ORBIT FR AET-20 User Manual
>
Tuned Frequency Absorbers - AET-20
AET-20
> Applications:
• Lining radar nacelles (particularly where high power
is present)
> Key features:
• Lightweight material reaching 20 dB attenuation
or better at tuned frequency
> Shape:
• Flat
> Frequency band:
• Refl ectivity: from 20 dB @ 10 GHz
> Standard base size:
• 2’ x 2’ (60.96 cm x 60.96 cm)
Specialty Absorbers
> Height:
• Dependent upon frequency, i.e. X-band = 0.172’’
Nominal
> Operating conditions:
• Temperature: -22º F to +158º F (-30º C to +70º C)
> Indoor/outdoor:
• Indoor and Outdoor
> Related certifi cations:
• NRL 8093 – 1, 2, 3
> Ordering code:
• AET-20
3939
1/ Description
Tuned Frequency RF absorber is a lightweight material
utilizing a dielectric core. Through the use of a phase
cancellation principle, attenuation equal to or greater
than 20 dB at the design frequency can be achieved.
The method of construction is a lamination of the
following components:
• Conductive Front Layer
• Polyethylene Core
• Refl ective Back Layer
The components are laminated such that the refl ected wave coming off the back of the material is out of
phase when it arrives at the front through the dielectric.
Therefore, it has a canceling effect with the transmitted
wavelength at the face of the material, thereby reducing
its refl ectivity.
2/ Typical properties
AET-20 mechanical drawing
0.172’’
24’’
24’’
• Resistance to fuel, oil, & solvents - Good
• Self-supporting - Good
• Abrasion resistance - Fair
• Flexural capacity - Poor
3/ Specifi cations
AET-20
Base Laminate of fi berglass cloth with
a polyethylene foam spacer and
an aluminum foil refl ector.
Height in Dependent upon frequency
i.e. X-band = 0.172’’ Nom.
Absorption @ dB 20 dB at design frequency
Normal Incidence
Power 3.0 Watts/Sq. In. @ 23°C C.W.
Weight lbs/ft
i.e. X-band = 0.16 lb/sq. ft.
2
Dependent upon frequency
US government customers:
Save time by ordering this product using
our National Stock Number - NSN 6625-00-790-0232
40
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