1-8 GHz high efficiency single stage travelling wave power amplifier


Sayginer M., Yazgı M., Kuntman H. H., Virdee B. S.

7th International Conference on Electrical and Electronics Engineering, ELECO 2011, Bursa, Turkey, 1 - 04 December 2011 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Bursa
  • Country: Turkey
  • Istanbul Technical University Affiliated: Yes

Abstract

In this paper a Class-A/AB operated wideband power amplifier is presented that comprises of only a single transistor travelling wave stage where capacitive coupling and frequency dependent lossy artificial transmission-line are employed at the input of the active device. These technique are shown to significantly enhance the amplifier frequency-bandwidth product, input match and gain flatness performance over 1-to-8 GHz operating bandwidth. Furthermore, a non-terminated output artificial transmission line inductance is determined using load-pull data to achieve an optimum power-bandwidth performance. Overall 1.31×2.93mm 2 power amplifier design is fabricated by using 0.25μm GaAs PHEMT MMIC process and the amplifier delivers 1W and 0.5W peak P sat and P out, 1dB levels respectively where the PAE levels are over 50% and 27% for P sat, and P out, 1dB almost the entire 2-to-8 GHz frequency band. © 2011 Chamber of Turkish Electric.