A Memory-Efficient Implementation of TLM-Based Adjoint Sensitivity Analysis

Author

Ahmed, Osman S. ; Bakr, Mohamed H. ; Li, Xun

Author_Institution

Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, ON, Canada

Volume

60

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

2122

Lastpage

2125

Abstract

We present a memory efficient algorithm for the estimation of adjoint sensitivities with the 2D transmission line modeling (TLM) method. The algorithm is based on manipulating the local scattering matrices to reduce the required storage for the original structure simulation associated with lossy dielectric discontinuities. Only one value per cell is stored for two dimensional simulations. Moreover, the connection step for the scattered sensitivity storage is embedded during the adjoint simulation and the sensitivity estimates are calculated on the fly. The required memory storage for our implementation is only 10% of the original implementation of AVM sensitivity with TLM.

Keywords

matrix algebra; transmission line theory; 2D transmission line modeling method; AVM sensitivity; TLM-based adjoint sensitivity analysis; adjoint variable method; local scattering matrices; lossy dielectric discontinuities; memory storage; memory-efficient implementation; Dielectrics; Finite difference methods; Memory management; Sensitivity; Time domain analysis; Transmission line matrix methods; Vectors; Computer-aided design (CAD); adjoint variable method (AVM); transmission line modeling (TLM);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2012.2186237

Filename

6142013