Coupling Electromagnetic Waves to Spin Waves: A Compact Model for Frequency Selective Limiters

被引：1

作者：

Cui, Han ^{[1
]}

Yao, Zhi ^{[1
]}

Wang, Y. Ethan ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA

来源：

2019 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM (IMS) | 2019年

关键词：

Equivalent circuit; frequency selective limiter (FSL); ferromagnetic resonance (FMR); nonlinear model; spin wave; yttrium iron garnet (YIG);

D O I：

10.1109/mwsym.2019.8700730

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A nonlinear circuit model is developed for magnetic material based frequency-selective limiters (FSL). The dominant magnetic-behaviors of FSL devices are translated into equivalent circuits with parameters rigorously determined from fundamental physics. The spin motions as well as the ferromagnetic resonance (FMR) are modeled by RLC parallel circuits with parameters derived from Polder's tensor and Kittel's equations. The exchange coupling between spins is modeled by an inductor added between adjacent RLC circuits based on quantum spin theory. The nonlinear cross-frequency coupling from signal at. to spin waves at omega/2 is represented by a pendulum model that predicts the parametric oscillations of spins. A FSL device described in literature is used as an example to validate the circuit model. The simulation results match the measurement results published, and the model successfully predicts the threshold power level, nonlinear insertion loss, time delay, and frequency selectivity of the device.

引用

页码：591 / 594

页数：4

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