Stability analysis and stabilization of power amplifiers

Almudena Suárez, Sanggeun Jeon, David Rutledge

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Some of the most common instability phenomena in power amplifiers (PAs) are explained. PAs are used in wireless communications, radar, RF heating and imaging. Recently developed stability-analysis tools can be used for understanding the desired behavior, which can be efficiently predicted and corrected at the simulation stage. The techniques, based on harmonic balance, have been illustrated by means of their application to Class E/F amplifiers at 29 MHz, which exhibited self-oscillation, hysteresis, and chaos. A simplified equivalent circuit at the oscillation frequency has been derived, enabling an efficient determination of the topology and location of the required stabilization network. The circuit has been globally stabilized for all the expected values of drain-bias voltage and input power.

Original languageEnglish
Pages (from-to)51-65
Number of pages15
JournalIEEE Microwave Magazine
Volume7
Issue number5
DOIs
Publication statusPublished - 2006 Oct 1
Externally publishedYes

Fingerprint

power amplifiers
Power amplifiers
Stabilization
stabilization
self oscillation
wireless communication
Bias voltage
equivalent circuits
Chaos theory
Equivalent circuits
radar
Hysteresis
chaos
Radar
topology
amplifiers
hysteresis
Topology
harmonics
Imaging techniques

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)
  • Radiation

Cite this

Stability analysis and stabilization of power amplifiers. / Suárez, Almudena; Jeon, Sanggeun; Rutledge, David.

In: IEEE Microwave Magazine, Vol. 7, No. 5, 01.10.2006, p. 51-65.

Research output: Contribution to journalArticle

Suárez, Almudena ; Jeon, Sanggeun ; Rutledge, David. / Stability analysis and stabilization of power amplifiers. In: IEEE Microwave Magazine. 2006 ; Vol. 7, No. 5. pp. 51-65.
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