Revision is now 2.12
This graphics-intensive program is a transmission-line
calculator for both advanced and beginning users. Based on
the venerable Smith chart, it provides high-accuracy
computations without recourse to paper, compass or
Here are the highlights of this program:
- JJSmith is 32-bit Windows®
program written to help engineers design and analyze
networks using the Smith Chart. The standard interface
makes all of the operations in the progam easy to use.
Numerous options are available at a button press.
- Uses the full graphics capabilities
of the Windows ® operating system for network
entry, analysis controls and displayed results. The
chart can be zoomed in on or panned to closely examine
any area of special interest.
- On the Design page you can select
components for your network from the library of parts
and easily edit their values. Then on the Analysis page
you can "tune" those parts' values and immediately see
the results on the chart.
- Analyzes networks composed of
transmission lines, stubs and lumped components (L's,
C's and R's) in both series-connected and
- With revision 2.11, negative values
for inductors can be entered for impedance-matching
- The network under examination can be
stored on the hard drive for later retrieval. These
files are in ordinary text format.
- Analysis results are displayed over
impedance or admittance coordinates or over
readily-apprehended overlays of both.
- Numeric readout of any point on the
chart in terms of impedance, admittance, complex
reflection coefficient, VSWR and return loss is
available at any time with a mouse click.
- In addition to displaying the results
of sweeping the operating frequency, those results are
also available in tabular form for input to other
analysis and synthesis programs.
- As an aid to designing
impedance-matching networks, a constant-VSWR circle and
constant-Q curves may be displayed.
- The outputs to the printer are not
"screen dumps" but instead are from a separate set of
dedicated routines which write directly to the printer.
The quality of the graphics as delivered by the printer
will be limited only by that printer.
- The screens automatically adjust
themselves to various resolution screens. Aspect ratio
of the screen display can be adjusted so the Chart
looks circular on any monitor size or width-to-height
- The program requires a monitor with a
resolution of 800x600 or better.
- The program does NOT function with
computers using Japanese or Chinese-language operating