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IPP S-Parameter viewer Instructions

Chart Type   choose your chart type from the drop down box:  Log-Magnitude, Smith Chart or Unwrapped Phase

Parameter Check boxes   Use the checkboxes to view individual S-Parameters, or choose to view by groups:  All Transmission, All Reflection, All Isolation or All Parameters.

Return to Product Page   Click the link at the top left to return to the product page.

 

   Interactive features.

    Point Label Tooltip     When you hover your mouse over each s-parameter trace marker, a label appears with  x data,  y data,  s-parameter type, and  In Band or  Out of Band indicators

 

 When hovering over the s-parameter chart, the interactive icon buttons appear on the bottom left.  It unlocks interactive features including the Reset button,  the  Zoom Button,  and the  BoxZoom button

    Zoom Button  Clicking the Zoom button allows zoom control with your Mouse Scroll, it also allows to  Grab and drag, by clicking and holding anywhere on the chart

    Box Zoom Button  The Zoom button allows a more detailed zoom control. Click and drag in a square pattern anywhere on the chart to zoom into that square.  To retain Point Label Tooltip interaction, you must click the standard zoom button again

    Reset Button  Clicking the Reset button brings you back to your original state.

 

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S-Parameter definitions

Scattering parameters   describes the input-output relationships between ports in an electrical system. Specifically at high frequency it becomes essential to describe a given network in terms of waves rather than voltage or current. Thus in S-parameters we use power waves.

For a two port network, s-parameters can be defined as,

S11   is the input port voltage reflection coefficient.

S12   is the reverse voltage gain.

S21   is the forward voltage gain.

S22   is the output port voltage reflection coefficient.

The S-parameter matrix can be used to determine reflection coefficients and transmission gains from both sides of a two port network. This concept can further be used to determine s-parameters of a multi port network.

These concepts can further be used in determining Gain, Return loss, VSWR and Insertion Loss.

Return Loss   can be thought of as a measure of how close the actual input/output impedance of the network is to the nominal system impedance value.

                  

 

VSWR is defined as,

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