lec02

# Lec02 - = d w 2 a R L DC = ms p d f 1 = High frequency results in skin-effect whereby current flow is pushed to the outside EE3113_L2 5 How exactly

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EE3113_L2 1 EE 3113 INTRODUCTION INTO RF CIRCUIT DESIGN Lecture Notes for A-term 1999 LECTURE 2 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA Copyright, 1998 © R. Ludwig

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EE3113_L2 2 RF Behavior of Passive Components • Conventional circuit analysis – R is frequency independent – Ideal inductor: – Ideal capacitor: Evaluation – Impedance chart L j X L w = C X C w 1 =
EE3113_L2 3 Impedance Chart Z C =1/(2 π fC) Z L =2 π fL

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EE3113_L2 4 How does a wire behave at high frequency? • Example: Resistor s p 2 a l R DC = d 2 / a R R DC

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Unformatted text preview: = d w 2 / a R L DC = ms p d f 1 = High frequency results in skin-effect whereby current flow is pushed to the outside EE3113_L2 5 How exactly is the current distribution as a function of frequency? • Low frequency shows uniform current distribution • medium to high frequency pushes current to the outside • RF “sees” current completely restricted to surface EE3113_L2 6 Impedance Measurement Example Capacitor going through resonance Capacitor Characteristics EE3113_L2 7 Equivalent Circuit Analysis...
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## This note was uploaded on 01/31/2012 for the course EE 4002 taught by Professor Scalzo during the Fall '06 term at LSU.

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Lec02 - = d w 2 a R L DC = ms p d f 1 = High frequency results in skin-effect whereby current flow is pushed to the outside EE3113_L2 5 How exactly

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