Setting method for amplifying cluster communication power and power amplifier
A technology for power amplifiers and power amplification, applied in power amplifiers, improving amplifiers to reduce nonlinear distortion, etc., can solve problems such as poor control intelligence, poor communication stability, and limited communication range, and achieve improved linearity and high stability , Gain adjustment convenient effect
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[0018] The invention mainly consists of several parts including power amplification, power detection, temperature compensation power supply, automatic gain control and harmonic filter. System structure frame of power amplifier figure 1 Shown:
[0019] The power amplification part adopts the power back-off technology to carry out the high linearization design of the power amplifier, and improves the high linearity and third-order intermodulation coefficient of the power amplifier by sacrificing part of the working efficiency. The power amplification part is mainly divided into two parts: pre-amplification and final-stage amplification. The cascaded working mode with optimized inter-stage matching makes the circuit have the advantages of convenient debugging and simple structure.
[0020] The design uses transistor MRF859 with high reliability and gain and LDMOS power amplifier tube MRF9060 as the front-stage power amplifier and final-stage power amplifier module; HMC273MSIOG f...
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