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Which chart is used for calculations of transmission lines?

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Which chart is used for calculations of transmission lines?

(a) Andre chart

(b) Smith chart

(c) Wilson chart

(d) Federer chart

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This intriguing question originated from Generation of AM Using Amplifiers topic in chapter Amplitude Modulation of Analog Communications

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Right option is (b) Smith chart

To explain: Smith chart is highly used in radio frequency engineering. Because it is highly useful in solving problems related with transmission lines and matching circuits. It is highly useful for displaying multiple parameters like impedance, admittance etc simultaneously.

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