A Study on Linearity and Efficiency Improvement for 3-Way Doherty Amplifier

3-Way Doherty 증폭기의 선형성 및 효율 개선에 관한 연구

  • Hong, Yong-Eui (School. of Electronics Engineering, Soongsil University) ;
  • Yang, Seung-In (School. of Electronics Engineering, Soongsil University)
  • 홍용의 (숭실대학교 정보통신 전자공학부) ;
  • 양승인 (숭실대학교 정보통신 전자공학부)
  • Published : 2005.11.05

Abstract

In this paper, Compact Microstrip Resonants Cell(CMRC) have been employed to suppress IMD(Intermodulation Distortion) of the 3-Way Doherty amplifier. This method can not only improve the linearly and the efficiency but also is simpler, smaller and more inexpensive than existing linearly methods; (for example Harmonic feedback, Back off, Feed-forward, Predistortion and so on.) Also, the proposed 3-way Doherty amplifier using only one divider has been reduced size of existing 3-Way Doherty amplifier. As a result, the proposed Doherty amplifier using CMRC and only one divider has been improved for the IMD$_3$ by 4.474dBc, and the PAE by 9.199%, respectively.

Keywords

Doherty;IMB;CMRC;Linearly;PAE