Quadrature communications device with i antennas and q antennas and modulated power supply and related methods

A communications device comprising:

• an In-phase (I) power amplifier configured to generate an I amplified signal;
• a Quadrature (Q) power amplifier configured to generate a Q amplified signal;
• an I digital-to-analog converter (DAC) configured to generate an I signal;
• a Q DAC configured to generate a Q signal;
• a phase locked loop (PLL) configured to generate I and Q carrier signals;
• an I power supply circuit coupled to said I power amplifier and to said I DAC and configured to cause said I power amplifier to modulate the I carrier signal into the I amplified signal based upon the I signal;
• a Q power supply circuit coupled to said Q power amplifier and to said Q DAC and configured to cause said Q power amplifier to modulate the Q carrier signal into the Q amplified signal based upon the Q signal;
• an I antenna coupled to said I power amplifier;
• and
• a Q antenna coupled to said Q power amplifier and being physically separated from said I antenna.

A method of operating a communications device comprising:

• using an In-phase (I) power amplifier to generate an I amplified signal;
• using a Quadrature (Q) power amplifier to generate a Q amplified signal;
• using an I digital-to-analog converter (DAC) to generate an I signal;
• using a Q DAC to generate a Q signal;
• using an I power supply circuit to cause the I power amplifier to modulate an I carrier signal into the I amplified signal based upon the I signal;
• using a Q power supply circuit to cause the Q power amplifier to modulate a Q carrier signal into the Q amplified signal based upon the Q signal;
• and
• using at least one antenna to transmit the and Q amplified signals.