ee340 electromagnetic theory - smith chart and its applications · 2019-03-09 ·...
Post on 16-Mar-2020
9 Views
Preview:
TRANSCRIPT
EE340–Electromagnetic TheorySmith chart and its applications
Pradeep Kumar K
Department of Electrical EngineeringIndian Institute of Technology Kanpur
Pradeep (IITK) Lecture #11 1 / 9
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
Pradeep (IITK) Lecture #11 2 / 9
Smith chart
Pradeep (IITK) Lecture #11 3 / 9
Constant r -circles
Pradeep (IITK) Lecture #11 4 / 9
Constant x-circles
Pradeep (IITK) Lecture #11 5 / 9
Derivation of Smith chart
Pradeep (IITK) Lecture #11 6 / 9
Properties of constant r -circles
Pradeep (IITK) Lecture #11 7 / 9
Properties of constant x-circles
Pradeep (IITK) Lecture #11 8 / 9
Plotting impedance values on Smith chart
Pradeep (IITK) Lecture #11 9 / 9
top related