Design rules for low-insertion-loss magnonic transducers

TL;DR

This paper introduces a computational framework combining circuit models and micromagnetic simulations for designing magnonic transducers, achieving low insertion loss and high efficiency in RF applications.

Contribution

The paper presents a novel integrated modeling approach for magnonic transducers, enabling optimized design with low insertion loss and improved transduction efficiency.

Findings

Validated model with experimental data showing good agreement.

Identified scaling rules for antenna radiation resistance.

Designed a YIG-based transducer with 5dB insertion loss.

Abstract

We present a computational framework for the design of magnonic transducers, where waveguide antennas generate and pick up spin-wave signals. Our method relies on the combination of circuit-level models with micromagnetic simulations and allows simulation of complex geometries in the magnonic domain. We validated our model with experimental measurements, which showed good agreement witch the predicted scattering parameters of the system. Using our model we identified scaling rules of the antenna radiation resistance and we show strategies to maximize transduction efficiency between the electric and magnetic domains. We designed a transducer pair on YIG with 5dB insertion loss in a 100 MHz band, an unusually low value for micron-scale spin-wave devices. This demonstrates that magnonic devices can be very efficient and competitive in RF applications.