lec15

# lec15 - scattering parameters • S-parameters are measured...

This preview shows pages 1–6. Sign up to view the full content.

EE 3113 INTRODUCTION TO RF CIRCUIT DESIGN Lecture Notes for A-term 2003 LECTURE 15 Prof. R. Ludwig Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester, MA 01609 copyright © 2003, R. Ludwig Copyright, 1998 © R. Ludwig

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
EE3113_L15 2 Scattering parameters • There is a need to establish well-defined termination conditions in order to find the network descriptions for Z , Y , h , and ABCD networks •O p e n and short voltage and current conditions are difficult to enforce • RF implies forward and backward traveling waves which can form standing waves destroying the elements
EE3113_L15 3 Solution: S-parameters • Input-output behavior of network is defined in terms of normalized power waves • Ratio of the power waves are recorded in terms of so-called

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: scattering parameters • S-parameters are measured based on properly terminated transmission lines (and not open/short circuit conditions) EE3113_L15 4 Measurements of Scattering Parameters 1 1 11 2 | = = a a b S 1 2 21 2 | = = a a b S 2 2 22 1 | = = a a b S 2 1 12 1 | = = a a b S Require proper termination at port 2 of DUT Require proper termination at port 1 of DUT EE3113_L15 5 Arrangement for measuring S-parameters • Properly terminated port 2 in order to make S 11 and S 21 measurements • Properly terminated port 1 in order to make S 22 and S 12 measurements Load impedance = line impedance input impedance = line impedance EE3113_L15 6 Example: S-parameters of T-network Port 1 measurements Port 2 measurements...
View Full Document

## This note was uploaded on 01/31/2012 for the course EE 4002 taught by Professor Scalzo during the Fall '06 term at LSU.

### Page1 / 6

lec15 - scattering parameters • S-parameters are measured...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online