EE3113_A2009_L26

EE3113_A2009_L26 - 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 26 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA 01609 copyright © 2009, R. Ludwig Copyright, 1998 © R. Ludwig ECE3113_L26 2 Objectives • How do you assign the gain budget to the input and output matching networks? • What is the constant gain analysis? • What are the detailed steps in the design of the matching network? ECE3113_L26 3 RF Amplifier Design Project • Amplifier design – passive bias network – stability analysis of BJT (k-factor) – no feed-back (S 12 =0) -> unilateral design – class A (low-efficiency) BJT configuration – S-parameter description (given bias, frequency) – discrete, two-element matching networks ECE3113_L26 4 Results of constant gain analysis 0.2 0.5 1.0 2.0 5.0 +0.2-0.2 +0.5-0.5 +1.0-1.0 +2.0-2.0 +5.0-5.0 0.0 ¥-1dB 0dB 0.2dB G S opt =S 11 * 0.2 0.5 1.0 2.0 5.0 +0.2-0.2 +0.5-0.5 +1.0-1.0 +2.0-2.0 +5.0-5.0 0.0 ¥-1dB 0dB 0.5dB G L opt =S 22 * Input gain circles Output gain circles ECE3113_L26...
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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_L26 - ECE 3113 INTRODUCTION TO RF CIRCUIT...

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