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Fast and accurate frequency‐sweep calculations using asymptotic waveform evaluation and the combined‐field integral equation
Author(s) -
Jiao Dan,
Zhu XianYang,
Jin JianMing
Publication year - 1999
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/1999rs900068
Subject(s) - waveform , integral equation , sweep frequency response analysis , electric field integral equation , mathematics , field (mathematics) , mathematical analysis , scattering , electromagnetic field , acoustics , physics , optics , quantum mechanics , voltage , pure mathematics
The method of asymptotic waveform evaluation (AWE) is applied to the combined‐field integral equation (CFIE) to achieve fast and accurate frequency‐sweep calculations of electromagnetic scattering and radiation by three‐dimensional conducting and dielectric objects. The employment of the CFIE eliminates the interior resonance problem suffered by both the electric‐field integral equation and the magnetic‐field integral equation. It is shown that the use of AWE can speed up the calculation by more than an order of magnitude. It is also shown that when combined with the complex frequency hopping technique, the AWE method can produce an accurate solution within a prespecified frequency band. Numerical examples are presented to demonstrate the performance of the proposed method.