Abstract
We present the design of a spin-wave-based microwave signal processing device. The microwave signal is first converted into spin-wave excitations, which propagate in a patterned magnetic thin-film. An interference pattern is formed in the film and its intensity distribution at appropriate read-out locations gives the spectral decomposition of the signal. We use analytic calculations and micromagnetic simulations to verify and to analyze the operation of the device. The results suggest that all performance figures of this magnetoelectric device at room temperature (speed, area, power consumption) may be significantly better than what is achievable in a purely electrical system. We envision that a new class of low-power, high-speed, special-purpose signal processors can be realized by spin-waves.
Highlights
We present the design of a spin-wave-based microwave signal processing device
We present a new class of devices and a new application area for spin-waves
We show that they are very well-suited for high-frequency and extremely compact spectrum analyzer devices
Summary
We present the design of a spin-wave-based microwave signal processing device. The microwave signal is first converted into spin-wave excitations, which propagate in a patterned magnetic thin-film. Even if one assumes relatively long spin wave wavelengths (on the order of several micrometers or more), this will still result in a device that is compact compared to most electrical implementations. Generating spin waves at and by the boundary of the magnetic film has another significant benefit: it enables precise phase-shifting of the waves by patterning the edge.
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