Antenna polarization separation to provide signal isolation

• US 20030210194A1
• Filed: 12/02/2002
• Published: 11/13/2003
• Est. Priority Date: 10/19/2000
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Gilmore, Robert P.
• Granted Patent: US 6,980,166 B2
• Time in Patent Office: Days
• US Class Current: 343/725
• CPC Class Codes: H01Q 1/2275 associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• 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

Abstract

A first antenna component has a first polarization. A second antenna component has a second polarization. The second polarization is distinct from the first polarization to provide signal isolation between the first antenna component and the second antenna component. The first antenna component and the second antenna component are coupled in close proximity in a single form factor.

Claims

1. An apparatus comprising:

a first antenna component disposed substantially entirely in a first plane, said first antenna component radiating energy of a first polarization from said first plane; and

a second antenna component disposed substantially entirely in a second plane, said second antenna component radiating energy from said second plane in a second polarization distinct from the first polarization to provide a signal isolation between the first antenna component and the second antenna component, said first antenna component and said second antenna component coupled in close proximity in a single form factor, wherein the signal isolation comprises isolation between a first signal received in the first polarization and a second signal simultaneously transmitted in the second polarization, wherein the first signal and the second signal use a single frequency in common.

2. The apparatus of claim 1 wherein the single form factor comprises one of:

a printed circuit board, an integrated chip, a circuit card, a configuration card, a desk top device chassis, a lap top device chassis, a set top device chassis, and a hand held device chassis.

3. The apparatus of claim 1 wherein the first antenna component and the second antenna component are disposed in a single plane oriented substantially identically to said first plane and to said second plane.

4. The apparatus of claim 3 wherein the first polarization is a linear polarization vertical to the single plane and the second polarization is a linear polarization horizontal to the single plane.

5. The apparatus of claim 1 wherein the first antenna component has an electric field structure and the second antenna component has a magnetic field structure.

6. The apparatus of claim 1 wherein the first antenna component comprises one of a dipole antenna, a monopole antenna, and an inverted F antenna, and the second antenna component comprises one of a loop antenna, a ground-plane-terminated half loop antenna, and a slot antenna.

7. The apparatus of claim 1 wherein the first antenna component is one of etched onto a substrate or etched out of a substrate.

8. The apparatus of claim 1 wherein the first antenna component and the second antenna component comprise a single patch on a substrate, said patch to be driven and/or received from two axes.

9. The apparatus of claim 8 wherein the first antenna component and the second antenna component further comprise at least one parasitic patch adjacent to the single patch on at least one additional layer of the substrate.

10. The apparatus of claim 8 wherein the single patch is one of round, square, and helical.

11. The apparatus of claim 8 wherein a perimeter of the single patch is notched.

12. The apparatus of claim 8 wherein the two axes are coupled to physically independent receivers and/or transmitters.

13. The apparatus of claim 1 wherein one or both of the first antenna component and the second antenna component are meandered.

14. The apparatus of claim 1 wherein the single form factor comprises a housing for the first antenna component and the second antenna component to provide separation from shielding material associated with the single form factor.

15. The apparatus of claim 14 wherein the position of the housing relative to the single form factor is selected from the group consisting of:

a fixed position and an extendable position.

16. The apparatus of claim 14 wherein the housing is flexible.

17. The apparatus of claim 14 wherein the housing comprises:

a planar portion to extend outwardly from the single form factor and to include the first antenna component; and

a vertical portion to extend substantially orthogonal to the planar portion and to include the second antenna component.

18. The apparatus of claim 17 wherein the vertical portion is mechanically coupled to automatically move to a vertical position as the housing is extended from the single form factor.

19. The apparatus of claim 17 wherein the vertical portion is mechanically coupled to automatically move to a planar position as the housing is collapsed into the single form factor.

20. The apparatus of claim 1 wherein the first antenna component and the second antenna component are to remotely couple to at least one transmitter and/or receiver.

21. The apparatus of claim 20 wherein the single form factor comprises a host device and the first antenna component and the second antenna component are to remotely couple to the at least one transmitter and/or receiver installed within the host device.

22. The apparatus of claim 20 wherein the single form factor comprises a component to install in a host device and the first antenna component and the second antenna component are to remotely couple to the at least one transmitter and/or receiver installed elsewhere within the host device.

23. The apparatus of claim 1 wherein the first antenna component and the second antenna component are to couple to at least one transmitter and/or receiver all within the single form factor.

24. The apparatus of claim 1 wherein the first antenna component comprises a loop antenna to substantially encircle the second antenna component, said second antenna component to comprise one of a monopole antenna and a dipole antenna.

25. The apparatus of claim 1 wherein the first antenna component is to couple to a first radio transceiver and the second antenna component is to couple to a second radio transceiver.

26. The apparatus of claim 1 wherein the first antenna component is to couple to a transmitter of a first radio and a transmitter of a second radio, and the second antenna component is to couple to a receiver of the first radio and a receiver of the second radio.

27. The apparatus of claim 1 wherein the first antenna component is to couple to a transmitter of a full duplex radio and the second antenna component is to couple to a receiver of a full duplex radio.

28. The apparatus of claim 1 wherein the first polarization is directionally polarized in a first direction toward the second antenna component and the second polarization is directionally polarized in a second direction toward the first antenna component.

29. An apparatus comprising:

a first antenna component disposed substantially entirely in a first plane, said first antenna component radiating energy of a first polarization from said first plane; and

a second antenna component disposed substantially entirely in a second plane, said second antenna component radiating energy from said second plane in a second polarization distinct from the first polarization to provide a signal isolation between the first antenna component and the second antenna component, said first antenna component and said second antenna component coupled in close proximity in a single form factor, wherein the signal isolation comprises isolation between a first signal transmitted in the first polarization and a second signal simultaneously transmitted in the second polarization, wherein the first signal and the second signal use a single frequency in common.

39. The apparatus of claim 29 wherein the first antenna component and the second antenna component are disposed in a single plane.

30. An apparatus comprising:

a first antenna component disposed substantially entirely in a first plane, said first antenna component radiating energy of a first polarization from said first plane; and

a second antenna component disposed substantially entirely in a second plane, said second antenna component radiating energy from said second plane in a second polarization distinct from the first polarization to provide a signal isolation between the first antenna component and the second antenna component, said first antenna component and said second antenna component coupled in close proximity in a single form factor, wherein the signal isolation comprises isolation between a first signal received in the first polarization and a second signal simultaneously received in the second polarization, wherein the first signal and the second signal use a single frequency in common.

31. The apparatus of claim 30 wherein a combination of a first signal received by the first antenna component and a second signal simultaneously received by the second antenna component provide a combined signal having an improved signal to noise ratio.

40. The apparatus of claim 30 wherein the first antenna component and the second antenna component are disposed in a single plane.

32. An apparatus comprising:

a first antenna component disposed substantially entirely in a first plane, said first antenna component radiating energy of a first polarization from said first plane; and

a second antenna component disposed substantially entirely in a second plane, said second antenna component radiating energy from said second plane in a second polarization distinct from the first polarization to provide a signal isolation between the first antenna component and the second antenna component, said first antenna component and said second antenna component coupled in close proximity in a single form factor, wherein the signal isolation comprises isolation between a signal simultaneously transmitted both in the first polarization and the second polarization of a single frequency.

41. The apparatus of claim 32 wherein the first antenna component and the second antenna component are disposed in a single plane.

33. An apparatus comprising:

a first antenna component disposed substantially entirely in a first plane, said first antenna component radiating energy of a first polarization from said first plane; and

a second antenna component disposed substantially entirely in a second plane, said second antenna component radiating energy from said second plane in a second polarization distinct from the first polarization to provide a signal isolation between the first antenna component and the second antenna component, said first antenna component and said second antenna component coupled in close proximity in a single form factor, wherein the signal isolation comprises isolation between a signal simultaneously received both in the first polarization and the second polarization of a single frequency.

42. The apparatus of claim 33 wherein the first antenna component and the second antenna component are disposed in a single plane.

34. An apparatus comprising:

an antenna patch element disposed in a plane;

a first coupler through which said antenna patch element may be driven along a first axis so as to induce said antenna patch element to radiate energy of a first polarization; and

a second coupler through which said antenna patch element may be driven along a second axis so as to induce said antenna patch element to radiate energy of a second polarization distinct from said first polarization in order to provide signal isolation, said first and second couplers being disposed substantially in said plane.

35. The apparatus of claim 34 further comprising a first transceiver operatively coupled to said first coupler.

36. The apparatus of claim 35 further comprising a second transceiver operatively coupled to said second coupler.

37. The apparatus of claim 34 wherein said first polarization is a linear polarization oriented vertically relative to a plane of said antenna patch element and said second polarization is a linear polarization oriented horizontally relative to said plane of said antenna patch element.

38. The apparatus of claim 34 wherein said antenna patch element is disposed upon a first layer of a substrate, said apparatus further including at least one parasitic patch element adjacent to said antenna patch element on at least one additional layer of said substrate.