Efficient Linearization of Microwave Power Amplifiers

Abstract

The growing use of multiple-carrier, complex (multi-level, multi-phase), spectrally efficient waveforms such as quadrature-amplitude-modulation (QAM) and code division multiple access (CDMA) in communication systems is placing a growing demand on the power efficiency and linearity of microwave power amplifiers. Continuing reliance on vacuum electronics amplifiers such as traveling-wave tube amplifiers (TWTA) in space-based transponders and ground terminals requires tube designers to constantly develop new techniques to improve the efficiency and linearity of devices. To satisfy performance requirements, there is an increasing trend of designers incorporating preor post-linearization modules with the power amplifiers to improve overall system efficiency and linearity.1 Signal predistortion is a simple and effective linearization technique that has been used successfully for both solid-state power amplifiers (SSPA) and TWTAs.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2007
Accession Number
ADA516994

Entities

People

  • B. G. Danly
  • B. Levush
  • David K. Abe
  • J. X. Qiu
  • R. E. Myers
  • T. M. Antonsen Jr.

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Amplitude
  • Amplitude Modulation
  • C Band
  • Code Division Multiple Access
  • Communication Systems
  • Communications Techniques
  • Frequency
  • Information Systems
  • Microwave Frequency
  • Microwaves
  • Modulation
  • Multiple Access
  • Power Amplifiers
  • Traveling Wave Tubes
  • Traveling Waves
  • Waveforms

Fields of Study

  • Engineering

Readers

  • Economics
  • Electronics Engineering
  • Radio communications and signal processing.

Technology Areas

  • Microelectronics
  • Space