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12th June 2019, 15:41 #1
Drawing simple Data in Smith ADS smith Chart
Hi
I want to plot simple array of data in ADS smith Chart ( On display page , I\m not talking about ADS smith Chart utility).
Consider my load to be an array :
loads= [ 0.1::0.1::3]
My desired chart which is presented in one of keysight's tutorials must be like :
But I get this:
I know that I'm missing an important concept including normalizing and characteristic Impedance.
Thanks for your time!

12th June 2019, 16:15 #2
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Re: Drawing simple Data in Smith ADS smith Chart
Smith chart is a plane of reflection coefficient not impedance.
So you have to plot Gamma not Zload.
Zload=[0.1::0.1::3]
Gamma=(Zload50)/(Zload+50)

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12th June 2019, 22:27 #3
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14th June 2019, 09:43 #4

14th June 2019, 10:21 #5
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Re: Drawing simple Data in Smith ADS smith Chart
Simply any complex value.
Assume complex value, aho=boke+j*kasu.
Plot aho.
Plotted data is located at horizontal=boke and veritical=kasu.
That’s all.
What do you want to mean ?
I assumed your Zload is unnormalized, so I calculated Gamma with Rref=50.
If Zload is normalized, Gamma is (Zload1)/(Zload+1).
Surely learn very basic things.Last edited by pancho_hideboo; 14th June 2019 at 10:44.

15th June 2019, 07:29 #6
Re: Drawing simple Data in Smith ADS smith Chart
Unfortunately it is not simply drawing any complex value that we are introducing as input! try it once.
I've figured it out.
It is true that smith chart is the ref coefs ( reflection coefficients) and smith chart in ADS will assume any input value as ref coef AND " will draw the normalized Impedance that will result in the input ref coef ".
My mistake was that I expect it to draw the exact input value on the chart. I really was and am missing basic concepts.
Thank you for your time friend.

15th June 2019, 11:29 #7
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Re: Drawing simple Data in Smith ADS smith Chart
Last edited by pancho_hideboo; 15th June 2019 at 10:55.

15th June 2019, 12:13 #8
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Re: Drawing simple Data in Smith ADS smith Chart
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16th June 2019, 03:13 #9
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Re: Drawing simple Data in Smith ADS smith Chart
Very Very Wrong.
ADS does not draw the normalized impedance.
Surely learn very basic things.
Rather ADS draws any complex value, aho simply.
Marker shows values, (1+aho)/(1aho) from plotted any complex value, aho.
If you plot any complex value as reflection coefficient and place marker on it, marker calculates and shows impedance value from reflection coefficient.
That’s all.
Your misunderstandings resembles to the following.
https://www.edaboard.com/showthread.php?383512Last edited by pancho_hideboo; 16th June 2019 at 03:01.

16th June 2019, 07:00 #10
Re: Drawing simple Data in Smith ADS smith Chart
what your said is exactly what I said !
you'r just naming normalized Impedance aho!
Surely you are yourself stuck with it a little. Every complex concept consist of very simple things.
It's correct what I just said. let's give it a try!
assume we have a Impedance: Z = 50 + j50
our characteristic Impedance is : Z0= 50
our normalized Impedance gonna be z= 1 + j
then we can have our ref coef = (z1)/(z+1) = 0.2 + j 0.4
simply we give this to ADS and it shows us its corresponding normalized impedance.
I think you've just confused your self with your new names :)

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16th June 2019, 08:29 #11
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Re: Drawing simple Data in Smith ADS smith Chart
Very Very Wrong.
It is reflection coefficient not impedance.
z=(1+Γ)/(1Γ), Γ=(z1)/(z+1)
ADS plot any complex value, aho(=Γ), marker calculates and shows z.
Simply you can not understand basic things including Smith chart correctly.
Plotted data is a reflection coefficient, Γ not impedance, z.
Surely learn very basic things.Last edited by pancho_hideboo; 16th June 2019 at 08:39.

16th June 2019, 09:05 #12
Re: Drawing simple Data in Smith ADS smith Chart
Please Give it a try, And see. You are Wrong about what ADS is doing. I've Showed it exactly on the picture, Impedance is obviously visible on the chart, forget about the marker, I
TAKE A LOOK AT IT exactly! :) I've upload it with a better resolution
If you are not agree please show it on a ADS smith chart AND Not simply speaking and taking time. thanks!

16th June 2019, 09:47 #13
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16th June 2019, 10:04 #14
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Re: Drawing simple Data in Smith ADS smith Chart
Last edited by pancho_hideboo; 16th June 2019 at 10:15.

16th June 2019, 10:22 #15
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Re: Drawing simple Data in Smith ADS smith Chart
Do you understand normalized impedance? When Smith chart is teached at universities, you learn about the normalized impedance/admittance grid on the chart. There is no need for "marker calculation", just properly read the Smith chart.
https://en.wikipedia.org/wiki/Smith_..._chart_gen.svg
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16th June 2019, 10:27 #16
Re: Drawing simple Data in Smith ADS smith Chart
Z= 50 + j50
Z0= 50
normalized Impedance (z)= 1+j1
Gamma = (z1)/(z+1) = 0.2 + j0.4
LOOK!
It's Obvious that Smith chart is not drawing the complex input it self! So what is it drawing?! Reclection coefficient
? no! see :)

16th June 2019, 10:31 #17

16th June 2019, 11:49 #18
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16th June 2019, 12:43 #19
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Re: Drawing simple Data in Smith ADS smith Chart
Smith Chart is a Graphical Representation of Complex Quantities so every kind of Complex Quantities can be read such as Impedance,Admittance,Reflection Coefficients,sparameters etc.

17th June 2019, 18:55 #20
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Re: Drawing simple Data in Smith ADS smith Chart
However this thread's issue is software implementation.
See attached figure.
Very fortunately it is simply drawing any complex value aho.
boke=(1+aho)/(1aho)
Marker calculates and shows boke.
Horizontal axis corresponds to real(aho).
Vertical axis corresponds to imag(aho).
Full circles correspond to real(boke).
Partial circles correspond to imag(boke).
However ADS draws aho not boke.
ADS don't care whatever aho is.
If you identify aho as reflection coefficient Γ, boke is normalized impedance z.
Relation between aho and boke is bilinear transformation.
aho=(boke1)/(boke+1), boke=(1+aho)/(1aho)
Such relation is not limited to Γ and z.
Polarization chart also utilizes this relation.
https://www.edaboard.com/showthread.php?371150
Wrong.
ADS surely draws the exact input value on the chart simply.
I'm correct.
You are wrong.
Simply you can not understand both ADS and Smith Chart.
Wrong.
ADS simply draws the complex input it self.
Your misunderstandings resembles to the following.
https://www.edaboard.com/showthread.php?383512Last edited by pancho_hideboo; 17th June 2019 at 19:10.

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