Magneto dielectric composite materials and microwave applications thereof
A system for incorporating ferromagnetic materials into several microwave application is described. The system employs a multi-layer substrate. A substrate for receiving microwave signals uses a base layer which has tunable elements and a nanofiber layer which uses magnetic nanotubes. The nanofibers have a high aspect ratio and the nanofiber layer is embedded in the base layer.
1. A substrate for receiving microwave signals comprising:
a base layer having tunable elements; and
a nanofiber layer comprising magnetic nanofibers;
wherein said nanofibers have an aspect ratio of length to diameter of each nanofiber is at least 50 to 1; and wherein said nanofiber layer is embedded in the base layer.
2. The substrate of claim 1 wherein said tunable elements comprise a bilayer structure having a magnetic layer and a piezoelectric layer.
3. The substrate of claim 1 wherein said nanofiber layer comprises nanofibers having an insulating coating.
4. The substrate of claim 3 wherein said insulating coating comprises a sputtered layer of aluminum oxide.
5. The substrate of claim 3 wherein said nanofibers having said insulating coating are arranged in a non-overlapping pattern and said substrate is used in conjunction with an antenna.
6. The substrate of claim 1 wherein nanofibers comprising the nanofiber layer are arranged in a non-overlapping pattern and said substrate is used as an antenna.
7. The substrate of claim 1 wherein said nanofibers are flexible.
8. The substrate of claim 1 wherein said substrate comprises a self-biased magnetic material.
9. The substrate of claim 1 further comprising nanoparticles dispersed within the substrate.
10. The substrate of claim 9 wherein said nanoparticles result in impedance match between the magnetic and electric components.
11. The substrate of claim 1 further comprising nanoparticles dispersed within the base layer.
12. The substrate of claim 11 wherein said nanoparticles result in impedance match between the magnetic and electric components.