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© 2006 Copyright NMDG Engineering
MB100 MBBM Toolkit
Based on Maury Microwave Tuner Products
FundamentalMeasurement-Based Behavioral Modeling
in a non-50 Ohm Environment
2www.nmdg.be © 2006 Copyright NMDG
Overview
● Capabilities of the model● Supported Measurement Setups● MB100 MBBM Toolkit● Source-pull and load-pull prediction and comparison● Modulation prediction in mismatched environment● Quality of the model● Comparison● Conclusion
3www.nmdg.be © 2006 Copyright NMDG
Capabilities of the behavioral model
● Predicts input and output behavior● At the fundamental frequency● In a non-50 Ohm environment
● If pseudo-static, then correctly usable with modulation signals
a1
b1
a2
b2f 0
b1= f a1, a2b2=g a1,a2
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Supported setups
MT4463 NM100 VNAPlus
Only load-tuner required
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MB100 MBBM ToolkitMeasurements in non-50 Ohm
Calibration Tuner Deembedding
Measurement Collectionand Model Extraction
ModelVerification
Coupling in ADS
MBBM
[supported by setups]
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Model Data Collection and Extraction
DefineGammaRegion
Tuner States in amplitude and phase
ActiveState
InputPowerSweep
Progress Bar
SelectVerification data
Info onActive State
Characteristicsof MeasuredPoint
Info onActive State
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Model Verification
Measured andPredicted
B1as function ofall states (power and load)
Measured andPredicted
B2as function ofall states (power and load)
Selection of states to verify model
Complex Error
Complex Error
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Load-pull capability of model
contours basedon HB simulations
on regular polar gridusing MBBM
imported into ADS
contours basedon classical
load-pull dataimported into ADSafter triangulation
Load-pull capability and comparison with classic load-pull measurements
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Source-pull capability of model
contours basedon HB simulations
on regular polar gridusing MBBM
imported into ADS
contours basedon classical
source-pull dataimported into ADS after triangulation
Source-pull capability and comparison with classic source-pull measurements
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Modulation behavior under mismatched conditions
QPSK at input
QPSK at output
Spectral Re-growthat input
at output
Mismatched Condition
Dynamic Compression
Input Power
Out
put P
ower
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Quality of the model
● Verifiable assumptions with proper instrumentation– Impact of input harmonics can be neglected– Quasi-static (in case of modulation)
● Verifiable boundaries– Input power sweep: |a1|– Validity of mismatched area
● Ease of interpretation– Close to S-parameter interpretation - easy visualization
● Easy of extraction– Direct “proper” storage of measurements
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Model Comparison
measuring
modeling
simulation
Gt, Pav,TOI, SOI,AM2PM,...
?
ATTEMPT torecover lost info
i1 i2
v1 v2
table-basedbehavioral
model
i1 i2
v1 v2
i1 i2
v1 v2
b1 = f1 (a1, a2)
b2 = f2 (a1, a2)
BASICquantities
table-basedbehavioral
model
model100%
based onmeasurements
LOSS ofinformation
v1, i1,v2, i2
Gt
Pav
?
DERIVEDquantities
v1, i1,v2, i2
v1, i1,v2, i2
Load-Pull Based Model Proposed Modelling Approach
Pav, Gt, TOI, SOI, AM2PMand more (quality depends on )
Accurate Pav, Gt, TOI, SOI, AM2PMand more
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Conclusion
● The MBBM toolkit is used with a MT4463 or a NM100 VNAPlus with Maury Microwave tuners
● The MBBM toolkit creates a very accurate measurement-based behavioral model at the fundamental that is usable also for any modulation signal under the pseudo-static assumption
For more information http://www.nmdg.be/http://www.nmdg.be/
Download the ADS project from www.nmdg.beto experiment with the capabilities of this behavioral model