ORBIT FR Tuned Frequency Absorbers - AET-20 - Manual (Page 2)

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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 ec-
ted 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
• 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 2 Dependent upon frequency
i.e. X-band = 0.16 lb/sq. ft.
AET-20 mechanical drawing
0.172’
’
24’
’ 24’
’
US government customers:
Save time by ordering this product using
our National Stock Number - NSN 6625-00-790-0232