These four reflections are plotted on the polar plot in Figure 3.įigure 3 – Polar Reflection Coefficients Building the Smith Chart For Z = 0, the reflection is 1∠0 or Cartesian 1,0.įor Z = ∞, the reflection is 1∠180 or Cartesian -1,0.įor Z = 23+j75, the reflection coefficient is 0.762∠64 or 0.333+j0.685 Where Z is the complex impedance R+jX and Z 0 is the characteristic impedance of the source.įor Z = Z 0, the reflection has a magnitude of zero, a dot at the center of the smith chart. The reflection coefficient of an impedance can be measured with a vector network analyzer.įigure 2 – Measured Reflection Coefficient It can be thought of as a polar reflection coefficient chart with overlaid impedance curves.įigure 1 – Smith Chart Reflection Coefficients It may also be used to solve impedance-matching problems. The Smith chart is a useful graphical tool to convert between impedances and reflection coefficients.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |