EE3113_A2009_L22

EE3113_A2009_L22 - ECE 3113 INTRODUCTION TO RF CIRCUIT...

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Unformatted text preview: ECE 3113 INTRODUCTION TO RF CIRCUIT DESIGN Lecture Notes for A-term 2009 LECTURE 22 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA 01609 copyright 2009, R. Ludwig Copyright, 1998 R. Ludwig ECE3113_L22 2 Objectives How are microstriplines modeled? What type of amplifier classes exist? How is the efficiency of an amplifier defined? ECE3113_L22 3 Microstrip line Matching Networks Most commonly used in RF circuits Can be used up to approximately 20 GHz (for TEM modes) Microstrip lines require typically 6 parameters dielectric constant e r PCB board height h , strip width w , thickness t resistivity r and loss tangent d ECE3113_L22 4 Key parameter designations e r , d w t h r ??? C j G L j R Z Dont use: ECE3113_L22 5 Please keep in mind, there are two issues A) phase velocity and B) characteristic impedance: eff r p c c v e e 1 / ) 4 1 8 ln( 60...
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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_L22 - ECE 3113 INTRODUCTION TO RF CIRCUIT...

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