EE3113_A2009_L10

EE3113_A2009_L10 - ( 1 1 d e d e d d z Y Y y j j in in in...

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ECE 3113 INTRODUCTION TO RF CIRCUIT DESIGN Lecture Notes for A-term 2009 LECTURE 10 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA 01609 copyright © 2009, R. Ludwig Copyright, 1998 © R. Ludwig
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ECE3113_L10 2 Objectives • How is the Smith Chart adjusted to display admittances? • What is the ZY-Chart? • How do you read off admittances and corresponding impedances for the same reflection coefficient?
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ECE3113_L10 3 Admittance Transformation (Smith Chart) • impedance representation in Smith Chart 0 ) ( 1 ) ( 1 d d jx r z in • admittance representation in Smith Chart ) ( 1 ) ( 1 ) ( 1 )
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Unformatted text preview: ( 1 1 d e d e d d z Y Y y j j in in in 180 degree phase shift ECE3113_L10 4 Transformation 2 1 2 1 1 1 j y j z in in ECE3113_L10 5 Alternative: re-interpretation Instead of rotating the reflection coefficient about 180 degree, we keep the location fixed and rotate the entire Smith Chart by 180 degree.---ECE3113_L10 6 Re-interpretation leads to ZY-Smith Chart The Smith Chart in its original form is kept for impedance display, but a second Smith Chart is rotated by 180 degree for admittance display....
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EE3113_A2009_L10 - ( 1 1 d e d e d d z Y Y y j j in in in...

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