Method for coding two-dimensional field emission structures

• US 7,864,009 B2
• Filed: 06/05/2009
• Issued: 01/04/2011
• Est. Priority Date: 04/04/2008
• Status: Expired due to Fees

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Cedar Ridge Research LLC
• Inventors: Fullerton, Larry W., Roberts, Mark D., Richards, James L.
• Primary Examiner(s): Barrera, Ramon M
• Application Number:
  US12/479,505
• Publication Number:
  US 20100045415A1
• Time in Patent Office: 578 Days
• Field of Search: 335/216, 335/285, 335302-306, 310/80, 310/90.5, 310/103, 310/308, 310/309, 243/03
• US Class Current: 335/306
• CPC Class Codes: F02P 3/02 having inductive energy storage, e.g. arrangements of induction coils ignition coils structurally combined with sparking plugs F02P13/00; constructional details of ignition coils H01F38/12
• CPC Class Codes: H01F 2038/127 with magnetic circuit including permanent magnet
• CPC Class Codes: H02K 35/02 with moving magnets and stationary coil systems
• CPC Class Codes: H02K 39/00 Generators specially adapted for producing a desired non-sinusoidal waveform
• CPC Class Codes: Y10T 24/32 having magnetic fastener

Abstract

An improved field emission system and method is provided that involves field emission structures having electric or magnetic field sources. The magnitudes, polarities, and positions of the magnetic or electric field sources are configured to have desirable correlation properties, which may be in accordance with a code. The correlation properties correspond to a desired spatial force function where spatial forces between field emission structures correspond to relative alignment, separation distance, and the spatial force function.

Claims

1. A field emission system, comprising:

a first field emission structure, said first field emission structure comprising a first array of field emission sources having positions and polarities in accordance with a spatial force function, said first array of field emission sources being configured such that only one of said field emission sources is positioned in any one row of said first array of field emission sources and only one of said field emission sources is positioned in any one column of said first array of field emission sources; and

a second field emission structure, said second field emission structure comprising a second array of field emission sources having positions and polarities in accordance with said spatial force function, said second array of field emission sources being configured such that only one of said field emission sources is positioned in any one row of said second array of field emission sources and only one of said field emission sources is positioned in any one column of said second array of field emission sources, said spatial force function corresponding to a code modulo defined by a code, said code modulo having a peak spatial force and a plurality of off peak spatial forces, said plurality of off peak spatial forces having a largest off peak spatial force, said largest off peak spatial force being less than half of the peak spatial force.

2. The system of claim 1, wherein said positions of said first array of field emission sources are in accordance with a first code.

3. The system of claim 2, wherein said first code corresponds to a Costas array.

4. The system of claim 3, wherein said Costas array corresponds to one of a Welch-Costas array or an array generated using the Lempel-Golomb technique.

5. The system of claim 2, wherein said Costas array is flipped vertically.

6. The system of claim 2, wherein said Costas array is flipped horizontally.

7. The system of claim 2, wherein rows and columns of said Costas array are transposed.

8. The system of claim 2, wherein said positions of said second array of field emission sources are in accordance with said first code.

9. The system of claim 2, wherein said polarities of said first array of field emission sources are in accordance with a second code.

10. The system of claim 9, where said second code is one of a Barker code, a Gold code, a Kasami sequence, a hyperbolic congruential code, a quadratic congruential code, a linear congruential code, a pseudorandom code, or a chaotic code.

11. The system of claim 1, wherein said polarities of said first array of field emission sources are the same.

12. The system of claim 1, wherein said polarities of said second array of field emission sources are the same as said polarities of said first array of field emission sources.

13. The system of claim 1, wherein at least some of said polarities of said second array of field emission sources are different than said polarities of said first array of field emission sources.

14. The system of claim 1, wherein said first field emission structure is complementary to said second field emission structure.

15. The system of claim 1, wherein at least one of said first field emission structure or said second field emission structure comprises a permanent magnet, an electromagnet, an electret, a magnetized ferromagnetic material, a portion of a magnetized ferromagnetic material, a soft magnetic material, or a superconductive magnetic material.

16. The system of claim 1, wherein said spatial force function comprises a peak attractive force.

17. The system of claim 1, wherein said spatial force function comprises a peak repellant force.

18. A field emission system, comprising:

a first field emission structure having columns and rows, said first field emission structure having a first plurality of field emission sources positioned such that each row of said first field emission structure includes only one of said first plurality of field emission sources and each column of said first field emission structure includes only one of said first plurality of field emission sources; and

a second field emission structure having columns and rows, said second field emission structure having a second plurality of field emission sources positioned such that each row of said second field emission structure includes only one of said second plurality of field emission sources and each column of said second field emission structure includes only one of said second plurality of field emission sources, said first plurality of field emission sources and second plurality of field emission sources having positions and polarities in accordance with a spatial force function, said spatial force function corresponding to a code modulo defined by a code, said code modulo having a peak spatial force and a plurality of off peak spatial forces, said plurality of off peak spatial forces having a largest off peak spatial force, said largest off peak spatial force being less than half of the peak spatial force.

19. The system of claim 18, wherein said positions of said first plurality of field emission sources and said positions of said second plurality of field emission sources are in accordance with a Costas array.

20. The system of claim 18, wherein said at least one of said polarities of said first plurality of field emission sources and said polarities of said second plurality of field emission sources or said positions of said first plurality of field emission sources and said positions of said second plurality of field emission sources are in accordance with at least one of a Barker code, a Gold code, a Kasami sequence, a hyperbolic congruential code, a quadratic congruential code, a linear congruential code, a pseudorandom code, or a chaotic code.