TY - GEN
T1 - Memory efficient adjoint sensitivity analysis exploiting 3D time domain transmission line modeling
AU - Ahmed, Osman S.
AU - Bakr, Mohamed H.
AU - Li, Xun
PY - 2012
Y1 - 2012
N2 - We present a memory efficient implementation of transmission line modeling (TLM)-based adjoint sensitivities. In the original theory, all the transmission line voltage impulses are stored for all the perturbed cells at each time step for both the original and adjoint simulations. This storage can be extensive especially for problems with dielectric discontinuities. We show that only 10% of this storage is required to estimate the adjoint sensitivities with the same accuracy. Our technique exploits a factorization of the scattering matrix that eliminates redundancies in the stored impulses. This technique is illustrated through a three dimensional example that incorporates multiple parameters.
AB - We present a memory efficient implementation of transmission line modeling (TLM)-based adjoint sensitivities. In the original theory, all the transmission line voltage impulses are stored for all the perturbed cells at each time step for both the original and adjoint simulations. This storage can be extensive especially for problems with dielectric discontinuities. We show that only 10% of this storage is required to estimate the adjoint sensitivities with the same accuracy. Our technique exploits a factorization of the scattering matrix that eliminates redundancies in the stored impulses. This technique is illustrated through a three dimensional example that incorporates multiple parameters.
KW - Adjoint variable method
KW - Computer aided design
KW - Time domain techniques
KW - Transmission line modeling
UR - https://www.scopus.com/pages/publications/84866784654
U2 - 10.1109/MWSYM.2012.6259426
DO - 10.1109/MWSYM.2012.6259426
M3 - Conference contribution
AN - SCOPUS:84866784654
SN - 9781467310871
T3 - IEEE MTT-S International Microwave Symposium Digest
BT - IMS 2012 - 2012 IEEE MTT-S International Microwave Symposium
ER -