Antenna configurations for compact device wireless communication

1. A duplex antenna system comprising:

first and second antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion; and

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion,

wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

2. The antenna system of claim 1 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

3. The antenna system of claim 1 , wherein the first and second feed lines are joined together.

4. The antenna system of claim 1 , further comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

5. The antenna system of claim 4 , wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

6. The antenna system of claim 4 , wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

7. The antenna system of claim 1 , further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

8. A wireless communication device configured to provide wireless communication to a host device when disposed in a mated position with the host device, the wireless communication device comprising:

a transceiver;

a controller in communication with the transceiver;

a modem in communication with the controller; and

a duplex antenna system for providing dual-band operation to the wireless communication system, the duplex antenna system including:

first and second antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion; and

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion.

9. The antenna system of claim 8 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

10. The antenna system of claim 8 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

11. The antenna system of claim 10 , wherein the first and second feed lines are joined together.

12. The antenna system of claim 8 , further comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

13. The antenna system of claim 12 , wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

14. The antenna system of claim 12 , wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

15. The antenna system of claim 8 , further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

16. A duplex antenna system comprising:

first and second antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion;

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion; and

at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

17. The antenna system of claim 16 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

18. The antenna system of claim 16 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

19. The antenna system of claim 18 , wherein the first and second feed lines are joined together.

20. The antenna system of claim 16 , wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

21. The antenna system of claim 16 , wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

22. The antenna system of claim 16 , further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

23. A duplex antenna system comprising:

first and second antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion;

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion; and

a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

24. The antenna system of claim 23 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

25. The antenna system of claim 23 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

26. The antenna system of claim 25 , wherein the first and second feed lines are joined together.

27. The antenna system of claim 23 , further comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

28. The antenna system of claim 27 , wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

29. The antenna system of claim 27 , wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

30. The antenna system of claim 23 , further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

31. A duplex antenna system comprising:

first and second co-planar antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion; and

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion.

32. The antenna system of claim 31 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

33. The antenna of claim 31 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

34. The antenna system of claim 33 , wherein the first and second feed lines are joined together.

35. The antenna system of claim 31 , flirther comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

36. The antenna system of claim 35 , wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

37. The antenna system of claim 36 , wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

38. The antenna system of claim 31 , further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

39. A duplex antenna system comprising:

first and second antenna portions that are at least partially separated by a excitation gap configured to provide duplex operation to the first and second antenna portions;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion; and

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion.

40. The antenna system of claim 39 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

41. The antenna of claim 39 , wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

42. The antenna system of claim 41 , wherein the first and second feed lines are joined together.

43. The antenna system of claim 39 , further comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

44. The antenna system of claim 43 , wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

45. The antenna system of claim 43 , wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

46. The antenna system of claim 39 , further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.