- Shunt line with smith chart manual#
- Shunt line with smith chart full#
- Shunt line with smith chart series#
Nine circles can be plotted on the Smith Chart. For example, a constant gain circle would be all the points that refer to a certain gain. Four noise parameters are entered here: magnitude and phase of the optimal source reflection coefficient (GammaOpt), the minimum noise figure (FMin), and the normalized effective noise resistance (Rn).Ĭonstant circles are a locus of points on the Smith Chart that refer to a certain value. The Noise Parameters dialog box can be opened by choosing View > N-Parameters from the Smith Chart utility window menu. S-parameters are entered as a magnitude and phase (in degrees). The Scattering Parameters dialog box can be opened by choosing View > S-Parameters from the Smith Chart utility window menu. These constant parameter circles can be used to create matching networks that solve specific design problems. For a given set of parameters, constant parameter circles can be plotted on the Smith Chart. Scattering and noise parameters are an easy way to describe the characteristics of amplifiers and other devices. Use the Interpret as Output Impedance option to specify that the value you've entered is of impedance looking out from the device (impedance you want to see). Use the Interpret as Input Impedance option to specify that the value you have entered is of impedance looking into the device (S-parameters of the measured device, for instance).
Shunt line with smith chart manual#
These options are available for three cases of source and load impedance: complex load, S-parameter file, and Manual entry. When the source or load impedance is specified as Manual Entry, the Edit button can be used to open a spreadsheet that is useful for entering frequency/impedance pairs. The complex impedance (specified as an impedance, admittance, or reflection coefficient) can be entered as a function of frequency manually. You can click the Browse button to launch a window to select the file. For details on data file format and creating these files from simulation datasets, refer to Working with Data Files in the Circuit Simulation documentation. The impedance can be specified in S, Z, or Y parameters. Any termination can be represented using a file in Touchstone, Citifile or ADS. If the true impedance varies significantly with frequency, better accuracy can be obtained by specifying the termination using an S-parameter file or manually entering the data using the spreadsheet data entry capability. This input approach is useful for narrowband matching. The impedance is interpreted as frequency independent, expressed in the form 50 + j × 10 ohms. Component values must be specified by the user.
Shunt line with smith chart series#
Choices include Resistive, Series RL, Series RC, Parallel RL, Parallel RC, Series RLC, Parallel RLC, where R = resistance, L = inductance, and C = capacitance. Network terminations can be input using lumped components networks, complex impedances, and S-parameter files. To access the Network Terminations dialog box, select Define Source/Load Network Terminations in the Smith Chart Utility window. The source and load terminations can be defined as equivalent circuits. Snaps to circles of constant reflection coefficient magnitude. Twelve components are available to be used on the Smith Chart for matching purposes. Selecting Circles > Options in the Smith Chart utility window opens the dialog box.Ĭircle colors can be changed on the Smith Chart by choosing Circles > Colors in the Smith Chart utility window. The actual circles plotted are controlled using the bottom portion of the dialog. Using the check boxes at the top of the dialog, these circles can be toggled on and off. The Smith Chart itself consists of four sets of circles of constant value: resistance (R), reactance (X), conductance (G), and susceptance (B).
Changes made in the Smith Chart Utility affect the selected SmartComponent. To view a SmartComponent, select the SmartComponent from the SmartComponent drop-down list box in the upper right corner of the utility window. Complex impedance matching is also done in this area by using any of the available passive elements. Noise circles can also be plotted in a similar manner.
Gain, VSWR, Q, and Stability circles can be plotted easily by simply entering S-parameters and then choosing the corresponding menu items.
Shunt line with smith chart full#
In this area the full functionality of a Smith Chart can be utilized. The Smith Chart Drawing Area is the central focus of the Smith Chart Utility.
0 kommentar(er)
