Creating a Smith Chart with load impedance only

Question

Adham Elkhouly 2023-10-14

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2033639-creating-a-smith-chart-with-load-impedance-only

回答： Sam Chak 2023-10-15

Hello,

I'm currently working on generating a Smith chart and utilizing it to determine the reflection coefficient using MATLAB. The only information I have is the load impedance (ZL). I've attempted the following code, but it doesn't work and Smithplot needs more information:

ZL = 3; % Normalized 
figure;
smithchart;
addSmithMarker(ZL, 'o', 'Load Z_L = 3\Omega');

Can someone please help?

Thank you in advance.

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Answer 1

Sam Chak 2023-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/2033639-creating-a-smith-chart-with-load-impedance-only#answer_1333459

在 MATLAB Online 中打开

Hi @Adham Elkhouly

I'm not well-versed with plotting Smith Chart. But starting R2023b, the smithplot() function replaces the smithchart() function. For details, check out the documentation at this link:

https://www.mathworks.com/help/antenna/ref/smithplot.html

amp = read(rfckt.amplifier,'default.s2p');

Sa = sparameters(amp);

Ya = yparameters(Sa);

smithplot(Ya, 2, 2)