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Calculating frequency‐domain data by time‐domain methods
Author(s) -
Dehler M.,
Dohlus M.,
Weiland T.
Publication year - 1993
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1660060104
Subject(s) - frequency domain , fourier transform , convolution (computer science) , time domain , mathematical analysis , amplitude , mathematics , a priori and a posteriori , harmonic , monochromatic color , field (mathematics) , domain (mathematical analysis) , boundary (topology) , filter (signal processing) , algorithm , computer science , physics , optics , acoustics , philosophy , epistemology , machine learning , artificial neural network , pure mathematics , computer vision
We show the derivation of parameters in the frequency domain from time‐domain data. Far‐field characteristics are obtained by a convolution formula with the harmonic field amplitudes, which are obtained via a Fourier transform or by sampling. The electric field of filter ports is expanded into the discrete eigenmodes. By this method, a monochromatic exact open boundary can be formulated and the fields divided into the incident and the reflected part. For wide band operation an a posteriori error correction scheme is presented.