Magnetic nano-transmitter plasma wave antenna
Assigneehe Government of the United States of America, as represented by the Secretary of the Navy
InventorsWilliam Amatucci, Matthew Finn, Kyle Hrenyo, Alexander Hyde, Dennis Papadopoulos
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for a compact, low-power, single-domain magnetic nanoparticle antenna that improves wave injection efficiency by more than 30 dB over conventional electric or magnetic dipoles, while reducing size, weight and power. This antenna allows in situ investigations to be performed with laboratory-like control to answer fundamental questions regarding nonlinear wave-particle interactions regarding the critical role that Electromagnetic Ion Cyclotron (EMIC) waves play in controlling radiation belt particle flux.
Claims20
A magnetic nanoparticle (MNT) antenna, comprising:
- a cylindrical core comprising a plurality of FeCo magnetic nanoparticles;
- and
- a wire coil wrapped around the cylindrical core.
An antenna, comprising:
- a base comprising an alternating current (AC) circuit;
- a first magnetic nanoparticle (MNT) antenna element coupled to the base, wherein the first MNT element comprises:
- a cylindrical core comprising a plurality of FeCo magnetic nanoparticles, and
- a wire coil wrapped around the cylindrical core, wherein the wire coil is matched to the AC circuit, and wherein the AC circuit is configured to drive the wire coil;
- a second MNT antenna element coupled to the base, wherein the second MNT antenna element is positioned at a 90 degree angle from the first MNT element;
- a third MNT antenna element coupled to the base, wherein the third MNT antenna element is positioned at a 90 degree angle from the second MNT element;
- and
- a fourth MNT antenna element coupled to the base, wherein the fourth MNT antenna element is positioned at a 90 degree angle from the third MNT element and the first MNT element.
A magnetic nanoparticle (MNT) antenna, comprising:
- a cylindrical core having a length to radius ratio of approximately 20, the cylindrical core comprising:
- a plurality of FeCo Single Domain Nanoparticles (SDN), wherein a magnetization of each SDN is a single moment, wherein the single moment is a sum of a plurality of magnetic moments of constituent atoms of each SDN, and wherein a magnetic moment of each SDN has only two orientations antiparallel to each other separated by an energy barrier, and
- a polymer cap covering the SDN, wherein the polymer cap maintains a separation between the SDN such that the SDN act independently;
- a solenoidal wire coil wrapped around the cylindrical core;
- and
- an alternating current (AC) circuit coupled to the wire coil, wherein the AC circuit is matched to the wire coil, and wherein the AC circuit is configured to drive the wire coil.
Dependencies are inferred from the claim text.