Fixture Measurements
If you can't read please download the document
date post
02-Jan-2016Category
Documents
view
22download
3
Embed Size (px)
description
Fixture Measurements. Doug Rytting. Agenda. Agilent Network Analysis Applying the 8510 TRL Calibration for Non-Coaxial Measurements Product Note 8510-8A Agilent De-embedding and Embedding S-Parameter Networks Using a Vector Network Analyzer Product Note 8510-8A - PowerPoint PPT Presentation
Transcript of Fixture Measurements
Fixture MeasurementsDoug Rytting
Page
AgendaAgilent Network Analysis Applying the 8510 TRL Calibration for Non-Coaxial MeasurementsProduct Note 8510-8AAgilent De-embedding and Embedding S-Parameter Networks Using a Vector Network AnalyzerProduct Note 8510-8AIn-Fixture Measurements Using Vector Network AnalyzersAgilent AN 1287-9OtherAsymmetrical Reciprocal OptimizationTwo-Tier Calibration and Simplified Error Models
Page
Content of Application NoteTRL Calibration in FixtureTRL Calibration on PC Board
Page
Microstrip Test Fixture
Page
Microstrip DUT in Fixture
Page
Calibration Model
Page
TRL Calibration Process
Page
TRL Calibration Process Steps
Page
Calibration Comparison
Page
Calibration Comparison
Page
PC Board TRL Calibration
Page
PC Board vs Fixture
Page
Time Domain of Launch and DUT
Page
AgendaAgilent Network Analysis Applying the 8510 TRL Calibration for Non-Coaxial MeasurementsProduct Note 8510-8AAgilent De-embedding and Embedding S-Parameter Networks Using a Vector Network AnalyzerProduct Note 8510-8AIn-Fixture Measurements Using Vector Network AnalyzersAgilent AN 1287-9OtherAsymmetrical Reciprocal OptimizationTwo-Tier Calibration and Simplified Error Models
Page
Content of Application NoteDe-embed ProcessDe-embed using ADS models
Page
Text Fixture
Page
Fixture Model
Page
Definition of T-Parameters
Page
S-Parameters and T-Parameters
Page
Combine Fixture and NA ModelsCombing a Two-Tier Calibration
Page
Definition of Error Terms
Page
Definition of Error Terms
Page
Fixture Model Using:Lossy Transmission Lines
Page
Model of Coax to Microstrip Transition
Page
Complete ADS Model of Test Fixture
Page
Measured vs Modeled FixtureOptimize until Modeled Matches Measured
Page
S11: De-embedded vs Coax CalibrationSurface Mount Amplifier
Page
S21: De-embedded vs Coax CalibrationSurface Mount Amplifier
Page
AgendaAgilent Network Analysis Applying the 8510 TRL Calibration for Non-Coaxial MeasurementsProduct Note 8510-8AAgilent De-embedding and Embedding S-Parameter Networks Using a Vector Network AnalyzerProduct Note 8510-8AIn-Fixture Measurements Using Vector Network AnalyzersAgilent AN 1287-9OtherAsymmetrical Reciprocal OptimizationTwo-Tier Calibration and Simplified Error Models
Page
Content of Application NotePractical Considerations for Fixture Calibrations.Time Domain Used to Reduce Errors.
Page
Typical R&D Fixture
Page
Direct Measurement Using Calibration
Page
Two-Port Calibration
Page
Determining Open Capacitance
Page
Load Standard
Page
Thru Standard
Page
TDR Basics
Page
TDR Basics
Page
GatingThe gating may include the launches by mistake.
Page
Optimizing Load
Page
Connectors on Fixtures
Page
Connector Performance
Page
AgendaAgilent Network Analysis Applying the 8510 TRL Calibration for Non-Coaxial MeasurementsProduct Note 8510-8AAgilent De-embedding and Embedding S-Parameter Networks Using a Vector Network AnalyzerProduct Note 8510-8AIn-Fixture Measurements Using Vector Network AnalyzersAgilent AN 1287-9OtherAsymmetrical Reciprocal OptimizationTwo-Tier CalibrationSimplified Error Models
Page
Asymmetrical Reciprocal OptimizationA passive asymmetrical reciprocal device is used in addition to short, open, load, and thru standards.The errors in calibration kit parameters can be reduced through numerical optimization to minimize asymmetry after correction. There are some potential convergence issues.
Page
Asymmetrical Device
Page
Before and After Optimization
Page
Transmission Line Optimized CalibrationMeasure S21m of a long transmission line.Calculate S11c=S21mS21m of the transmission line.Measure S11m of the transmission line with short connected to the end.Subtract S11c from S11m for comparison.Adjust capacitance of open to minimize ripple.Adjust inductance of load and short to match the calculated S11c and measured S11m of the transmission line.
If possible, connect the load on the end of the long transmission line and adjust inductance of the load model for best performance. Then adjust the open and short models using a short connected to the end of the long transmission line.
Page
Transmission Line Optimized Calibration
Coax example using a 10 cm verification airline with a short on the end.Before and after optimizing the calibration standards models.
Same approach can be used for fixture and on wafer measurementsusing a long verification transmission line.
Page
Two-Tier CalibrationFirst tier calibration stored in network analyzer.Second tier calibration performed with first tier calibration turned on.First tier could be SOLT and second tier TRL. This method enables TRL calibration on a 3 receiver NA.First tier could be at coax port of NA and second tier at ports of a fixture This process will characterize the fixture.
Page
Simplified Error Model for FixtureUsing Two-Tier TechniqueAllows simpler second tier calibrations since number of error terms reduced from 7 to 6 due to reciprocity of the fixture.For example, SOLT can be simplified to SOL since no thru is required.Once fixture is characterized the data can be stored and used in future calibrations. Many other simplified fixture calibrations are available.
Page
