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TANMS Graduate Student Wins Best Student Paper Competition at 2017 IEEE International Microwave Symposium

posted Jun 20, 2017, 10:14 AM by Michelle Schwartz   [ updated Jul 20, 2017, 12:36 PM by Tsai-Tsai O-Lee ]

TANMS is proud to recognize TANMS Graduate Student, Zhi (Jackie) Yao, for winning the Best Student Paper Competition at the 2017 IEEE International Microwave Symposium in Hawaii.  Jackie is a fifth year Ph.D. candidate under Professor Ethan Wang in the UCLA Department of Electrical Engineering.  Her research focuses on the development of 3D multiferroic antenna modeling capability that incorporates full interactions between elastodunamics, micromagnetics and electromagnetics. The TANMS 3D antenna modeling is a rigorous yet computationally efficient, and capable of modeling the complex magnetoelastic anisotropies, dispersive, and/or nonlinear behavior accurately. The numerical modeling tool provides guidelines and theoretical support to the multiferroic antenna design which is progressing along well within the center. 

[The following is the title/abstract of the paper that was presented at the 2017 IEEE Conference]

3D Unconditionally Stable FDTD Modeling of Micromagnetics and Electrodynamics

ABSTRACT: A rigorous yet computationally efficient three-dimensional numerical method has been proposed based on modified alternating-direction-implicit (ADI) finite difference time domain methods (FDTD) and it has the capability of modeling the eccentric property of magnetic material being anisotropic, dispersive or nonlinear. The proposed algorithm solves Maxwell’s equations and LLG equations simultaneously, requiring only tridiagonal matrix inversion as in ADI FDTD. The accuracy of the modeling has been validated by the simulated dispersive permeability of a continuous ferrite film with a 1.5 mm-thickness, using a time-step size 104times larger than the Courant limit. The permeability agrees with the theoretical prediction and magneto-static spin wave modes are observed. Moreover, electric current sheet radiators close to perfect electrical conductors loaded with 2 mm-thick ferrite films are simulated, which exhibit a radiation efficiency boost-up due to elimination of platform effect.