Electronic device protection

Patent metadata

Field	Value
Publication number	US-8947892-B1
Application number	US-201113303416-A
Country	US
Kind code	B1
Filing date	Nov 23, 2011
Priority date	Aug 16, 2010
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

Apparatus, systems and methods for electronic device protection are provided. A particular apparatus includes a non-conductive substrate and a plurality of cells including conductive members coupled to the non-conductive substrate. The conductive members are arranged to form a first discontinuous mesh. Regions between the conductive members of the first discontinuous mesh include a phase change material. The phase change material undergoes a phase transition from substantially non-conductive to substantially conductive responsive to a change of energy.

First claim

What is claimed is:

1. An apparatus, comprising:
a non-conductive substrate; and
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive, and wherein the first discontinuous mesh permits propagation therethrough of a first electromagnetic waveform having a first wavelength and substantially blocks propagation therethrough of a second electromagnetic waveform having a second wavelength that is different than the first wavelength.

2. The apparatus of claim 1 , wherein dimensions of the plurality of cells are selected to permit propagation of the first electromagnetic waveform and to block propagation of the second electromagnetic waveform.

3. The apparatus of claim 2 , wherein each of the plurality of cells is approximately square and has a length of approximately one-half of the second wavelength.

4. The apparatus of claim 3 , wherein the length is approximately one-twenty-fifth of the first wavelength.

5. The apparatus of claim 1 , wherein a gap is defined between the conductive members of the first discontinuous mesh at the regions between the conductive members and wherein the phase change material includes a gas that forms a plasma when the gas is excited by particular electromagnetic waveforms.

6. A system, comprising:
an electronic device;
a protection apparatus to protect the electronic device by selectively blocking electromagnetic radiation, the protective apparatus comprising:
a non-conductive substrate; and
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive responsive to a first electromagnetic waveform having a first wavelength, and and wherein the first discontinuous mesh permits propagation therethrough of the first electromagnetic waveform and substantially blocks propagation therethrough of a second electromagnetic waveform having a second wavelength that is different than the first wavelength.

7. An apparatus, comprising:
a non-conductive substrate;
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, and wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive; and
a plurality of second cells including second conductive members arranged to form a second discontinuous mesh, wherein the second discontinuous mesh is layered over or under the first discontinuous mesh, wherein the conductive members of the first discontinuous mesh are separated from each other by a first distance and the second conductive members of the second discontinuous mesh are separated from each other by a second distance, and wherein the second distance is different from the first distance.

8. An apparatus, comprising:
a non-conductive substrate; and
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive, and wherein the phase change material includes vanadium (IV) oxide.

9. A system, comprising:
an electronic device;
a protection apparatus to protect the electronic device by selectively blocking electromagnetic radiation, the protective apparatus comprising:
a non-conductive substrate; and
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive responsive to a first electromagnetic waveform, and wherein the phase transition is a metal-insulator phase transition.

10. The system of claim 9 , wherein the electronic device comprises an antenna.

11. A system, comprising:
an electronic device;
a protection apparatus to protect the electronic device by selectively blocking electromagnetic radiation, the protective apparatus comprising:
a non-conductive substrate; and
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive responsive to a first electromagnetic waveform, wherein the electronic device is operable to transmit a signal having a second electromagnetic waveform that is different from the first electromagnetic waveform, and wherein, in a first operational state, the protection apparatus is substantially transparent to the second electromagnetic waveform.

12. The system of claim 11 , wherein the protection apparatus operates in a second operational state when exposed to the first electromagnetic waveform, and wherein, in the second operational state, the protection apparatus is substantially opaque to the first electromagnetic waveform and is substantially opaque to the second electromagnetic waveform.

13. The system of claim 12 , wherein a time required to switch from the first operational state to the second operational state is about 2 nanoseconds or less.

14. The system of claim 13 , wherein the time required to switch from the first operational state to the second operational state is less than one picosecond.

15. An apparatus, comprising:
a non-conductive substrate; and
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material wherein the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive, and wherein the phase transition is a metal-insulator phase transition.

16. A system, comprising:
an electronic device;
a protection apparatus to protect the electronic device by selectively blocking electromagnetic radiation, the protective apparatus comprising:
a non-conductive substrate;
a plurality of cells including conductive members coupled to the non-conductive substrate, wherein the conductive members are arranged to form a first discontinuous mesh, wherein regions between the conductive members of the first discontinuous mesh include a phase change material, and wherein the phase ch

Assignees

• Lam Tai A
• Boeing Co

Inventors

• Lam Tai A

Classifications

• H05K9/0086 Primary

  comprising a single discontinuous metallic layer on an electrically insulating supporting structure, e.g. metal grid, perforated metal foil, film, aggregated flakes, sintering · CPC title

• H01Q15/0013 Primary

  said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective · CPC title

• H01Q15/006

  Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces · CPC title