EE3113_A2009_L4

EE3113_A2009_L4 - ECE 3113 INTRODUCTION TO RF CIRCUIT...

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ECE 3113 INTRODUCTION TO RF CIRCUIT DESIGN Lecture Notes for A-term 2009 LECTURE 4 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_L4 2 Objectives • What is the difference between a lumped and distributed system? • What are the characteristics of a Transmission Line? • What sets the voltages and currents apart from low frequency lines?
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ECE3113_L4 3 General transmission line equations • Detailed analysis of a differential section Note: Analysis applies to all types of transmission lines such as coax cable, two-wire, microstrip, etc.
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ECE3113_L4 4 Kirchhoff’s laws on a microscopic level • Over a differential section we can again use basic circuit theory • Model takes into account line losses and dielectric losses • Ideal line involves only L and C
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ECE3113_L4 5 Advantages versus disadvantages of electric circuit representation • Clear intuitive
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EE3113_A2009_L4 - ECE 3113 INTRODUCTION TO RF CIRCUIT...

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