ECCOSORB
®
AN
Flexible Foam Sheet Broadband Microwave Absorbers
Material Characteristics
•
•
•
•
Lightweight,
flexible,
broadband,
open-cell,
polyurethane foam absorber
Carbon loaded, laminated polyurethane sheets
Frequency range from 600 MHz -40 GHz
Designed to reflect less than –17 dB of normal incident
energy above specified frequencies and relative to a
metal plate
Does not support fungal growth per MIL-STD-810E
Can be readily cut on a band saw, with scissors, die, or
a sharp knife
Availability
•
•
•
Standard sheets are 24” x 24” (61 cm x 61 cm)
Thickness depends upon the lowest desired frequency
of operation required
ECCOSORB
®
AN is available in other sizes and
customer specified configurations, incorporating miter
cuts or attachment to metal parts
Can be manufactured, on special order, on a mandrel,
to take a contoured shape.
•
•
•
Instructions for Use
•
Applications
•
•
ECCOSORB
®
AN is commonly used for the lining of
small test chambers to reduce reflections
ECCOSORB
®
AN has been used in reducing crosstalk
between adjacent antennas, shrouding antennas to
improve the antenna patterns and undesired
backlobes, as well as selective shadowing of parts of a
target for RCS measurements
Shadowing of posts and supports in anechoic
chambers, and as absorbing blankets for testing radar
systems without harm to personnel
For isolation of components or antennas by means of
insertion loss, it can be used without a metal backing
•
•
•
•
•
To obtain low reflectivity, the absorbers must be
mounted on a metal surface. If a metal surface is not
available, ECCOSORB
®
AN can be supplied metal
backed with aluminum foil (ML)
Layering of multiple pieces or slicing off part of the
thickness will degrade the overall performance
Reflectivity performance also degrades for off-normal
bistatic incidence and at different rates for different
polarizations
ECCOSORB
®
AN can be securely bonded to itself or to
other materials such as metal, wood, and common
plastic composites. The recommended adhesive is
ECCOSTOCK
®
13-111-NF.
Environmental Properties
•
ECCOSORB
®
AN is
not
waterproof and will not operate
correctly when wet.
Since there is no washout,
ECCOSORB
®
AN will function as expected after being
allowed to dry
A special CERSEAL coating to prevent moisture uptake
in high humidity to moderately wet environments is
available on special request
For waterproof applications, see ECCOSORB
®
ANW or
ECCOSORB
®
AN can be coated with CERSEAL
Typical Properties
Front Surface Color (facing oncoming EMI)
Max. Service Temperature, °F (°C)
Power Handling, W/cm
2
Thermal Conductivity, cal-cm/sec- cm
2
-°C
Fire Retardancy
White
248 (120)
0.15
6.8 x 10
-5
UL 94 HBF
•
•
Reflectivity range
(>17 dB)
AN-72
AN-73
AN-74
AN-75
AN-77
AN-79
>20 GHz
>7.5 GHz
>3.5 GHz
>2.4 GHz
>1.2 GHz
>600 MHz
Thickness
Inch (cm)
0.24 (0.6)
0.39 (1.0)
0.75 (1.9)
1.14 (2.9)
2.24 (5.7)
4.49 (11.4)
Weight
lb/piece (kg/piece)
0.6 (0.25)
1.1 (0.50)
1.5 (0.70)
1.8 (0.80)
3.3 (1.50)
6.5 (2.95)
Density
oz/in
3
(g/cm
3
)
0.06 (0.11)
0.08 (0.13)
0.06 (0.10)
0.04 (0.07)
0.04 (0.07)
0.04 (0.07)
EMERSON & CUMING MICROWAVE PRODUCTS, INC., 28 York Avenue, Randolph, MA 02368 / Telephone (781) 961-9600. Use of Information and Material: Values shown are based on testing of laboratory test specimens and represent data that
falls within normal range of the material. These values are not intended for use in establishing maximum, minimum or ranges of values for specification purposes. Any determination of the suitability of the material for any purpose
contemplated by the user and the manner of such use is the responsibility of the user. The user should determine that the material meets the needs of the user's product and use. We hope that the information given here will be helpful. It is
based on data and knowledge considered to be true and accurate and is offered for the user's consideration, investigation and verification but we do not warrant the results to be obtained. Please read all statements, recommendations or
suggestions in conjunction with our conditions of sale INCLUDING THOSE LIMITING WARRANTIES AND REMEDIES, which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or
suggestions nor do we intend them as a recommendation for any use, which would infringe any patent or copyright. Emerson & Cuming Microwave Products Inc.
Revision: 2-2-11
www.eccosorb.com
A6
Typical Reflectivity
0
-5
Reflectivity (dB)
-10
AN-72
AN-73
AN-74
-15
AN-75
AN-77
AN-79
-20
-25
-30
0.5
0.9
1.1
1.5
2
4
6
8
10
12
14
16
18
Frequency (GHz)
EMERSON & CUMING MICROWAVE PRODUCTS, INC., 28 York Avenue, Randolph, MA 02368 / Telephone (781) 961-9600. Use of Information and Material: Values shown are based on testing of laboratory test specimens and represent data that
falls within normal range of the material. These values are not intended for use in establishing maximum, minimum or ranges of values for specification purposes. Any determination of the suitability of the material for any purpose
contemplated by the user and the manner of such use is the responsibility of the user. The user should determine that the material meets the needs of the user's product and use. We hope that the information given here will be helpful. It is
based on data and knowledge considered to be true and accurate and is offered for the user's consideration, investigation and verification but we do not warrant the results to be obtained. Please read all statements, recommendations or
suggestions in conjunction with our conditions of sale INCLUDING THOSE LIMITING WARRANTIES AND REMEDIES, which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or
suggestions nor do we intend them as a recommendation for any use, which would infringe any patent or copyright. Emerson & Cuming Microwave Products Inc.
Revision: 2-2-11
www.eccosorb.com
A6
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