomposition , electromagnetic pulse , time–frequency analysis , mathematical analysis , algorithm , computer science , mathematics , physics , optics , telecommunications , radar , statistics , estimator , computer vision
In this paper, we present an electromagnetic analysis for three‐dimensional arbitrarily shaped large structures illuminated by a short pulse. The time domain electric field integral equation (EFIE) formulation is used to obtain the early time data with a central differencing scheme to evaluate the time derivatives of the potential functions. The solution method is based on the method of moments (MoM) and marching‐on‐in‐time (MOT) technique. Low frequency data is generated using a frequency domain integral equation method. The hybrid method is based on the singular value decomposition (SVD) of the frequency and the time domain data for a direct extrapolation of a causal signal. The detailed mathematical procedures are included along with representative numerical results from an aircraft model. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 898–904, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22253