Wideband FDTD-Based Adjoint Sensitivity Analysis of Dispersive Electromagnetic Structures

We propose a wideband adjoint variable method for sensitivity analysis of dispersive structures utilizing finite difference time domain (FDTD). Using only one extra FDTD simulation, the sensitivities of the desired response are estimated over the frequency band of interest with respect to all the de...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques Vol. 62; no. 5; pp. 1122 - 1134
Main Authors: Yu Zhang, Ahmed, Osman S., Bakr, Mohamed H.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.05.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Adjoint variable method (AVM)
Adjoints
Applied classical electromagnetism
Applied sciences
computer-aided design (CAD)
Dispersion
Electromagnetic wave propagation, radiowave propagation
Electromagnetism; electron and ion optics
Electronics
Exact sciences and technology
Finite difference method
Finite difference methods
finite difference time domain (FDTD)
Finite difference time domain method
Fundamental areas of phenomenology (including applications)
gradient
Materials
Mathematical analysis
Mathematical model
Mathematical models
metamaterials
Microwaves
Physics
Sensitivity
Sensitivity analysis
terahertz radiation
Time-domain analysis
Vectors
Wideband
Design criterion
Sensitivity analysis
Electromagnetism
Circuit design
gradient
Finite difference time-domain analysis
metamaterials
Numerical method
Adjoint variable method (AVM)
Optimization
THz range
Frequency band
Discretization
Wide band
Simulation
finite difference time domain (FDTD)
computer-aided design (CAD)
terahertz radiation
Maxwell equation
Metamaterial
Computer aided design
Comparative study
Finite difference method
ISSN:0018-9480, 1557-9670
Online Access:Get full text
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Description
Summary:We propose a wideband adjoint variable method for sensitivity analysis of dispersive structures utilizing finite difference time domain (FDTD). Using only one extra FDTD simulation, the sensitivities of the desired response are estimated over the frequency band of interest with respect to all the design parameters. The presented theory is based on direct discretization of Maxwell's equations. We derive the equations of the adjoint system for problems with different types of dispersion profiles including the Lorentz, Drude, and Debye models. The validation of our approaches is done through comparison with the expensive finite-difference approach applied at the response level.
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ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2014.2315779