Capacitively-coupled isolator assembly

1. Apparatus comprising:

a capacitively-coupled isolator assembly positioned between at least two antennas, the capacitively-coupled isolator assembly providing isolation between the at least two antennas and further including:

a grounded conductive element electrically connected to a ground plane electrically connected to the at least two antennas; and

an electrically-floating conductive coupling element capacitively coupled to the grounded conductive element.

2. The apparatus of claim 1 , wherein the electrically-floating conductive coupling element is surrounded by an insulating material.

3. The apparatus of claim 2 , wherein the grounded conductive element has a first long side and a second long side and the electrically-floating conductive coupling element is capacitively-coupled to both long sides of the grounded conductive element.

4. The apparatus of claim 3 , the electrically-floating conductive coupling element extends along both long sides of the grounded conductive element.

5. The apparatus of claim 1 , wherein the electrically-floating conductive coupling element has a length of ¼ of a wavelength of a carrier wave signal radiated by the at least two antennas.

6. The apparatus of claim 1 , wherein the electrically-floating conductive coupling element has a length of ½ of a wavelength of a carrier wave signal radiated by the at least two antennas.

7. The apparatus of claim 1 , wherein the isolator assembly includes one or more tunable capacitors to adaptively tune a mode of resonance of the isolator assembly.

8. The apparatus of claim 1 , wherein the electrically-floating conductive coupling element is a first electrically-floating conductive coupling element, the apparatus further comprising:

a second electrically-floating conductive coupling element capacitively coupled to the grounded conductive element, the second electrically-floating conductive coupling element having a different end-to-end length than the first electrically-floating conductive coupling element.

9. The apparatus of claim 1 , wherein the electrically-floating conductive coupling element is a first electrically-floating conductive coupling element and further comprising:

a second electrically-floating conductive coupling element capacitively coupled to the grounded conductive element, the first electrically-floating conductive coupling element being routed between the grounded conductive element and the second electrically-floating conductive coupling element.

10. A method comprising:

positioning a capacitively-coupled isolator assembly between at least two antennas, the capacitively-coupled isolator assembly providing isolation between the at least two antennas electrically connected to a ground plane, wherein the capacitively-coupled isolator assembly includes a grounded conductive element electrically connected to the ground plane and an electrically-floating conductive coupling element capacitively coupled to the grounded conductive element.

11. The method of claim 10 wherein the electrically-floating conductive coupling element is surrounded by an insulating material.

12. The method of claim 11 , wherein the grounded conductive element has a first long side and a second long side and the electrically-floating conductive coupling element is capacitively-coupled to both long sides of the grounded conductive element.

13. The method of claim 12 , the electrically-floating conductive coupling element extends along both long sides of the grounded conductive element.

14. The method of claim 10 , wherein the electrically-floating conductive coupling element has a length of ¼ of a wavelength of a carrier wave signal radiated by the at least two antennas.

15. The method of claim 10 , wherein the electrically-floating conductive coupling element has a length of ½ of a wavelength of a carrier wave signal radiated by the at least two antennas.

16. The method of claim 10 further comprising:

adaptively tuning a mode of resonance of the isolator assembly using one or more tunable capacitors.

17. The method of claim 10 , wherein the electrically-floating conductive coupling element is a first electrically-floating conductive coupling element and is routed between the grounded conductive element and a second electrically-floating conductive coupling element capacitively coupled to the grounded conductive element, the second electrically-floating conductive coupling element having a different end-to-end length than the first electrically-floating conductive coupling element.

18. The method of claim 10 , wherein the electrically-floating conductive coupling element is a first electrically-floating conductive coupling element and is routed between the grounded conductive element and a second electrically-floating conductive coupling element capacitively coupled to the grounded conductive element.

19. A computing device comprising:

at least two antennas;

a capacitively-coupled isolator assembly positioned between the at least two antennas, the at least two antennas are electrically connected by a ground plane, the capacitively-coupled isolator assembly providing isolation between the at least two antennas and including a grounded conductive element electrically connected to the ground plane, a first electrically-floating conductive coupling element capacitively coupled to the grounded conductive element, and a second electrically-floating conductive coupling element capacitively coupled to the grounded conductive element, the second electrically-floating conductive coupling element having a different end-to-end length than the first electrically-floating conductive coupling element.

20. The computing device of claim 19 , wherein the first electrically-floating conductive coupling element is routed between the grounded conductive element and the second electrically-floating conductive coupling element.