retrofitting an existing chamber with new absorber · retrofitting an existing chamber with new...
TRANSCRIPT
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©2018 ETS-LINDGREN©2018 ETS-LINDGREN
Retrofitting an Existing Chamber with New AbsorberCase Study
Mark [email protected] Sales Manager - EMEA
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Outline• UTAC & ETS-Lindgren overview• Overview of existing EMC anechoic chamber• UTAC requirements and goals • DuraSorb™ novel absorbers solution• Pictures following project completion• Final performances validation • Conclusion
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Customer - UTAC• Paris, France• Major technical partner for the Automotive industry• Consulting, Testing & Certification services• ISO17025 Test facilities to support Automotive R&D:
• EMC, environmental, climatic, vibration, proving grounds, reliability, endurance, etc.
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ETS-Lindgren• Supplier of Turnkey EMC Solutions• Manufacturing shielding, absorbers, antennas, amplifiers,
instrumentation, etc.• Headquartered in Austin, Texas, with manufacturing facilities
and offices worldwide. • Active contributor to Automotive EMC community globally
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Overview of existing UTAC chamber• Originally installed in 1993• EMC on vehicles (cars, buses, trucks, tractors)• Welded steel enclosure L x W x H = 23m x 14m x 9m• Double door W x H = 4m x 4m• Lined with 1.8m twisted pyramidal foam absorbers • 9m turntable with built-in car dynamometer• Second fixed truck dynamometer• Suspended E/H generator for immunity tests
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©2018 ETS-LINDGREN
Existing Chamber
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Existing Chamber
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Anechoic Performance (before upgrade)
• NSA per CISPR 16-1-4, @ 10m, 30MHz – 200MHz• Tested by independent laboratory (Seibersdorf)
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Summary of pre-upgrade situation• Ageing, old-fashion type absorbers• Wear and tear, carbon dust• Limited RF performance at low frequencies• Damaged ground plane• Reduced shielding effectiveness attenuation• Outdated illumination system• Need for upgrade!
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UTAC Requirements & Goals• Improve the performances for automotive testing
• CISPR 12, CISPR 25, ISO 11451-2
• Increase the chamber capabilities• Add compliance commercial testing capability
• CISPR 16, IEC 61000-4-3• 10m chamber with 9m turntable is unique in the region!
• Add compliance Military / Avionics testing capability • MIL-STD-461, DO-160
• Improve image, operators comfort and work conditions• Achieve the above minimizing downtime of the facility to
just 4 weeks!
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Overview of ETS-Lindgren Solution• Old absorbers removal and proper disposal / recycling• New internal support construction for ferrite loading • Full lining with ferrite tiles and DuraSorb™ DSH-600• New illumination system (metal-halide projectors)• General shield maintenance• Ground plane upgrade• Independent chamber performance characterization
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DuraSorb™ Absorbers• Volumetrically Loaded Polystyrene Substrate• The polystyrene beads are 100% and uniformly coated• Homogeneous coating process result in performance
uniformity throughout production batches• Broadband performances 30MHz – 40GHz
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DuraSorb™ Absorbers• Closed cell structure - moisture and water resistant• Rigid and stable in dimension - easy to install (modular)
• Base plate installed over ferrite• Cones individually plug in• End caps interlock providing protection and improved ambient lighting
• Easy to replace if a cone gets damaged• Long life span • Uniform look, rigid and no droop• Environmentally friendly fire retardants. DuraSorb™ meets
UL94 HBF, and DIN4102 B2.
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DuraSorb™ Absorbers
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Typical reflectivity
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Typical reflectivity
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Consistent Performance
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Chamber modelling of NSA prediction
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3D CAD Drawings
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3D CAD Drawings
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Pictures of completed chamber
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Pictures of completed chamber
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Pictures of completed chamber
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Pictures of completed chamber
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Pictures of completed chamber
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Pictures of completed chamber
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Pictures of completed chamber
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Before and after….
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Final performance check• Excellent correlation to simulation data• All standards criteria are met
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Key takeaways• Challenging project scope and timescales • Excellent NSA performance and final aesthetics• Lots of 10m chambers from 90’s in need of similar upgrade• DuraSorb™ absorber is an efficient solution:
• Broadband RF performances – 30MHz – 40GHz• Consistent and uniform• Lightweight, easy installation and replacement• Robust• Long lifespan
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Thank you for your attention!
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