Differential power amplifier

An antenna system, comprising:

• a differential antenna;
• a differential power amplifier communicably coupled to the differential antenna, the differential power amplifier providing an amplified differential output signal to the differential antenna, the amplified differential output signal corresponding to a differential input signal, the differential power amplifier comprising:
• a p-side half circuit having a p-side base configured to receive an in-phase signal of the differential input signal;
• an n-side half circuit having an n-side base configured to receive an out-of-phase signal of the differential input signal;
• a p-side biasing circuit configured to provide a controllable p-side biasing signal to the p-side base;
• an n-side biasing circuit configured to provide a controllable n-side biasing signal to the n-side base, whereby the n-side biasing circuit and p-side biasing circuit operate independently of one another;
• a power source configured to apply a positive direct current (DC) voltage to a collector of the n-side half circuit and a collector of the p-side half circuit of the power amplifier;
• and
• supply and grounding circuit structures which provides common mode DC paths for the collector and emitter of the n-side and p-side half circuit to the power source and absolute ground, and balances the n-side and p-side half circuits to provide a radio frequency (RF) virtual ground to the emitter of the n-side half circuit and p-side half circuit;
• and
• first and second capacitors arranged in series and extending between the p-side base of the p-side half circuit and the n-side base of the n-side half circuit, whereby the first and second capacitors are balanced to provide a second RF virtual ground between the first and second capacitors.

An antenna system, comprising:

• a differential antenna;
• a differential power amplifier communicably coupled to the differential antenna, the differential power amplifier providing an amplified differential output signal to the differential antenna, the amplified differential output signal corresponding to a differential input signal, the differential power amplifier comprising:
• a p-side half circuit having a p-side base configured to receive an in-phase signal of the differential input signal;
• an n-side half circuit having an n-side base configured to receive an out-of-phase signal of the differential input signal;
• a p-side biasing circuit configured to provide a controllable p-side biasing signal to the p-side base;
• an n-side biasing circuit configured to provide a controllable n-side biasing signal to the n-side base, whereby the n-side biasing circuit and p-side biasing circuit operate independently of one another;
• a power source configured to apply a positive direct current (DC) voltage to a collector of the n-side half circuit and a collector of the p-side half circuit of the power amplifier;
• and
• supply and grounding circuit structures which provides common mode DC paths for the collector and emitter of the n-side and p-side half circuit to the power source and absolute ground, and balances the n-side and p-side half circuits to provide a radio frequency (RF) virtual ground to the emitter of the n-side half circuit and p-side half circuit;
• and
• a negative RF feedback circuit comprising a resistor in series with an inductor, the negative RF feedback circuit positioned between the collector of the p-side half circuit and the p-side base of the p-side half circuit.

An antenna system, comprising:

• a differential antenna;
• a differential power amplifier communicably coupled to the differential antenna, the differential power amplifier providing an amplified differential output signal to the differential antenna, the amplified differential output signal corresponding to a differential input signal, the differential power amplifier comprising:
• a p-side half circuit having a p-side base configured to receive an in-phase signal of the differential input signal;
• an n-side half circuit having an n-side base configured to receive an out-of-phase signal of the differential input signal;
• a p-side biasing circuit configured to provide a controllable p-side biasing signal to the p-side base;
• an n-side biasing circuit configured to provide a controllable n-side biasing signal to the n-side base, whereby the n-side biasing circuit and p-side biasing circuit operate independently of one another;
• a power source configured to apply a positive direct current (DC) voltage to a collector of the n-side half circuit and a collector of the p-side half circuit of the power amplifier;
• supply and grounding circuit structures which provides common mode DC paths for the collector and emitter of the n-side and p-side half circuit to the power source and absolute ground, and balances the n-side and p-side half circuits to provide a radio frequency (RF) virtual ground to the emitter of the n-side half circuit and p-side half circuit;
• and
• first and second capacitors arranged in series and extending between the p-side base of the p-side half circuit and the n-side base of the n-side half circuit, whereby the first and second capacitors are balanced to provide a second RF virtual ground between the first and second capacitors.