"Len Anderson" wrote in message
...
In article V4MId.24238$IV5.16993@attbi_s54, "William E. Sabin"
writes:

Here is a suggestion to provide terrific help with all kinds of math
calculations. Mathcad is an excellent program that I have used for many
years. It should be easy to find an older version such as 4.0 or 6.0 at
very low cost which will do just about anything you can think of (I have
version 12.0). This software is easy to get started with and can be
learned
more deeply with experience. Be sure to get the User Manual also. The
equation that you illustrated is a piece of cake using Mathcad and complex
S
parameters. And the complex values of Z11 can be graphed on a polar or xy
plot by the program over a wide frequency range.

Amazon.Com has a 6.0 version for $40 at this time (Sunday mornng). Be sure
to get the User Manual.


Mathcad is a nice - but EXPENSIVE - computer program.

$40 for a program as powerful and multi-faceted as Mathcad 6.0 seems to me
to be quite a bargain and a gateway to a whole world of applied mathematics.

Bill W0IYH