Slide 1
Very-Near-Field Solutions to Far-Field EMC
ProblemsEMxpertPre-Compliance EMC Testing
Advanced Embedded SystemsSeptember 09, 2015EMSCAN
CorporationVery-near-field magnetic measurements expertUnique
patented products for RF/MW and EMC/EMIPrivate Canadian corporation
since 1989Worldwide coverageRecognized innovative products
What is Very-Near-Field?Far-field is where thepattern is not
changing with the distance
Near-field is anything not in the far-field
Stay out of the reactive regionVery-near-field
3IntroductionWorld Leading Developer of Visual Real-TimeEM and
RF Pre-Compliance Test Solutions
Antenna and PCB DesignersProduct Integration and Verification
Engineers
Diagnostic ToolManufacturing Quality Control
Chambers on your DesktopEMxpertEMC diagnostic tool to rapidly
diagnose and solve EMC/EMI problems with real-time PCB emission
analysis
RFxpertAPM tool enabling to quickly evaluate performance and
optimize designs with real-time antenna performance
characterization
5FundamentalsHigh-density planar antenna array
High-speed electronic switching
Very-near-field measurements
Far-field predictions
Real-time real-fast
No chamber
Overview
PCB Radiated EMC/EMI/EMS IssuesEMC prevention an
afterthought
Little interest in EMC
EMC as a black art
Every EMI (electromagnetic interference) problem ultimately
starts or ends at an electronic circuit
Daryl Gerke and Bill Kimmel IN COMPLIANCE MAGAZINE JULY
2013Existing SolutionsChambers Slow testingComplianceHigh CAPEX
(in-house)Real-estateQualified techniciansHigh OPEX (third
party)ProbesSlow testingResolution nmSimulation softwareTime
consuming to customize per PCBExtensive training required
The Better Solution: EMxpertDirectly addresses the
challenges
Fast measurements Continuous real-timeSingle spatial scan in
seconds
Compact tabletop instrument
Cost effective solution EMxpert Family
EHX EHX+ ERX+
Technical Specifications
13FunctionalitySpectral scanProblem frequenciesReal-time
near-field spatial scanSources of radiated emissions Far-Field
predictionPre-compliance regulatory data
Frequency: 150 kHz to 8 GHzResolution: 3.75 mm to 0.1 mm
Compare and overlay functionsAutomated report generator
Modes of Operation
Spectral Scan: Scanner
16L1 Spatial Scan: Real-Time Scanner
17L1 Scan: Single-Frequency
18L2-L7 Spatial Scan: Post Capture High Res.
19Far-Field ApplicationPredict radiated EMI of PCB 30 MHz 6
GHzCompensated EMxpert very-near-field dataPCB structure and design
models
Absorber mat
Applications
21Real-TimeIntermittent peaksSourcePathDistribution
Functional modeHighest emission
22A/B ComparisonObsolescence managementProduction unit versus
gold standardFault diagnosis
23Immunity InsightsInjected signal path
Component susceptibility
Effects on functionality
24Common ModeHow signals couple onto connectors creating common
mode problems
25Effectiveness of Filters
26Effectiveness of Shielding
27Pre-ComplianceFar-field measurements in a virtual
chamberFar-field prediction FCC, ANSI, CISPR and user-defined limit
lines
Conclusion
AdvantagesReal-time view of emission sources and
distribution
Continuous peak hold scan for spurious events
Worlds fastest high-resolution testing
Worlds fastest pre-compliance data
Low acquisition costBenefitsImproved TTM and R&D
productivityTest time reduction > 100 x Rapid design iteration,
prototyping & optimization Reduced chamber costsDelayed
investment in new chambersThird party test expenses
Cost effective preparation to compliance
31Some Customers
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