Electronic device with multiple antenna diversity and related methods

1. An electronic device comprising:

a mobile wireless communications device comprising

a first housing,

a spatial diversity wireless transceiver carried by said first housing,

at least one first antenna carried by said first housing and coupled to said spatial diversity wireless transceiver, and

an interface carried by said first housing and coupled to said spatial diversity wireless transceiver; and

an external antenna device comprising a second housing, and at least one second antenna carried thereby and configured to be coupled to said spatial diversity wireless transceiver;

said spatial diversity wireless transceiver configured to selectively operate said at least one first antenna and said at least one second antenna to provide spatial diversity;

said interface configured to couple said spatial diversity wireless transceiver to said at least one second antenna and provide an audio headset connection;

said mobile wireless communications device comprising a processor configured to

operate said spatial diversity wireless transceiver in a first multiple-input/multiple-output (MIMO) rank mode when said at least one second antenna is not connected to said spatial diversity wireless transceiver, and

operate said spatial diversity wireless transceiver in a second MIMO rank mode when said at least one second antenna is connected to said spatial diversity wireless transceiver, the second MIMO rank mode being greater than the first MIMO rank mode.

2. The electronic device of claim 1 wherein said interface comprises a connector carried by said first housing and coupled to said spatial diversity wireless transceiver; and wherein said external antenna device comprises a cable extending from said second housing and configured to be coupled between said at least one second antenna and said connector.

3. The electronic device of claim 2 wherein said connector comprises a tip ring sleeve (TRS) connector carried by an external surface of said first housing.

4. The electronic device of claim 1 wherein said interface comprises a wireless local area networking (WLAN) transceiver configured to wirelessly couple said at least one second antenna to said spatial diversity wireless transceiver.

5. The electronic device of claim 1 wherein said interface comprises a Bluetooth wireless transceiver configured to wirelessly couple said at least one second antenna to said spatial diversity wireless transceiver.

6. The electronic device of claim 1 wherein said spatial diversity wireless transceiver comprises a cellular 3 GPP Long Term Evolution (LTE) transceiver.

7. The electronic device of claim 1 wherein said at least one first antenna is internal with respect to said first housing; and wherein said at least one second antenna is internal with respect to said second housing.

8. A mobile wireless communications device comprising:

a first housing;

a spatial diversity wireless transceiver carried by said first housing;

at least one first antenna carried by said first housing and coupled to said spatial diversity wireless transceiver;

an interface carried by said first housing, coupled to said spatial diversity wireless transceiver, and configured to

be coupled to an external antenna device comprising a second housing, and at least one second antenna carried thereby, and

provide an audio headset connection;

said spatial diversity wireless transceiver configured to selectively operate said at least one first antenna and the at least one second antenna to provide spatial diversity; and

a processor configured to

operate said spatial diversity wireless transceiver in a first multiple-input/multiple-output (MIMO) rank mode when the at least one second antenna is not connected to said spatial diversity wireless transceiver, and

operate said spatial diversity wireless transceiver in a second MIMO rank mode when the at least one second antenna is connected to said spatial diversity wireless transceiver, the second MIMO rank mode being greater than the first MIMO rank mode.

9. The mobile wireless communications device of claim 8 wherein said interface comprises a connector carried by said first housing and coupled to said spatial diversity wireless transceiver; and wherein the external antenna device comprises a cable extending from the second housing and configured to be coupled between the at least one second antenna and said connector.

10. The mobile wireless communications device of claim 9 wherein said connector comprises a tip ring sleeve (TRS) connector carried by an external surface of said first housing.

11. The mobile wireless communications device of claim 8 wherein said interface comprises a wireless local area networking (WLAN) transceiver configured to wirelessly couple the at least one second antenna to said spatial diversity wireless transceiver.

12. The mobile wireless communications device of claim 8 wherein said interface comprises a Bluetooth wireless transceiver configured to wirelessly couple the at least one second antenna to said spatial diversity wireless transceiver.

13. A method of providing spatial diversity in an electronic device comprising a mobile wireless communications device including a first housing, a spatial diversity wireless transceiver carried by the first housing, and at least one first antenna carried by the first housing and coupled to the spatial diversity wireless transceiver, the method comprising:

coupling an external antenna device comprising a second housing, and at least one second antenna carried thereby to the spatial diversity wireless transceiver;

using the spatial diversity wireless transceiver to selectively operate the at least one first antenna and the at least one second antenna to provide the spatial diversity;

coupling the spatial diversity wireless transceiver to the at least one second antenna with an interface carried by the first housing, the interface also providing an audio headset connection;

operating the spatial diversity wireless transceiver in a first multiple-input/multiple-output (MIMO) rank mode when the at least one second antenna is not connected to the spatial diversity wireless transceiver; and

operating the spatial diversity wireless transceiver in a second MIMO rank mode when the at least one second antenna is connected to the spatial diversity wireless transceiver, the second MIMO rank mode being greater than the first MIMO rank mode.

14. The method of claim 13 wherein the interface comprises a connector carried by the first housing and coupled to the spatial diversity wireless transceiver; and further comprising coupling a cable extending from the second housing and between the at least one second antenna and the connector.

15. The method of claim 14 wherein the connector comprises a tip ring sleeve (TRS) connector carried by an external surface of the first housing.

16. The method of claim 13 wherein the interface comprises a wireless local area networking (WLAN) transceiver to wirelessly couple the at least one second antenna to the spatial diversity wireless transceiver.

17. The method of claim 13 wherein the interface comprises a Bluetooth wireless transceiver to wirelessly couple the at least one second antenna to the spatial diversity wireless transceiver.

18. An electronic device comprising:

a mobile wireless communications device comprising

a first housing,

a spatial diversity wireless transceiver carried by said first housing,

at least one first antenna carried by said first housing and coupled to said spatial diversity wireless transceiver, and

a processor configured to operate said spatial diversity wireless transceiver; and

an external antenna device comprising a second housing, and at least one second antenna carried thereby and configured to be coupled to said spatial diversity wireless transceiver;

said spatial diversity wireless transceiver configured to selectively operate said at least one first antenna and said at least one second antenna to provide spatial diversity;

said processor configured to

operate said spatial diversity wireless transceiver in a first multiple-input/multiple-output (MIMO) rank mode when said at least one second antenna is not connected to said spatial diversity wireless transceiver, and

operate said spatial diversity wireless transceiver in a second MIMO rank mode when said at least one second antenna is connected to said spatial diversity wireless transceiver, the second MIMO rank mode being greater than the first MIMO rank mode.

19. A mobile wireless communications device comprising:

a first housing;

a spatial diversity wireless transceiver carried by said first housing;

at least one first antenna carried by said first housing and coupled to said spatial diversity wireless transceiver;

an interface carried by said first housing, coupled to said spatial diversity wireless transceiver, and configured to be coupled to an external antenna device comprising a second housing, and at least one second antenna carried thereby; and

a processor configured to operate said spatial diversity wireless transceiver;

said spatial diversity wireless transceiver configured to selectively operate said at least one first antenna and the at least one second antenna to provide spatial diversity;

said processor configured to

operate said spatial diversity wireless transceiver in a first multiple-input/multiple-output (MIMO) rank mode when said at least one second antenna is not connected to said spatial diversity wireless transceiver, and

operate said spatial diversity wireless transceiver in a second MIMO rank mode when said at least one second antenna is connected to said spatial diversity wireless transceiver, the second MIMO rank mode being greater than the first MIMO rank mode.

20. A method of providing spatial diversity in an electronic device comprising a mobile wireless communications device including a first housing, a spatial diversity wireless transceiver carried by the first housing, and at least one first antenna carried by the first housing and coupled to the spatial diversity wireless transceiver, the method comprising:

coupling an external antenna device comprising a second housing, and at least one second antenna carried thereby to the spatial diversity wireless transceiver;

using the spatial diversity wireless transceiver to selectively operate the at least one first antenna and the at least one second antenna to provide the spatial diversity;

operating the spatial diversity wireless transceiver in a first multiple-input/multiple-output (MIMO) rank mode when the at least one second antenna is not connected to the spatial diversity wireless transceiver; and

operating the spatial diversity wireless transceiver in a second MIMO rank mode when the at least one second antenna is connected to the spatial diversity wireless transceiver, the second MIMO rank mode being greater than the first MIMO rank mode.