Hi, I am an Electronics Engineer with BSc in Electronics Engineering and an MSC in Electronics/Telecommunications (primarily in RF & Microwave Engineering), I am an expert with circuits related explicitly to power amplifiers, Common emitter/base/collector amplifiers, RF power amplifiers, SUCH AS low noise amplifiers, high power amplifiers, many either FET (Field effect transistors) based amplifiers, two-stage LNA, HPAs.
I know the critical ingredients of the amplifiers, such as biasing circuits, the input/output matching networks, RC circuits, Tank circuits, indicators, resistors, coupling and bypass capacitors; I am proficient with RLC circuits theory and engineering.
The main parameters in amplifier design are power output, PAE, 1-dB compression point, third order intercept point, AM-PM conversion PAPR, power back off, ACLR, ACPR and EVM. The architectures for the power amplifier available are EER, Doherty, envelope tracking and out-phasing amplifiers. The out-phasing amplifier consists of the transformation of the amplitude and phase signal into two phase signals.
Doherty uses two amplifiers, one main and one auxiliary amplifier; the main carrier amplifier is saturated first from low power levels with the auxiliary off, then the auxiliary is biased at the efficiency threshold, and the efficiency is maintained with no excessive distortion. This is called active load-pull distortion.
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