A three-stage power amplifier （PA） for WLAN application in 2.4-2.5 GHz is presented. The proposed PA employs an adaptive bias circuit to adjust the operating point of the PA to improve the linearity of the PA. Two m...A three-stage power amplifier （PA） for WLAN application in 2.4-2.5 GHz is presented. The proposed PA employs an adaptive bias circuit to adjust the operating point of the PA to improve the linearity of the PA. Two methods to short the 2nd harmonic circuit are compared in the area of efficiency and gain of the PA. The PA is taped out in the process of 2/zm InGaP/GaAs HBT and is tested by the evaluation board. The measured results show that 31.5 dB power gain and 29.3 dBm PldB with an associated 40.4% power added efficiency （PAE） under the single tone stimulus. Up to 26.5 dBm output power can be achieved with an error vector magnitude （EVM） of lower than 3% under the 64QAM/OFDM WLAN stimulus.展开更多
基金supported by the National Natural Science Foundation of China(No.61201244)the Natural Science Fund of SUES(No.E1-0501-14-0168)
文摘A three-stage power amplifier （PA） for WLAN application in 2.4-2.5 GHz is presented. The proposed PA employs an adaptive bias circuit to adjust the operating point of the PA to improve the linearity of the PA. Two methods to short the 2nd harmonic circuit are compared in the area of efficiency and gain of the PA. The PA is taped out in the process of 2/zm InGaP/GaAs HBT and is tested by the evaluation board. The measured results show that 31.5 dB power gain and 29.3 dBm PldB with an associated 40.4% power added efficiency （PAE） under the single tone stimulus. Up to 26.5 dBm output power can be achieved with an error vector magnitude （EVM） of lower than 3% under the 64QAM/OFDM WLAN stimulus.
