Metamaterials, radomes including metamaterials, and methods

Patent metadata

Field	Value
Publication number	US-11811136-B2
Application number	US-202117245488-A
Country	US
Kind code	B2
Filing date	Apr 30, 2021
Priority date	Jun 27, 2017
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

Metamaterials are provided that may include a first substrate including a high temperature dielectric material, and a first array of conductive resonators arranged on the first substrate. The conductive resonators may include a noble metal, a noble metal alloy, a high temperature ceramic semiconductor, or a combination thereof. Radomes including metamaterials also are provided.

First claim

That which is claimed is:

1. A radome comprising:
a metamaterial, wherein the metamaterial comprises (i) a first substrate comprising a high temperature dielectric material; and (ii) a first array of conductive resonators arranged on the first substrate, wherein the conductive resonators comprise a noble metal, a noble metal alloy, a high temperature ceramic semiconductor, or a combination thereof,
wherein the metamaterial is thermally stable at a temperature from 1,400° C. to 1,800° C., and
wherein the radome is a nosecone radome.

2. The radome of claim 1 , wherein the metamaterial further comprises a second substrate comprising the high temperature dielectric material, and a second array of the conductive resonators arranged on the second substrate, wherein the first substrate and the second substrate are arranged substantially parallel to each other.

3. The radome of claim 2 , further comprising an inner wall and an outer wall, wherein the first substrate and the second substrate are arranged between the inner wall and the outer wall.

4. The radome of claim 1 , wherein the radome has substantially zero reflection and near-perfect transparency.

5. The radome of claim 1 , which has multilayered structure that comprises a dielectric slab and a metamaterial slab.

6. The radome of claim 1 , wherein the nosecone radome is suitable for hypersonic flight.

7. The radome of claim 1 , wherein the radome has a pyramidal shape along an ogive curvature acting as a function-tunable waveguide.

8. The radome of claim 1 , wherein the metamaterial is substantially RF transparent.

9. The radome of claim 1 , wherein the high temperature dielectric material comprises alumina (Al 2 O 3 ), yttria (Y 2 O 3 ), silicon nitride (Si 3 N 4 ), or a combination thereof.

10. The radome of claim 1 , wherein the conductive resonators comprise a noble metal and the noble metal comprises ruthenium (Ru), rhodium (Rh), osmium (Os), iridium (Ir), or platinum (Pt).

11. The radome of claim 1 , wherein the conductive resonators comprise a platinum-rhodium alloy.

12. The radome of claim 1 , wherein the conductive resonators comprise a high temperature ceramic semiconductor and the high temperature ceramic semiconductor comprises silicon carbide.

13. The radome of claim 1 , wherein the conductive resonators comprise at least one split ring conductive resonator.

14. The radome of claim 1 , wherein the conductive resonators comprise at least one nanorod conductive resonator.

15. The radome of claim 1 , wherein the conductive resonators comprise (i) at least one “H”-shaped conductive resonator or (ii) at least one metamaterial structure.

16. A radome comprising:
a metamaterial, wherein the metamaterial comprises:
a first substrate comprising a high temperature dielectric material;
a first array of conductive resonators arranged on the first substrate;
a second substrate comprising the high temperature dielectric material;
a second array of the conductive resonators arranged on the second substrate;
wherein the metamaterial is thermally stable at a temperature from 1,400° C. to 1,800° C.,
wherein the first substrate and the second substrate are arranged substantially parallel to each other and wherein the conductive resonators comprise a noble metal, a noble metal alloy, a high temperature ceramic semiconductor, or a combination thereof, and
wherein the radome is a nosecone radome.

17. The radome of claim 16 , wherein the conductive resonators are selected from the group consisting of (i) platinum, (ii) iridium, (iii) a platinum-rhodium alloy, (iv) silicon carbide, or (v) a combination thereof.

18. The radome of claim 16 , wherein the metamaterial is substantially RF transparent.

19. The radome of claim 16 , wherein the conductive resonators are substantially aligned in the Z direction.

Assignees

• Univ Florida State Res Found Inc
• Univ Florida State Res Found

Inventors

• Xu Chengying
• Macdonald Jonathan

Classifications

• H01Q1/422 Primary

  comprising two or more layers of dielectric material (H01Q1/425 takes precedence) · CPC title

• H01Q1/28

  Adaptation for use in or on aircraft, missiles, satellites, or balloons · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q15/0086

  said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials · CPC title

• H01Q15/02

  Refracting or diffracting devices, e.g. lens, prism · CPC title