Mobile wireless communications device with RF shield and related methods

1. A mobile wireless communications device comprising:

a housing;

an antenna carried by said housing;

a circuit board carried by said housing;

a first radio frequency (RF) shield covering at least a portion of said circuit board; and

a second RF shield within said first RF shield and comprising a top, and a corner extension extending outwardly from said top.

2. The mobile wireless communications device according to claim 1 wherein said corner extension has at least one of a rectangular, triangular and curved shape.

3. The mobile wireless communications device according to claim 1 further comprising a power amplifier carried by said circuit board and covered by at least said first RF shield.

4. The mobile wireless communications device according to claim 3 wherein said power amplifier is also covered by said second RF shield.

5. The mobile wireless communications device according to claim 1 further comprising an antenna switch carried by said circuit board and covered by at least said first RF shield.

6. The mobile wireless communications device according to claim 5 wherein said antenna switch is also covered by said second RF shield.

7. The mobile wireless communications device according to claim 1 further comprising a filter carried by said circuit board and covered by at least said first RF shield.

8. The mobile wireless communications device according to claim 7 wherein said filter is also covered by said second RF shield.

9. The mobile wireless communications device according to claim 1 wherein said second RF shield comprises a plurality of legs extending from said top toward said circuit board.

10. The mobile wireless communications device according to claim 1 wherein said second RF shield comprises a plurality of sidewall skirts at least partially extending from said top toward said circuit board.

11. The mobile wireless communications device according to claim 1 wherein said top has a plurality of passageways therethrough.

12. The mobile wireless communications device according to claim 1 wherein said top has a rectangular shape.

13. The mobile wireless communications device according to claim 1 wherein said first and second RF shields each comprises metal.

14. A mobile wireless communications device comprising:

a housing;

an antenna carried by said housing;

a circuit board carried by said housing;

a first radio frequency (RF) shield covering at least a portion of said circuit board; and

a second RF shield within said first RF shield and comprising a top having a plurality of passageway therethrough, and a corner extension extending outwardly from said top;

said first and second RF shields each comprising metal.

15. The mobile wireless communications device according to claim 14 wherein said corner extension has at least one of a rectangular, triangular and curved shape.

16. The mobile wireless communications device according to claim 14 further comprising a power amplifier carried by said circuit board and covered by at least said first RF shield.

17. The mobile wireless communications device according to claim 16 wherein said power amplifier is also covered by said second RF shield.

18. The mobile wireless communications device according to claim 14 further comprising an antenna switch carried by said circuit board and covered by at least said first RF shield.

19. The mobile wireless communications device according to claim 18 wherein said antenna switch is also covered by said second RF shield.

20. The mobile wireless communications device according to claim 14 further comprising a filter carried by said circuit board and covered by at least said first RF shield.

21. The mobile wireless communications device according to claim 20 wherein said filter is also covered by said second RF shield.

22. The mobile wireless communications device according to claim 14 wherein said second RF shield comprises a plurality of legs extending from said top toward said circuit board.

23. The mobile wireless communications device according to claim 14 wherein said second RF shield comprises a plurality of sidewall skirts at least partially extending from said top toward said circuit board.

24. A method of making a mobile wireless communications device comprising:

providing a housing carrying an antenna and a circuit board;

positioning a first radio frequency (RF) shield to cover at least a portion of the circuit board; and

positioning a second RF shield within the first RF shield and comprising a top, and a corner extension extending outwardly from the top.

25. The method according to claim 24 wherein the corner extension has at least one of a rectangular, triangular and curved shape.

26. The method according to claim 24 further comprising positioning a power amplifier on the circuit board and covered by at least the first RF shield.

27. The method according to claim 26 wherein the power amplifier is also covered by the second RF shield.

28. The method according to claim 24 further comprising positioning an antenna switch on the circuit board and covered by at least the first RF shield.

29. The method according to claim 28 wherein the antenna switch is also covered by the second RF shield.

30. The method according to claim 24 further comprising poisoning a filter on the circuit board and covered by at least the first RF shield.

31. The method according to claim 30 wherein the filter is also covered by the second RF shield.

32. The method according to claim 24 wherein the second RF shield comprises a plurality of legs extending from the top toward the circuit board.

33. The method according to claim 24 wherein the second RF shield comprises a plurality of sidewall skirts at least partially extending from the top toward the circuit board.

34. The method according to claim 24 wherein the top has a plurality of passageways therethrough.