Magnetoelectric nanowire based antennas
Embodiments of the present disclosure integrate magnetoelectric nanowire arrays within antenna assemblies to form ultra-compact antennas. An exemplary nanowire antenna array device comprises a first electrode positioned across a second electrode, wherein an electrode gap separates the first electrode and the second electrode; and a magnetoelectric nanowire connected to the first electrode and the second electrode across the electrode gap without substrate clamping, wherein the nanowire antenna array device receives or transmits electromagnetic waves through the magnetoelectric effect.
1. A nanowire antenna array device comprising:
a first electrode positioned across a second electrode, wherein an electrode gap separates the first electrode and the second electrode;
a magnetoelectric nanowire connected to the first electrode and the second electrode across the electrode gap without substrate clamping;
wherein the magnetoelectric nanowire comprises a piezoelectric material coupled with a magnetostrictive material;
wherein the piezoelectric material coupled with the magnetostrictive material comprises barium titanate coupled with cobalt ferrite; and
wherein the nanowire antenna array device receives or transmits electromagnetic waves through the magnetoelectric effect.
2. The nanowire antenna array device of claim 1 , wherein the nanowire antenna array device operates at a mechanical resonance.
3. The nanowire antenna array device of claim 1 , wherein the nanowire antenna array device comprises a series of magnetoelectric nanowires that span between respective pairs of electrodes, wherein the series of magnetoelectric nanowires include the magnetoelectric nanowire connected to the first electrode and the second electrode.
4. The nanowire antenna array device of claim 1 , wherein the nanowire antenna array device comprises a collection of magnetoelectric nanowires having respective pairs of electrodes that are coupled in parallel with one another, wherein the collection of magnetoelectric nanowires include the magnetoelectric nanowire connected to the first electrode and the second electrode.
5. The nanowire antenna array device of claim 1 , wherein the magnetoelectric nanowire comprises a Janus morphology or a core shell morphology.
6. The nanowire antenna array device of claim 1 , wherein the magnetoelectric nanowire comprises a randomly dispersed morphology or a multistrand morphology.
7. The nanowire antenna array device of claim 1 , wherein the first electrode and the second electrode form inter-digitated electrodes.
8. A wireless communication system comprising a radio transmitter having the nanowire antenna array device of claim 1 .
9. A wireless communication system comprising a radio receiver having the nanowire antenna array device of claim 1 .
10. A nanowire antenna array device comprising:
a first electrode positioned across a second electrode, wherein an electrode gap separates the first electrode and the second electrode;
a magnetoelectric nanowire connected to the first electrode and the second electrode across the electrode gap without substrate clamping;
wherein the magnetoelectric nanowire comprises a piezoelectric material coupled with a magnetostrictive material;
wherein the piezoelectric material coupled with the magnetostrictive material comprises PZT (lead zirconate titanate) coupled with NZF (nickel zinc ferrite); and
wherein the nanowire antenna array device receives or transmits electromagnetic waves through the magnetoelectric effect.
11. A method comprising:
fabricating 1-D magnetoelectric nanofibers;
forming 1-D magnetoelectric nanofibers into shorter 1-D magnetoelectric nanowires;
using a dielectrophoretic force to orient a 1-D magnetoelectric nanowire across an electrode gap separating a pair of electrodes; and
transmitting or receiving electromagnetic waves through a magnetoelectric effect of the 1-D magnetoelectric nanowire.
12. The method of claim 11 , wherein the 1-D magnetoelectric nanowire operates at a mechanical resonance.
13. The method of claim 12 , further comprising:
changing the mechanical resonance frequency by adjusting a width of the electrode gap or a length of the magnetoelectric nanowire.
14. The method of claim 12 , further comprising:
changing the mechanical resonance frequency with a DC magnetic bias field.
15. The method of claim 12 , further comprising:
changing the mechanical resonance frequency by adjusting a diameter of the magnetoelectric nanowire.
16. The method of claim 11 , further comprising:
receiving electromagnetic waves through the magnetoelectric effect of the 1-D magnetoelectric nanowire at its mechanical resonance frequency.
17. The method of claim 11 , wherein the magnetoelectric nanowire is oriented with a solvent across the electrode gap using the dielectrophoretic force.
18. The method of claim 11 , further comprising forming a sacrificial metal coating on the magnetoelectric nanowire.