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US 12,217,890 B2Granted
Subwavelength antennas, drivers, and systems
AssigneeVirginia Commonwealth University
InventorSupriyo Bandyopadhyay
Life of this patent
Estimating the term…
Abstract
Embodiments generally relate to subwavelength antennas and, more particularly, extreme subwavelength antennas with high radiation efficiency. One embodiment and its derivatives achieve the objective of an extreme subwavelength dual acoustic and electromagnetic antenna by using spin-orbit torque in an array of nanomagnets.
Claims5
A subwavelength electromagnetic antenna, comprising
- a piezoelectric substrate;
- an array of magnetostrictive nanomagnets in elastic contact with the piezoelectric substrate;
- and
- a driver configured to actuate the array by causing magnetization oscillations in the magnetostrictive nanomagnets using surface acoustic waves (SAWs) launched in the piezoelectric substrate, wherein the driver is configured to change SAW frequencies to cause the array to radiate electromagnetic waves at multiple frequencies that match the SAW frequencies up to a predetermined limit,
- wherein the array of magnetostrictive nanomagnets is configured to (i) convert phonons of the SAWs to magnons via phonon-magnon coupling and (ii) convert the magnons to photons of the electromagnetic waves via magnon-photon coupling.
2 more elements
Dependencies are inferred from the claim text.