Les absorbants pour chambres anéchoïque

Les absorbants

 
 
 
  

- COMTEST proposent des solutions réellement innovantes pour les absorbants en polystyrène pour les applications en CEM et des installations d'essai de micro-ondes.
Tous nos absorbants sont des solutions en polystyrène et adaptées aux ondes pour toutes sortes de chambres anéchoïques. La gamme des produits se composent de deux hybrides ( CEM ) et d'absorbants micro-ondes (haut fréquences).

Son argument majeur est son absence de toxiques chimiques ignifugés. Ces absorbants sont durables et 100 % respectueux de l'environnement. En conséquence, les absorbants sont entièrement conformes à la directive REACH et ROHS.

Avantages des absorbants de micro-ondes en polystyrène :
• La conception unique et améliorée du produit :
• conception alternatif conique ( vertical - horizontal ) résultant en une amélioration des performances de réflectivité .
• Léger
• entièrement et facilement amovibles
• Conforme aux spécifications salle blanche. classe 10.000 / ISO14644 - 1 classe 4
• résultats cellule de carbone de chargement uniformes dans une performance plus stable.
• La rigidité et une résistance supérieure à la traction (pas de flèches tombantes )
• produit Supérieur en durée de vie à se qui existe habituellement (> 40 ans)
• Résilience à l'humidité.

 

Hybrid absorbers for EMC test facilities

The hybrid polystyrene absorber range is designed for typical chamber solutions such as 3, 5 and 10m semi or full anechoic chambers, compact rooms and automotive test chambers. The hybrid absorber is a high performance, ultra wide band, carbon loaded polystyrene absorber with an operating frequency from 26MHz to 110GHz. The HT hybrid absorbers are tuned for perfect performance over ferrite tiles in EMC test facilities.

The HT series consist of three different models:

•    HT25 (10”)
•    HT45 (18”)
•    HT65 (26”)

All absorbers consist of a single base plate and separate tapers. The absorber base dimensions are 1200*600mm.
Upon customer request the hybrid absorbers can be equipped with white end caps.

Specifications of the hybrid absorber range:

Material:
Dimensions:
Weight:
Color:
Humidity resistance:
Product life time:
Power Handling:
Frequency range:
Fire retardancy:
Clean room spec.:
White end cap:
Reach compliant:
ROHS compliant:
Closed-cell polystyrene
1200*600*450mm (height)*
5,7 Kg / m2*
Dark Grey
No deterioration from moisture
 >40 years
434 V/m
26MHz – 110GHz
ISO 11925-2 class E / DIN 4102 class B2 / NRL 8093 test 1,2,3
Class 10.000 / ISO14644-1 class 4
Upon request, 2 square caps per absober
Yes
Yes

*: HT45.

*The typical performance is based on the cascade solution in combination with the FT106.

Field Uniformity (FU) test floor set up

The HT45 absorber is also suited for field uniformity floor set up configurations according to the IEC/EN-61000-4-3 standard in (semi) anechoic chambers used for EMC testing. To protect the absorber tips whilst stacking the HT45 can be equipped with a grey end cap (ECT45-G).

Wideband Ferrite Floor Absorber model 1701-000.

The wideband ferrite floor absorber model 1701-000 is designed to facilitate the use of all semi anechoic chambers for full compliance immunity testing. In combination with the hybrid absorber model HT45 the ferrite floor absorber is perfectly suited for a floor setup for Field Uniformity (FU) testing according to IEC/EN-61000-4-3. Dimensions: 602*602*20mm / weight: 17kg.

  

Hybrid Ferrite Tile model 1701-200

The EMC hybrid ferrite tile model 1701-200 is a sintered ferrite tile and delivers excellent electromagnetic absorption performance from 26MHz ~1GHz. Due to thin design of ferrite tiles the total volume of absorbers installed in a (semi) anechoic chamber is greatly reduced. The ferrite tile can be directly glued to the shielding enclosure or screwed to an inner structure which enables easy installation. Ferrite absorbers are also suited for hybrid (cascade) solutions in combination with the EMC hybrid polystyrene absorbers (HT series).

 

Microwave absorbers for antenna test chamber applications

The MT microwave absorber range consist of high performance, broad band, carbon loaded polystyrene absorbers with an operating frequency from 70MHz to 110GHz. Due to the excellent performance at microwave frequencies the MT series is designed for Antenna Pattern Measurement (APM), (compact) Antenna Test Range (ATR) Radar Cross Section (RCS), and free space testing anechoic chamber applications.

The MT series consist of three different models:

•    MT25 (10”)
•    MT45 (18”)
•    MT65 (26”)

All absorbers consist of a single base plate and separate tapers. The absorber base dimensions are 1200*600mm. Upon customer request the microwave absorbers can be equipped with white end caps.

Specifications of the microwave absorbers:

Material:
Dimensions:
Weight:
Color:
Humidity resistance:
Product life time:
Power Handling:
Frequency range:
Max operating temp.:
Fire retardancy:
Clean room class:
White end cap:
Reach compliant:
ROHS compliant:
Closed-cell polystyrene
1200*600*450mm (height)*
7,36 Kg / m2*
Dark Grey
No deterioration from moisture
>40 years
1500 W/m2
70MHz – 110GHz
70 oC.
ISO 11925-2 class E / DIN 4102 class B2 / NRL 8093 test 1,2,3
Class 10.000 / ISO14644-1 class 4
Upon request, 2 square caps per absorber
Yes
Yes

 *: MT45.

 

Microwave absorbers for CISPR 25 and Mil STD test chamber applications

The MT65 is also suited for typical chamber solutions such as MIL STD or Tempest test chambers and CISPR-25 chambers.

sVSWR floor set up

The MT25 absorber is also suited for sVSWR floor set up configurations according for CISPR 16-1-4 testing in (semi) anechoic chambers used for EMC testing.  The MT25 consist of a single base plate and 128 tapers. The absorber dimensions are 120*60*25cm (h).  To protect the absorber tips whilst stacking the MT25 can be equipped with a grey end cap (ECT-25-G).