Movatterモバイル変換

• Guohua LIU

  Hangzhou Dianzi University

• Huabang ZHONG

  Hangzhou Dianzi University

• Cantianci GUO

  Hangzhou Dianzi University

• Zhiqun CHENG

  Hangzhou Dianzi University

This paper proposes a methodology for designing broadband class B/J power amplifier based on a mirrored lowpass filter matching structure. According to this filter theory, the impedance of this design method is mainly related to the cutoff frequency. Series inductors and shunt capacitors filter out high frequencies. The change of input impedance with frequency is small in the passband. Which can suppress higher harmonics and expand bandwidth. In order to confirm the validity of the design method, a broadband high-efficiency power amplifier in the 1.3 - 3.9GHz band is designed and fabricated. Measurement results show that the output power is greater than 40.5dBm, drain efficiency is 61.2% - 70.8% and the gain is greater than 10dB.