Lowering HAMR near-field transducer temperature via inverse electromagnetic design

S Bhargava, E Yablonovitch - IEEE Transactions on magnetics, 2015 - ieeexplore.ieee.org
Heat-assisted magnetic recording (HAMR) allows for data writing in hard disks beyond 1
Tb/in 2 areal density, by temporarily heating the area of a single bit to its Curie temperature …

Microwave Modeling and Design Optimization: The Legacy of John Bandler

JE Rayas-Sánchez, QJ Zhang… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
In this article, we honor Prof. John W. Bandler and his legacy in RF and microwave modeling
and automated design optimization. We showcase his pioneering breakthroughs in minimax …

A quasi-optimal shape design method for electromagnetic scatterers based on NURBS surfaces and filter-enhanced GWO

H Wang, Q Zou, H Lin - IEEE Transactions on Antennas and …, 2023 - ieeexplore.ieee.org
This article presents a quasi-optimal and efficient method for designing the shape of
electromagnetic (EM) scatterers. Optimizing the EM scatterer shape to achieve satisfactory …

Frequency-domain integral equations of scattering for complex scalar responses

AS Beaverstone, DS Shumakov… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
A rigorous frequency-domain forward model of scattering is derived that relates any desired
complex-valued scalar response to the vectors of the electromagnetic field. The model is …

An adjoint variable method for wideband second-order sensitivity analysis through FDTD

Y Zhang, MH Negm, MH Bakr - IEEE Transactions on Antennas …, 2015 - ieeexplore.ieee.org
We propose an efficient adjoint variable method (AVM) for estimating wideband second-
order response sensitivities using the finite-difference time-domain (FDTD) approach. Our …

[HTML][HTML] Shape preserving topology optimization for structural radar cross section control

C Fei, ZHU Jihong, DU Xinxin, R Zhang… - Chinese Journal of …, 2022 - Elsevier
The purpose of this paper is to present a shape preserving topology optimization method to
prevent the adverse effects of the mechanical deformation on the Radar Cross Section …

Shape sensitivity analysis and gradient-based optimization of large structures using MLFMA

J Kataja, S Järvenpää, JI Toivanen… - … on Antennas and …, 2014 - ieeexplore.ieee.org
A fast method for computing the action of shape-differentiated electric field integral equation
(EFIE) system matrix to a vector is derived exploiting the multilevel fast multipole algorithm …

Efficient Adjoint-Based Shape Optimization Method for the Inverse Design of Microwave Components

S Ji, S HuYan, L Du, X Xu, J Zhao - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
An adjoint-based shape optimization approach for the inverse design of microwave
components is proposed. The proposed approach is a pure postprocessing process that …

Electromagnetic optimization of corrugated metallic sheets for maximum power focusing

A Altınoklu, B Karaosmanoğlu… - Journal of Electromagnetic …, 2017 - Taylor & Francis
We present full-wave electromagnetic optimization of corrugated metallic sheets to achieve
maximum power focusing at desired locations when illuminated by plane waves. The …

Microwave Imaging on S-Parameters Using FEM Thin-Wire Subcell Models

L Banting, J LoVetri, I Jeffrey - IEEE Journal of …, 2024 - ieeexplore.ieee.org
A microwave imaging method that directly incorporates S-parameters into its objective
function is presented. S-parameters are extracted from a time-harmonic finite-element model …