A novel stacked magnetic pendulum array (MPA) is proposed as an antenna for efficient transmission in ultralow frequencies (ULF). The MPA structure consists of an array of m Å~ n

magnets stacked in n rows (m magnets of the same magnetization per row) and a solenoid that encompasses the array.

F. Fereidoony, S. P. M. Nagaraja, J. P. D. Santos and Y. E. Wang, "Efficient ULF Transmission Utilizing Stacked Magnetic Pendulum Array," in IEEE Transactions on Antennas and Propagation, vol. 70, no. 1, pp. 585-597, Jan. 2022, doi: 10.1109/TAP.2021.3098596.

It is proposed that ferromagnetic resonance (FMR) of biased, thin film ferrites can be utilized to simultaneously improve the radiation efficiency and input impedance matching of electrically small antennas (ESAs).

W. Gu, K. Luong, Z. Yao, H. Cui and Y. E. Wang, "Ferromagnetic Resonance-Enhanced Electrically Small Antennas," in IEEE Transactions on Antennas and Propagation, vol. 69, no. 12, pp. 8304-8314, Dec. 2021, doi: 10.1109/TAP.2021.3090032.

High sensitivity is often the foremost characteristic for magnetic field sensors; however, the

most sensitive systems tend to be attributed with being any combination of large in size, high in power consumption, complex in design, or exorbitant in cost. Herein we propose a concept for sensor operation that can achieve sensitivities competitive with those of modern magnetic  eld sensors while simultaneously maintaining small size, low power consumption, simplicity in design, and low cost.

K. Q. T. Luong, W. Gu, F. Fereidoony, L. Yeung, Z. Yao and Y. E. Wang, "Radio Frequency Precession Modulation-Based Magnetic Field Sensors," in IEEE Access, vol. 10, pp. 3756-3765, 2022, doi: 10.1109/ACCESS.2021.3140142.

A physics-based nonlinear circuit model is developed for frequency-selective limiters (FSLs) based on thin-film magnetic materials. The equivalent circuit model is structured and its parameters are determined rigorously from the fundamental physics of electromagnetic waves and spin waves.

H. Cui Z. Yao and Y. E. Wang, "Coupling Electromagnetic Waves to Spin Waves: A Physics-Based Nonlinear Circuit Model for Frequency-Selective Limiters," in IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 8, pp. 3221-3229, Aug. 2019.

A rigorous yet computationally efficient 3-D numerical method has been proposed based on modified alternatingdirection- implicit finite-difference time-domain (ADI FDTD) methods.

Z. Yao, R. U. Tok, T. Itoh and Y. E. Wang, "A Multiscale Unconditionally Stable Time-Domain (MUST) Solver Unifying Electrodynamics and Micromagnetics," in IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 6, pp. 2683-2696, June 2018, doi: 10.1109/TMTT.2018.2825373.