Program Overview

SData+is an interactive s-parameter and noise data enhancement & parameter calculation utility for the RF/Microwave engineer. It allows you to scan device data files, and then fit a 3rd degree natural spline function, a  french curve, to either the s-parameter or noise data.

In addition to spline fitting the data, which is much closer than the usual linear interpolation type fit, you can perform a variety of calculations on the data itself, and then display the results on-screen.


Special Features

If you decide it is reasonable to make a unilateral assumption, because S12, the reverse transmission coefficient, is small, the Calculations Module will generate the impedance equivalents of S11 or S22, thus providing reasonably close approximations to the in/out impedance of the device.

If noise data is chosen for analysis, this module will calculate the conjugate noise impedance, i.e., the conjugate of the impedance equivalent of the optimum noise match reflection coefficient. This is what you would want to translate, via a match network, to 50 ohms, (or whatever), to create a proper noise match.

This module will also create .IMP impedance files for use by SmithMatch, our on-screen Smith Chart match network design program. In addition, it will create .CKT files for use by Sceptre, our frequency domain circuit analysis program. See Appendix C for information on these file formats.

Note: If you click on the link above to view Appendix C, use your browser BACK button to return here.