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FDTD Analysis of Emission from Capacitor with Mechanical Motion
Author(s) -
Shimizu Yuhei,
Hirata Akimasa,
Kuroda Michiko
Publication year - 2013
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.27995
Subject(s) - finite difference time domain method , capacitor , microwave , vibration , variable capacitor , acoustics , amplitude , physics , materials science , voltage , electrical engineering , optics , engineering , quantum mechanics
In this study, we investigate the unwanted emission from a simplified microelectro‐mechanical capacitor with sinusoidal and damped motions. A finite‐difference time‐domain method combined with an adaptive local subcell technique is developed to analyze the field emission from the variable capacitor. First, our computational method is confirmed from the time course of the charge accumulated on the electrode. The unwanted electromagnetic wave is observed to be radiated with its amplitude being sinusoidally modulated at the frequency of the electrode motion. For a realistic motion of the variable capacitor with a damped vibration, the unwanted emission is modulated at frequencies lower than the source frequency. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2821–2824, 2013