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4 - Test benches for wireless system characterization and modeling

Published online by Cambridge University Press:  05 June 2014

Nuno Borges Carvalho  and
Dominique Schreurs
Nuno Borges Carvalho
Affiliation:
Universidade de Aveiro, Portugal
Dominique Schreurs
Affiliation:
Katholieke Universiteit Leuven, Belgium
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Summary

Introduction

In this chapter the main objective is to present several test benches for modeling and characterization that allow a correct identification of several linear and nonlinear parameters useful for wireless systems. These benches include the following.

  1. 1. Test benches for characterization

  2. a. Power-meter measurement

  3. b. Noise-figure measurements

  4. c. Two-tone measurements

  5. d. VNA measurements

  6. e. NVNA measurements

  7. f. Modulated signal measurements

  8. g. Mixed-domain (analog and digital) measurements

  9. h. Temperature-dependent measurements

  10. 2. Test benches for behavioral modeling

  11. a. Volterra-series modeling

  12. b. State-space modeling

  13. c. Beyond S-parameters

Test benches for characterization

Power-meter measurements

As referred to in Chapters 1 and 2, power was the first important measurement to become available for radio communications, since it allows a wireless system engineer to calculate and predict some of the most important aspects of radio propagation. In order to measure power, a power meter should be used. A typical setup is presented in Fig. 4.1. A typical instrument is shown in Fig. 4.2.

When using a power meter, several steps should be executed prior to the measurement itself, and several parameters should be known in advance for tuning and selecting the correct set. The first step towards a power measurement is the correct selection of the power probe. The selection depends on the frequency range which the probe can cover, as well as the power range.

Type
Chapter
Information
Microwave and Wireless Measurement Techniques , pp. 166 - 216
Publisher: Cambridge University Press
Print publication year: 2013

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References

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