Quadrature communications device with I antennas and Q antennas and related methods

1. A communications device comprising:

a plurality of In-phase (I) power amplifiers configured to respectively generate a plurality of I amplified signals;

a plurality of Quadrature (Q) power amplifiers configured to respectively generate a plurality of Q amplified signals;

a plurality of I antennas respectively coupled to said plurality of I power amplifiers;

a plurality of Q antennas respectively coupled to said plurality of Q power amplifiers;

an I controller coupled to said plurality of I power amplifiers and configured to selectively enable at least one of said plurality of I power amplifiers based upon at least a distance from a network tower; and

a Q controller coupled to said plurality of Q power amplifiers and configured to selectively enable at least one of said plurality of Q power amplifiers based upon at least the distance from the network tower.

2. The communications device of claim 1 further comprising an I digital-to-analog converter (DAC) configured to generate an I bias current signal for said plurality of I power amplifiers, and a Q DAC configured to generate a Q bias current signal for said plurality of Q power amplifiers.

3. The communications device of claim 2 further comprising an I look-up table (LUT) module upstream of said I DAC and configured to supply a linear I signal thereto, and a Q LUT module upstream of said Q DAC and configured to supply a linear Q signal thereto.

4. The communications device of claim 1 wherein said I controller is configured to cause said plurality of I power amplifiers to modulate an I carrier signal into the plurality of I amplified signals based upon an I digital baseband signal.

5. The communications device of claim 4 wherein said Q controller is configured to cause said plurality of Q power amplifiers to modulate a Q carrier signal into the plurality of Q amplified signals based upon a Q digital baseband signal.

6. The communications device of claim 1 wherein said pluralities of I and Q antennas are physically separated.

7. The communications device of claim 5 further comprising a phase locked loop (PLL) configured to generate the I and Q carrier signals.

8. The communications device of claim 7 wherein said PLL is configured to generate the I and Q carrier signals comprising constant envelop I and Q carrier signals.

9. The communications device of claim 7 further comprising a 90/270-degree phase shifter between said PLL and said plurality of Q power amplifiers.

10. The communications device of claim 1 wherein each of said I and Q antennas comprises a respective rectangular-shaped strip antenna; and wherein said pluralities of I and Q rectangular-shaped strip antennas are adjacent to each other.

11. A communications device comprising:

a plurality of In-phase (I) power amplifiers configured to respectively generate a plurality of I amplified signals;

a plurality of Quadrature (Q) power amplifiers configured to respectively generate a plurality of Q amplified signals;

a plurality of a strip I antennas respectively coupled to said plurality of I power amplifiers;

a plurality of strip Q antennas respectively coupled to said plurality of Q power amplifiers;

an I controller coupled to said plurality of I power amplifiers and configured to selectively enable at least one of said plurality of I power amplifiers based upon at least a distance from a network tower;

a Q controller coupled to said plurality of Q power amplifiers and configured to selectively enable at least one of said plurality of Q power amplifiers based upon at least the distance from the network tower; and

a phase locked loop (PLL) configured to generate I and Q carrier signals for said pluralities of I and Q power amplifiers.

12. The communications device of claim 11 further comprising an I digital-to-analog converter (DAC) configured to generate an I bias current signal for said plurality of I power amplifiers, and a Q DAC configured to generate a Q bias current signal for said plurality of Q power amplifiers.

13. The communications device of claim 12 further comprising an I look-up table (LUT) module upstream of said I DAC and configured to supply a linear I signal thereto, and a Q LUT module upstream of said Q DAC and configured to supply a linear Q signal thereto.

14. The communications device of claim 11 wherein said I controller is configured to cause said plurality of I power amplifiers to modulate the I carrier signal into the plurality of I amplified signals based upon an I digital baseband signal.

15. The communications device of claim 14 wherein said Q controller is configured to cause said plurality of Q power amplifiers to modulate the Q carrier signal into the plurality of Q amplified signals based upon a Q digital baseband signal.

16. The communications device of claim 11 wherein said pluralities of strip I and Q antennas are physically separated.

17. A method of operating a communications device comprising:

using a plurality of In-phase (I) power amplifiers to respectively generate a plurality of I amplified signals;

using a plurality of Quadrature (Q) power amplifiers to respectively generate a plurality of Q amplified signals;

using an I controller to selectively enable at least one of the plurality of I power amplifiers based upon at least a distance from a network tower;

using a Q controller to selectively enable at least one of the plurality of Q power amplifiers based upon at least the distance from the network tower; and

using pluralities of I and Q antennas to respectively transmit the pluralities of I and Q amplified signals.

18. The method of claim 17 further comprising using an I digital-to-analog converter (DAC) to generate an I bias current signal for the plurality of I power amplifiers, and using a Q DAC to generate a Q bias current signal for the plurality of Q power amplifiers.

19. The method of claim 18 further comprising using an I look-up table (LUT) module upstream of the I DAC to supply a linear I signal thereto, and using a Q LUT module upstream of the Q DAC to supply a linear Q signal thereto.

20. The method of claim 17 further comprising using the I controller to cause the plurality of I power amplifiers to modulate an I carrier signal into the plurality of I amplified signals based upon an I digital baseband signal.

21. The method of claim 20 further comprising using the Q controller to cause the plurality of Q power amplifiers to modulate a Q carrier signal into the plurality of Q amplified signals based upon a Q digital baseband signal.

22. The method of claim 17 further comprising using physically separated pluralities of the I and Q antennas to respectively transmit the pluralities of I and Q amplified signals.