Vectorially Combined Distributed Power Amplifiers for Software-Defined Radio Applications


Narendra K., Limiti E., Paoloni C., Collantes J., Jansen R., Yarman S.

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol.60, no.10, pp.3189-3200, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 10
  • Publication Date: 2012
  • Doi Number: 10.1109/tmtt.2012.2207914
  • Title of Journal : IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
  • Page Numbers: pp.3189-3200

Abstract

A new technique for distributed power amplifier (DPA) design maximizing dc-RF conversion is presented. The topology is featured by the vectorial combination of the output current sources when the transistors are loaded by their distributed output networks. To verify the design concept, two prototype DPAs (a 600-mW pseudomorphic HEMT (pHEMT) DPA and a similar to 23-W pHEMT/GaN DPA) are designed, realized, built, and tested. To the authors' knowledge, the second DPA achieved state-of-the-art power performance (i.e., the combination of output power, gain, and efficiency) for DPAs within the frequency range up to 2 GHz, well suited for software-defined radio applications.