Retrofitting an Existing Chamber with New Absorber · Retrofitting an Existing Chamber with New...

©2018 ETS-LINDGREN©2018 ETS-LINDGREN

Retrofitting an Existing Chamber with New AbsorberCase Study

Mark [email protected] Sales Manager - EMEA

mailto:[email protected]

©2018 ETS-LINDGREN

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

2

©2018 ETS-LINDGREN

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.

3

©2018 ETS-LINDGREN

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

4

©2018 ETS-LINDGREN

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

5

©2018 ETS-LINDGREN

Existing Chamber

6

©2018 ETS-LINDGREN

Existing Chamber

7

©2018 ETS-LINDGREN

Anechoic Performance (before upgrade)

• NSA per CISPR 16-1-4, @ 10m, 30MHz – 200MHz• Tested by independent laboratory (Seibersdorf)

8

©2018 ETS-LINDGREN

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dust• Limited RF performance at low frequencies• Damaged ground plane• Reduced shielding effectiveness attenuation• Outdated illumination system• Need for upgrade!

9

©2018 ETS-LINDGREN

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!

10

©2018 ETS-LINDGREN

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

11

©2018 ETS-LINDGREN

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

12

©2018 ETS-LINDGREN

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.

13

©2018 ETS-LINDGREN

DuraSorb™ Absorbers

14

©2018 ETS-LINDGREN

Typical reflectivity

15

©2018 ETS-LINDGREN

Typical reflectivity

16

©2018 ETS-LINDGREN

Consistent Performance

17

©2018 ETS-LINDGREN

Chamber modelling of NSA prediction

18

©2018 ETS-LINDGREN

3D CAD Drawings

19

©2018 ETS-LINDGREN

3D CAD Drawings

20

©2018 ETS-LINDGREN

Pictures of completed chamber

21

©2018 ETS-LINDGREN

Final performance check• Excellent correlation to simulation data• All standards criteria are met

29

©2018 ETS-LINDGREN

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

30

Retrofitting an Existing Chamber with New Absorber · Retrofitting an Existing Chamber with New...

Documents

Transcript of Retrofitting an Existing Chamber with New Absorber · Retrofitting an Existing Chamber with New...