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Electromagnetic field approach to the modeling of disk‐capacitor devices
Author(s) -
Faria J. A. Brandão
Publication year - 2006
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.21733
Subject(s) - capacitive sensing , ground plane , capacitor , electromagnetic field , microwave , electrical engineering , engineering , frequency domain , field (mathematics) , dielectric , electronic engineering , salient , physics , acoustics , computer science , voltage , telecommunications , mathematics , quantum mechanics , antenna (radio) , pure mathematics , computer vision , artificial intelligence
The behavior of a capacitorlike device made of a circular metallic disk on a dielectric substrate over a ground plane is analyzed. A model of the device is derived from energy‐flow considerations based on fundamental electromagnetic equations. Simulation results in both the frequency domain and the time domain are presented and compared with the predictions based on the ordinary quasi‐static model. A salient feature of the device, revealed by the electromagnetic model, is that at very high‐frequency regimes its behavior alternates periodically from capacitive to inductive. Limitations of the model are also discussed. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1467–1472, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21733