UNCORRELATED ANTENNAS FORMED OF ALIGNED CARBON NANOTUBES

• US 20090160728A1
• Filed: 12/21/2007
• Published: 06/25/2009
• Est. Priority Date: 12/21/2007
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Krenz, Eric, Szini, Istvan, Faraone, Antonio, Emrick, Rudy M.
• Application Number:
  US11/962,891
• Publication Number:
  US 20090160728A1
• Time in Patent Office: Days
• US Class Current: 343/893
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 1/38 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 Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

An uncorrelated RF antenna system (100) having uncorrelated antennas (102, 104) disposed in close relationship for use with mobile communication device transmitters and/or receivers (300). A first antenna (102) comprises a first plurality of elongated nanostructures (106) aligned in a first direction (110), and a second antenna (104) spatially disposed from the first antenna (102) comprises a second plurality of elongated nanostructures (108) aligned in a second direction (112) substantially orthogonal to the first direction (110). When a signal is received, an E polarization is created in the first antenna (102) orthogonal to an E polarization created in the second antenna (104).

Claims

1. An uncorrelated antenna system comprising:

a first antenna comprising a first plurality of elongated nanostructures aligned in a first direction; and

a second antenna spatially disposed from the first antenna and comprising a second plurality of elongated nanostructures aligned in a second direction substantially orthogonal to the first direction.

2. The uncorrelated antenna system of claim 1 wherein each of the first and second antennas comprise sides having a dimension in the range of 0.25 to 0.5 wavelength of the signal.

3. The uncorrelated antenna system of claim 1 wherein each of the first and second antennas comprise first and second antennas for transmitting a signal and are spaced apart within the range of 0.1 to 1.0 wavelength of the signal.

4. The uncorrelated antenna system of claim 1 wherein each of the first and second plurality of elongated nanostructures comprise carbon nanotubes.

5. The uncorrelated antenna system of claim 1 wherein each of the first and second antennas comprise first and second antennas for receiving a signal, wherein orthogonal E polarizations are created in the first and second antennas when the signal is received.

6. The uncorrelated antenna system of claim 1 further comprising:

a digital signal processor; and

a first low noise amplifier coupled between the first antenna and the digital signal processor; and

a second low noise amplifier coupled between the second antenna and the digital signal processor.

7. The uncorrelated antenna system of claim 1 further comprising:

a digital signal processor; and

a first power amplifier coupled between the first antenna and the digital signal processor; and

a second power amplifier coupled between the second antenna and the digital signal processor.

8. The uncorrelated antenna system of claim 1 wherein the first and second antennas are disposed in the same plane.

9. The uncorrelated antenna system of claim 1 wherein the first and second antennas are disposed in parallel planes.

10. A pair of antennas comprising:

a first plurality of nanostructures aligned in a first direction; and

a second plurality of nanostructures spaced from the first plurality of nanostructures and aligned in a second direction orthogonal to the first direction.

11. The pair of antennas of claim 10 wherein each of the first and second plurality of nanostructures comprise carbon nanotubes.

12. The pair of antennas of claim 10 wherein each of the first and second antennas comprise first and second antennas for receiving a signal, wherein, when the signal is received, an E polarization created in the first antenna is orthogonal to an E polarization created in the second antenna.

13. An uncorrelated antenna system comprising:

a first antenna comprising elongated nanostructures; and

a second antenna comprising elongated nanostructures having a correlation coefficient of currents with a magnitude less than 0.7.

14. The pair of antennas of claim 13 wherein each of the first and second antennas comprise sides having a dimension in the range of 0.25 to 0.5 wavelength of the signal.

15. The pair of antennas of claim 13 wherein each of the first and second antennas comprise first and second antennas for transmitting a signal and are spaced apart within the range of 0.1 to 1.0 wavelength of the signal.

16. The pair of antennas of claim 13 wherein each of the first and second plurality of nanostructures comprise carbon nanotubes.

17. The pair of antennas of claim 13 wherein each of the first and second antennas comprise first and second antennas for receiving a signal, wherein, when the signal is received, an E polarization created in the first antenna is orthogonal to an E polarization created in the second antenna.

18. The pair of antennas of claim 13 wherein the first and second antennas are disposed in the same plane.

19. The pair of antennas of claim 13 wherein the first and second antennas are disposed in parallel planes.

20. The uncorrelated antenna system of claim 13 further comprising:

a digital signal processor; and

a first low noise amplifier coupled between the first antenna and the digital signal processor; and

a second low noise amplifier coupled between the second antenna and the digital signal processor.

21. The uncorrelated antenna system of claim 13 further comprising:

a digital signal processor; and

a first power amplifier coupled between the first antenna and the digital signal processor; and

a second power amplifier coupled between the second antenna and the digital signal processor.