EE340 Electromagnetic Theory - Smith chart and its applications · 2019-03-09 ·...
Transcript of EE340 Electromagnetic Theory - Smith chart and its applications · 2019-03-09 ·...
EE340–Electromagnetic TheorySmith chart and its applications
Pradeep Kumar K
Department of Electrical EngineeringIndian Institute of Technology Kanpur
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Smith Chart
Graphical plot of normalized resistance and reactance functions inreflection coefficient planeUseful in solving several problems; finding impedance at a pointon T-line, reflection coefficient away from load, matching networkdesign, determining VSWR etc.Best suited for lossless lines and qualitative understanding
Figure : P. H. Smith; inventor of Smith chart
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Smith chart
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Constant r -circles
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Constant x-circles
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Derivation of Smith chart
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Properties of constant r -circles
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Properties of constant x-circles
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Plotting impedance values on Smith chart
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