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Focusing in lossy media
Author(s) -
Andersen J. Bach
Publication year - 1984
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/rs019i005p01195
Subject(s) - lossy compression , fast fourier transform , fourier transform , acoustics , focus (optics) , cylinder , optics , modal , physics , near and far field , computer science , materials science , mathematics , algorithm , geometry , artificial intelligence , quantum mechanics , polymer chemistry
The spot size of the focus in a very lossy medium is discussed with relevance to creation of local temperature increase in muscle tissue by means of electromagnetic waves. A slot in a cylinder is used as a source for heating a lossy cylinder and the internal fields are analyzed by a modal method and a fast Fourier transform (FFT) method.