ETS-Lindgren's DuraSorb DSH-750H Absorber is the latest evolution of ETS-Lindgren's volumetrically loaded polystyrene absorber technology. It combines the advantages of the proven polyurethane based absorber performance with the physical properties of the polystyrene absorbers. DuraSorb is constructed using substrates with rigid, closed cell foams, which are loaded volumetrically and uniformly throughout the absorbers. DSH-750H is ideal for antenna measurements and military standards testing.

Key Product Information


​Frequency Range

The DSH-750H provides a superior performance from 80 MHz to microwave frequencies. As a result of its optimized design, high performance is guaranteed, both at lower frequency bands and frequencies above 1 GHz.

Durable Construction Designed for Precision Installation

DuraSorb is manufactured by injecting uniformly loaded lossy materials in predetermined geometric shapes to produce the desired performance. After the lightweight substrates have been molded, they are shipped disassembled to job-sites for reduced shipping volume. Easily assembled at the site, finished absorbers are pressed and glued into a lightweight polystyrene universal mounting base on the walls and ceiling of the chamber. This method assures absorber rows are aligned with geometric precision.

Non-Hygroscopic Fire Resistant

DuraSorb is intrinsically non-hygroscopic due to its closed cell design. Furthermore, DuraSorb is engineered to have outstanding fire resistance. The material is treated additionally with environmentally friendly fire retardants beyond what is normally required for construction grade foams. DuraSorb material has been tested to meet the requirements of UL94 HBF and DIN 4102 B2.

RF Exposure Test Time Limits

Frequency Range: 80 MHz – 1 GHz

    • 600 v/m
    • 3 minute CW
    • After 3 minutes, no RF power in the chamber for 15 minutes
    • This can be done for 10 cycles and then the chamber must have no RF power for 1 hour to allow for the absorber to get down to ambient temperature again. 

Frequency Range: 1 GHz – 40 GHz

    • 600 v/m
    • 3 minute CW
    • After 3 minutes, no RF power in the chamber for 10 minutes
    • This can be done for 10 cycles and then the chamber must have no RF power for 1 hour to allow for the absorber to get down to ambient temperature again.

DSH-750H Typical Data

Frequency                    Reflectivity

80 MHz                         < -6 dB

120 MHz                       < -8 dB

200 MHz                       < -20 dB

300 MHz                       < -25 dB

500 MHz                       < -35 dB

1 to 2 GHz L-Band         < -45 dB

2 to 4 GHz S-Band        < -45 dB

4 to 8 GHz C-Band        < -50 dB

8 to 12 GHz X-Band      < -50 dB

18 to 40 GHz K-Band    < -50 dB

Specifications Select a tab below for more information



​Frequency                   

  • 80 MHz to 40 GHz

Power Handling            

  • 250 V/m CW Incident Plane Wave*
  • 600 V/m CW for 5 Minutes with at least 10 Minutes Cool Down Period*

*All Under Ambient Temperature of 25o C (77o F)

​Height                           75.0 cm (29.5 in)

View BIM Models of our Product Options Below:

 

 

Key Features


  • 80 MHz to 40 GHz Frequency Range
  • Durable Construction, Precision Installation Design
  • Non-Hygroscopic Substrate

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Date Last Updated: Friday, November 6, 2020
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