RFC12 is a Smith Chart design and analysis tool.  You can position the cursor ( a dot ) to any point on
the chart, and get the impedance, admittance, reflection coefficient (all as vectors).  Then, tuning elements
can be added (impedances and/or transmission lines) to match loads not equal to Z0.

The following is the contents of the file README.RFC, written by the author, and which is part of the software package:

                         **  NEW RELEASE 1.2  **


RFC is a Smith Chart program dedicated to Radio Frequency design engineers and students.

Using the program you can synthetize and analyze an electric matching network
composed of impedances, inductors, capacitors and transmission lines.

The goal of the program is to match impedances; the number of elements of the electric network must be less than nine.

The software is built around the graphic methods proposed by P. H. Smith.

Each element of the network has one or two variable parameters. You can tune the parameters by keyboard and the resulting Smith graph is dynamically updated on the screen.

The RFC keyboard is "a sea of trimmers" enabling fast optimizations by a highly interactive user interface.
WARNING: the program is "case sensitive".

The program is also capable of frequency analysis and plots, MonteCarlo simulations, schematic synthesis, etc. It comes with a nice calculator for complex numbers and an on line help.

Provided that you know the Smith chart design procedure, you can learn and use RFC by yourself.

I suggest that the hardware should be a 386 PC; the math coprocessor is
useful and recommended. The video interface must be an EGA or a VGA .

The program has been carefully tested and appears to be defect free, but there is NO WARRANTY that the program works correctly with any electric network.

THIS PROGRAM IS FREEWARE : you are not allowed to sell the program, you are allowed to distribute the program complete with all the files and this README file without any charge except the cost of the media.
Future developments depend on your feedback.


You can enter admittance 0+j0 at start point (key <I>) without errors.
You can enter impedance  0+j0 at start point (Key <I>) without errors.
Info. display now prints R+jX (impedance) and G+jB (admittance).

Now you have stubs.
When you enter a transmission line (element T) you can choose among 5 options. Simply try.

You can reach the author by sending a mail to:

                  fontana@itnvax.cineca.it (internet).

Computer site: Universita' di TRENTO, Dipartimento di Fisica 38050 POVO (TN) Italy.
Home address: FONTANA Giorgio, Via alla Formigheta, 50 38040 Martignano (TN) Italy.

If You like this program and find it useful You can send 50$ to the author and
You will actively support the development of RFC.

     Giorgio FONTANA

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