System Overview


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The RFChart module, as part of SlideRule, has been designed as a basic Graphical RF design package using the Smith Chart as the basic overlay. It allows the Engineer or Student of Microwave engineering a quick and fast method of designing simple RF circuits up to and including complex circuits such as a multistage amplifier. Because of the graphical nature of this design package, the Engineer can get an intuitive feel in the design stages because of the visual presentation of displayed data. All plotted data that can be visualized on one’s monitor can also be output to a printer device as well. You can also write all plotted output as an extended metafile that can be imported into popular word processing programs such as Microsoft’s Word for Windows. This feature makes for a powerful tool in itself when it comes time to publish an article. ·
Plot
of basic Impedance Grid ·
Plot
of basic Impedance Grid plus Admittance Grid ·
Input
of Frequency for each grid ·
Input
of Characteristic Impedance for each plot ·
Undo
the last step or all steps. ·
Record
a given design session for latter play back. ·
Output
a given displayed window plot to the printer. ·
Save
a given displayed window plot as a Metafile for insertion into a document. ·
Opening
of multiple plot windows. ·
Interactive
text insertion anywhere on the plot by using the mouse and keyboard. ·
Interactive
plotting of arrows with text. ·
Interactive
plotting of straight lines. ·
Interactive
plotting of a particular VSWR circle by mouse positioning. ·
Interactive
plotting of a particular Circuit Q contour by mouse positioning. ·
Interactive
plotting of a particular Impedance Point by positioning of the mouse. ·
Interactive
plotting of an Admittance Point by positioning of the mouse on a particular
Impedance Point. ·
Interactive
plotting of the Conjugate Impedance Point by positioning of the mouse on a
particular Impedance Point. ·
Interactive
computation and plotted display of an Impedance Point along a lossless VSWR by
mouse selection from the source or load impedance point along with length of
travel and dielectric constant. ·
Interactive
impedance matching along a constant resistance or constant conductance line
along with a visual display of the current component value. ·
Interactive
microstrip matching along a constant resistance (shunt stubs) or constant VSWR
circle (series strip) along with a visual display of the current computed value
of . ·
Plotting
or locating an Impedance Point, an Admittance Point, or a Reflection
coefficient, either in Cartesian or Polar coordinates. ·
Plotting
of a Radial line from the center of the chart out past the outer circle of the
displayed Smith Chart and through the point of interest as selected by the
position of the mouse cursor. ·
The
plotting of the Stability Circles for Small Transistor Design. ·
The
plotting of the Constant Gain Circles for Power Gain (Gp), Available Gain (Gp),
S11, or S22. ·
The
plotting of Noise Circles for Small Transistor Design. ·
The
plotting of the Conjugate Match Circle (1 + j) as a rotation towards the
Generator or Load as a fraction of Lambda. ·
Small
Transistor Calculations and display from Sparameters including the Rollett
Stability Factor (K), (DEL), Maximum
Available Gain (MAG), Source and Load reflection coefficients at MAG, Gs, Go,
Gl, and Maximum Transducer Gain both for the bilateral and unilateral cases. ·
Source
Reflection calculation from Sparameters and the Load Reflection coefficient. ·
Load
Reflection calculation from Sparameters and the Source Reflection coefficient. ·
Plotting
of Constant input or output VSWR circles. ·
Calculation
and storage of Sparameters from Yparameters. ·
Microstrip
calculation (quasiTEM) of width and length from Characteristic Impedance, dielectric
constant, substrate thickness, and fraction of wavelength. ·
Microstrip
calculation (quasiTEM) of Characteristic Impedance from dielectric constant,
substrate thickness, and width of the microstrip line. · Transducer
power gain G_{T}_{, }operating
power gain G_{P}_{,
}and available power gain G_{A}_{
} from Sparameters, and Source and
Load Reflection coefficients (GammaS and
GammaL). ·
Plotting
of empirical data either on a Smith overlay or a simple polar plot.
