EE3113_A2009_L9

EE3113_A2009_L9 - 1 1 ) ( 1 ) ( 1 / ) ( ECE3113_L9 4...

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ECE 3113 INTRODUCTION TO RF CIRCUIT DESIGN Lecture Notes for A-term 2009 LECTURE 9 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_L9 2 Objectives • How does the Smith Chart encode and transform impedances? • What are the generic steps when working with the SC? • How are idealized inductors and capacitors displayed in the SC?
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ECE3113_L9 3 Impedance Transformation (Smith Chart) • Reflection coefficient in phasor form L j i r L L e j Z Z Z Z | | 0 0 0 0 0 0 0 i r i r in in j j d d jx r z Z d Z
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Unformatted text preview: 1 1 ) ( 1 ) ( 1 / ) ( ECE3113_L9 4 Generic Smith Chart computation • Normalize load impedance • find reflection coefficient • rotate reflection coefficient • record normalized input impedance • de-normalize input impedance L L z Z L z ) ( d ) ( d z in ) ( ) ( d Z d z in in ECE3113_L9 5 Graphical display ECE3113_L9 6 How to create ideal capacitors and inductors with a transmission line? Start of transformation Capacitive domain Inductive domain ECE3113_L9 7 Start of transformation...
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This note was uploaded on 10/13/2009 for the course ECE 3113 taught by Professor Ludwig during the Spring '09 term at WPI.

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EE3113_A2009_L9 - 1 1 ) ( 1 ) ( 1 / ) ( ECE3113_L9 4...

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