Transmission Lines

Transmission Lines

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Transmission lines are commonly used to connect test and measurement instruments to circuits under test. Transmission lines are used to control the effects of inductance and capacitance which are unavoidable in high-frequency systems. Coaxial transmission lines are the most common and provide the best shielding of the signals being measured. Measurement error can be introduced due to impedance mismatch at either end of a transmission line. These errors must be understood and minimized in order to ensure an accurate measurement.

Chapter Contents:

  • 11.1 The Need for Transmission Lines
  • 11.2 Distributed Model
  • 11.3 Characteristic Impedance
  • 11.4 Propagation Velocity
  • 11.5 Generator, Line, and Load
  • 11.6 Impedance Changes
  • 11.7 Sinusoidal Voltages
  • 11.8 Complex Reflection Coefficient
  • 11.9 Return Loss
  • 11.10 Standing Waves
  • 11.11 Input Impedance of a Transmission Line
  • 11.12 Measurement Error Due to Impedance Mismatch
  • 11.13 Line Losses
  • 11.14 Coaxial Lines
  • References

Inspec keywords: capacitance; instruments; inductance; coaxial cables

Other keywords: measurement instruments; high-frequency systems; measurement error; coaxial transmission lines; capacitance; inductance; impedance mismatch

Subjects: Waveguide and coaxial cable systems

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