Low Cost, Compact Microwave Reflectometer for NonDestructive Testing

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Low Cost, Compact Microwave Reflectometer for NonDestructive Testing

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Determine the procedure of operating the oscilloscope through remote access. Implement oscilloscope readings into MATLAB code. Stream-line code. Future Work ... – PowerPoint PPT presentation

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Title: Low Cost, Compact Microwave Reflectometer for NonDestructive Testing

1
Low Cost, Compact Microwave Reflectometer for
Non-Destructive Testing

Matthew Rangen and Keith Bruno
March 3, 2005
Bradley University
Department of Electrical and Computer Engineering

2
Overview

Objective
Background
Block Diagram
Tasks Schedule
Current Results
MATLAB
Network Analyzer
Future Work

3
Objective
The objective of the project is to determine the
reflection coefficient of an unknown load by the
use of a six-port network analyzer integrated
with a workstation.
4
Background
The reflection coefficient can be found by
knowing a reference signal and sampling selected
power outputs in a micro-strip circuit. With
these known quantities and using a specific
algorithm, the reflection coefficient can be
calculated.
5
Detailed Block Diagram
6
Tasks Schedule(previous)
7
MATLAB Work
Overall Calibration Flowchart
8
Calibration Work
Calibration Flow Equations
9
Calibration Work
Calibration Flow Equations Part 2
10
Calibration Work
Calibration Flow Equations Part 3
11
MATLAB Work
Measure Flowchart
12
Measurement Work
Measurement Equations
13
6-Port Network Analyzer
14
90 Hybrid

Input Port
Output Port
90 phase-shift difference
Isolated Port
Output Port
15
90 Hybrid
16
90 Hybrid Results
17
90 Hybrid Results
18
Lange Coupler
Through Port
Isolated Port
Coupled Port
Input Port
19
Lange Coupler
20
Lange Coupler Results
21
Future Work