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Load pull characterization

Load pull characterization

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The Chapter begins with a discussion of the definition of load pull. It goes on to consider scalar and vector load pull, why load pull is needed, load pull methods, reflection on a variable passive load, injection of a coherent (active) signal, impedance tuners, harmonic load pull, fundamental versus harmonic load pull, on wafer integration, base-band load pull, active tuning, and data transfer into CAD and nonlinear models.

Chapter Contents:

  • 3.1 Definition of load pull
  • 3.2 Scalar and vector load pull
  • 3.3 Why is load pull needed?
  • 3.4 Load pull methods
  • 3.5 Reflection on a variable passive load
  • 3.6 Injection of coherent (active) signal
  • 3.6.1 The "split signal" method
  • 3.6.2 The "active load" method
  • 3.6.3 "Open loop" active injection
  • 3.6.4 "Hybrid" combination
  • 3.7 Impedance tuners
  • 3.7.1 Passive tuners
  • 3.7.2 Electronic (passive) tuners
  • 3.7.3 Wideband tuners
  • 3.7.4 High power tuners
  • 3.8 Harmonic load pull
  • 3.8.1 Passive harmonic load pull using di-tri-plexers
  • 3.8.2 Harmonic rejection tuners
  • 3.8.3 Wideband multiharmonic tuners
  • 3.8.4 Low frequency tuners
  • 3.8.5 Special tuners
  • 3.9 Fundamental versus harmonic load pull
  • 3.10 On wafer integration
  • 3.11 Base-band load pull
  • 3.12 Advanced considerations on active tuning
  • 3.12.1 Introduction
  • 3.12.2 Closed loop (active load)
  • 3.12.3 Open loop—split signal
  • 3.12.4 Quasi-closed-loop load pull
  • 3.13 Data transfer into CAD and nonlinear models
  • Acknowledgments
  • References

Inspec keywords: microwave power amplifiers; electronic design automation; radiofrequency power amplifiers; circuit tuning

Other keywords: CAD models; variable passive load reflection; base-band load pull; active tuning; coherent active signal injection; scalar load pull; nonlinear models; impedance tuners; data transfer; harmonic load pull; on wafer integration; vector load pull

Subjects: Amplifiers; Microwave circuits and devices

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