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Efficient analysis of ridged cavity by modal FDTD method
Author(s) -
Yao Bin,
Zheng Qinhong,
Peng Jinhui,
Zhong Runeng,
Xu Wansong,
Xiang Tai
Publication year - 2012
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.1850
Subject(s) - finite difference time domain method , modal , modal analysis , acoustics , materials science , optics , computer science , physics , composite material , vibration
SUMMARY A modal finite‐difference time‐domain (FDTD) method is extended for the analysis of ridged cavities, which are uniform in the z ‐direction. Assuming that the end surfaces of cavity are the perfect conductor, thus, the fields along the z ‐axis can be described by k z . Therefore, three‐dimensional (3‐D) problems can be simulated by the use of a two‐dimensional model. Besides, to achieve a faster computation, the field components are expressed by two pairs of equations—sine and cosine. To validate the utility and efficiency of proposed method, we analyzed two ridged cavities. Numerical results show that less than one‐tenth memory and CPU requirements are needed by the modal FDTD as compared with conventional 3‐D FDTD method. Copyright © 2012 John Wiley & Sons, Ltd.