Smith Charts

Name: Smith Charts
Price: 3.99 USD
Rating: 3.7 (3 reviews)
Author: Edoardo Orzes

Productivity

$3.99 · Designed for iPad

3 Ratings
Ages

4+
Years
Category

Productivity
Developer

Edoardo Orzes
Language

EN
English
Size

25.3
MB

Design matching networks, analyze stability, noise and power gains on the Smith chart, convert network parameters, import from touchstone. A great experience of the Smith chart. Also in dark mode. Design matching networks, insert S parameters and convert them, or import from touchstone file. Compute stability circles, equi gain and noise circles. Easy interaction with the Smith chart. This chart can easily replace a physical one, making its use much faster. Smith chart interactivity: - Works on iPhone, iPad and Mac (on Apple Silicon). - Drag and zoom in the chart. - Create multiple Smith Charts and name them. - Switch easily between input and output planes. - Use a ruler and drag it to obtain the wavelength toward generator of a point on the chart, instantly. - Tap the chart to show the coordinates in algebraic notation, you will see also magnitude and phase of that location, and the corresponding impedance. - Insert circles by hand; modify the radius dragging a circle to keep the center in place, or press to translate them and modify the radius keeping the opposite side in place. Then use the padlock button to disable interaction of gestures with circles. - You can also insert a custom circle and a segment in the input and in the output plane, defining its center and radius in a textfield. - Export to file, image or PDF Advanced tools for engineering: Matching networks: - Choose electronic components to design a matching network for your device. - Available components are: L, C, R, Z and lines (transmission line, parallel or series stub, open or shorted). - For each component it is possible to specify the parasites. - For transmission lines, it is possible to choose between Z0, K or L, C representations, and converting between the two (also for parasites). - Tapping on a component it is added to the network and the impedance seen from your device toward the matching network is shown on the smith chart. - You can create a matching network both for input and output planes of the device. - Each network has its own termination (source or load), which can be a one port device or a two ports device where you can choose a termination for the second port. - Each termination can be defined by network parameters (S, Z, Y or h) and the parameters can be imported from a touchstone file. - Components supported: Resistor, Capacitor, Inductor, General impedance (R+jX), Transmission line, Parallel stub, series Stub (both shorted or open). - Each component can be cascaded in series or in parallel, no limits of components. - You can choose a frequency for the impedance calculation and a frequency span for the plot on the Smith Chart. - For S parameters, you can specify a dedicated characteristic impedance, the tool will renormalize the Γ of that termination to be correctly shown on the Smith chart, when the smith chart is defined on a different characteristic impedance. Device analysis: - You can insert the following parameters of a device: network parameters (S, Z, Y or h), specifications (Ga, Gp, Gt, NF), noise data (gamma s optimum noise, minimum NF, rn) and the input/output reflection coefficients. - You can convert network parameters (S, Z, Y, h), and the port type (Γ, Z, Y). - While you are inserting data, you will see the computed results appearing on the chart and on the relative fields. - Results representable on the smith chart: input/output stability circles, power gain and noise circles (equiGa, Gp, Gt, NF circles), reflection coefficients towards load and source and optimum power coefficients. - Other results: obtained power gains and noise (Ga, Gp, Gt, NF) and stability (D, K, kind of stability). - You can display on the Smith chart the input impedance of your component versus frequency (as a function of load impedance) when importing a touchstone file. - For S parameters, you can specify a different characteristic impedance and the tool will automatically convert it to the one defined for the Smith chart, it will let you know the new renormalized parameters.

Ratings & Reviews

3.7

out of 5

3 Ratings

Nice try but the lines (all) appear zigzag when zooming in.
09/24/2022

Sherap6
Nice try but the lines (all) appear zigzag when zooming in (or without zooming in). Could you please try fixing this big flaw so I can start using my iPad Pro 12.9” (2018) for this application? Overall, lines don’t look good. With Kind Regards!!!

Developer Response
I really appreciated your comment. Soon an update will fix this issue. Thanks!
Nice try but the lines (all) appear zigzag when zooming in.
09/24/2022

Sherap6

Nice try but the lines (all) appear zigzag when zooming in (or without zooming in). Could you please try fixing this big flaw so I can start using my iPad Pro 12.9” (2018) for this application? Overall, lines don’t look good. With Kind Regards!!!
Developer Response 10/01/2022
I really appreciated your comment. Soon an update will fix this issue. Thanks!
nice
Aug 20

Jack_945
can you add the Y version of smith chart as well
nice
Aug 20

Jack_945

can you add the Y version of smith chart as well
Gives completely wrong impedance values
04/04/2023

mblessedmothet
I bought app specifically because the description said it would give you the specific coordinate values, including the magnitude and angle of the impedance and I wanted to get precise values instead of estimating from a paper chart. Well it does do that, but the values it gives are utter nonsense. I have no idea where it’s getting its numbers from, but they have no clear relationship to the actual coordinates on the chart. I’m very disappointed.

Developer Response
Hello, I’m sorry for this, please contact me with the email support to solve. Anyway the values you see are correct, the ones that appears on the top right corner tapping on the chart are denormalisied (multiplied by 50ohm): The ones on top are the modulo and phase, on bottom the corresponding impedance, then the values on the red dot are the Cartesian coordinates relative to the plane. Again, if that does not makes sense, please contact me. Thanks.
Gives completely wrong impedance values
04/04/2023

mblessedmothet

I bought app specifically because the description said it would give you the specific coordinate values, including the magnitude and angle of the impedance and I wanted to get precise values instead of estimating from a paper chart. Well it does do that, but the values it gives are utter nonsense. I have no idea where it’s getting its numbers from, but they have no clear relationship to the actual coordinates on the chart. I’m very disappointed.
Developer Response 04/10/2023
Hello, I’m sorry for this, please contact me with the email support to solve. Anyway the values you see are correct, the ones that appears on the top right corner tapping on the chart are denormalisied (multiplied by 50ohm): The ones on top are the modulo and phase, on bottom the corresponding impedance, then the values on the red dot are the Cartesian coordinates relative to the plane. Again, if that does not makes sense, please contact me. Thanks.

A complete redesign of the app, with tons of new features! - Matching networks design: choose among many components and see on the chart the obtained impedance - Use sliders to see how the impedance changes varying the properties of the components - Network parameters conversions (S, Z, Y, h) - Termination conversions (Γ, Z, Y) - Touchstone compatibility (one / two ports) - Export to file, image or PDF (3.0.1 bug fixes)