Negative Smith Chart

Negative Smith Chart

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In all passive waveguide structures, the primary circuit elements resistance and conductance act like absorbers of electromagnetic wave energy. As such, their mathematical sign is, by convention, positive. However, certain active electrical devices exist whose equivalent circuit can most conveniently be represented by negative resistance or negative conductance elements. Negative resistance and negative conductance circuit elements act more like sources than absorbers of electromagnetic wave energy.

Chapter Contents:

  • 12.1 Negative Resistance
  • 12.2 Graphical Representation of Negative Resistance
  • 12.3 Conformal Mapping of the Complete Smith Chart
  • 12.4 Reflection Coefficient Overlay for Negative Smith Chart
  • 12.5 Voltage or Current Transmission Coefficient Overlay for Negative Smith Chart
  • 12.6 Radial Scales for Negative Smith Chart
  • 12.6.1 Reflection Coefficient Magnitude
  • 12.6.2 Power Reflection Coefficient
  • 12.6.3 Return Gain, Db
  • 12.6.4 Standing Wave Ratio
  • 12.6.5 Standing Wave Ratio, Db
  • 12.6.6 Transmission Loss, 1-db Steps
  • 12.6.7 Transmission Loss Coefficient
  • 12.7 Negative Smith Chart Coordinates, Example of their Use
  • 12.7.1 Reflection Amplifier Circuit
  • 12.7.2 Representation of Tunnel Diode Equivalent Circuit on Negative Smith Chart
  • 12.7.3 Representation of Operating Parameters of Tunnel Diode
  • 12.7.4 Shunt-tuned Reflection Amplifier
  • 12.8 Negative Smith Chart

Inspec keywords: waveguide theory; electromagnetic wave absorption; equivalent circuits

Other keywords: passive waveguide structures; equivalent circuit; negative conductance elements; negative conductance circuit elements act; negative resistance; primary circuit elements resistance; electrical devices; negative smith chart; electromagnetic wave energy absorbers; primary circuit elements conductance

Subjects: Electromagnetic wave propagation; Electromagnetic waves: theory; General circuit analysis and synthesis methods; Waveguide and cavity theory

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