Emitter ballasting resistor design of InGaP/GaAs power HBT for high linearity based on Volterra Series distortion analysis.
Microelectronics Journal(2018)
摘要
A distortion analysis of InGaP/GaAs HBT is presented based on Volterra Series. The interdependence between emitter ballasting resistor and linearity has been quantitatively analyzed. An optimized emitter ballasted power amplifier (PA) is designed and fabricated. Third-order intermodulation (IM3) of the PA is suppressed by 3–8 dB without sacrificing power gain and PAE. The theoretical calculation and measurement results show the optimization of emitter ballasting resistor is an alternative technique to improve PAs' linearity.
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关键词
Volterra series,IM3,Emitter ballasting resistor,Power amplifier
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