© 2006 Copyright NMDG Engineering

MB100 MBBM Toolkit

Based on Maury Microwave Tuner Products

FundamentalMeasurement-Based Behavioral Modeling

in a non-50 Ohm Environment

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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

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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