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Microwave Absorber Selection Guide Microwave Absorber
Selection Guide
RANTEC MICROWAVE ABSORBER
Information presented is subject to change as product enhancements are made. Contact the ETS-Lindgren Sales Department for current specifications.
www.ets-lindgren.com
5/03 2 k W � 2003 ETS-Lindgren. REV B
RANTEC MICROWAVE ABSORBER
USA
1301 Arrow Point Drive
Cedar Park, Texas 78613
+1.512.531.6400 Phone
+1.512.531.6500 Fax
info@ets-lindgren.com
Finland
Mekaanikontie 1
FIN-27510, Eura
+358.2.8383.300 Phone
+358.2.8651.233 Fax
info@ets-lindgren.eu.com
UK
Boulton Road
Pin Green Industrial Area
Stevenage Herts, SG1 4TH
+44.(0)1438.730700 Phone
+44.(0)1438.730751 Fax
info@ets-lindgren.co.uk
France
Centre DAffaires Paris Nord
Batiment Ampere
93153 Le Blanc Mesnil
+33.1.48.65.34.03 Phone
+33.1.48.65.43.69 Fax
LRP.france@wanadoo.fr
Japan
4-2-6, Kohinata, Bunkyo-ku
Tokyo, 112-0006
+81.3.3813.7100 Phone
+81.3.3813.8068 Fax
info@ets-lindgren.co.jp
China
1917-1918 Xue Zhixuan Building
No. 16 Xue Qing Road
Haidian District
Beijing P.R.C 100083
+8610.8275.5086 Phone
+8610.8275.5503 Fax
infochina@ets-lindgren.net
About ETS-Lindgren
ETS-Lindgren is an international manufacturer of
components and systems to measure, shield, and control
electromagnetic and acoustic energy. The companys
products are used for electromagnetic compatibility
(EMC), microwave and wireless testing, electromagnetic
field (EMF) measurement, radio frequency (RF) personal
safety monitoring, and control of acoustic environments.
Our product line ranges from simple bench-top
diagnostic tools to fully integrated turnkey facilities.
With a heritage that includes the famous Rantec brand of
microwave absorber, ETS-Lindgren has been serving RF
and microwave engineers for more than a quarter century.
As part of ESCO Technologies Corporation, we have the
financial strength to meet our commitments, both today
and tomorrow. A leading supplier of engineered products
for growing industrial and commercial markets, ESCO is a
New York Stock Exchange listed company (symbol ESE)
with headquarters in St. Louis, Missouri. Superior Design Capability
With a wide range of products, our standard microwave
absorbers will fit most needs. However, some applications have
special requirements that can only be met with a custom product.
Thats where ETS-Lindgren excels. Instead of cut-and-try
experimentation, our engineer-
ing staff uses powerful worksta-
tions running advanced
numerical modeling programs
to develop the right solution.
Next, prototypes are made and
the design is tested. Results
become part of a valuable
feedback loop for refining our
designs further.
We also work with universities
having
strong
electromag-
netic
programs to
develop new
absorber
technology.
For example,
a number of
collabora-
tions with
Ohio State University resulted in the development of high
performance 153 cm (60 in) curvilinear pyramidal absorber for
NASA. Subsequently, ETS-Lindgren developed several varieties of
curvilinear absorber for defense related applications.
Not everyone needs a custom solution like NASA, but if you do, we
have the in-house resources to satisfy your requirements.
Unique Two-Step Manufacturing
Our computer controlled manufacturing process begins with
homogeneous blocks of polyurethane foam. The blocks are
impregnated with proprietary solution of lossy agents and dried
in large ovens. Next, the blocks are impregnated a second time
with fire retardant salts and dried again. (Non fire retardant
absorber can be ordered on request). This premium
two-step process uniformly distributes both agents
and permanently bonds the carbon throughout the
foam. The benefit is an absorber that does not release
carbon particles which can
contaminate delicate electronic
equipment in the chamber. In fact,
our absorbers can be used in clean
room environments requiring a
Class 100,000 rating.
After impregnation, the foam is
shaped using computer-controlled
saws maintaining tolerances of
�3 mm (.25 in). Cutting the dried
foam into its final shape after the
impregnation process avoids
shrinkage and warping. The benefit
is absorbers that install with uniform geometric alignment, reducing
backscattering, and improving measurement accuracy.
Extensive Testing
RF Consistent Performance
100% of our microwave absorbers are tested for reflectivity
performance. The Naval Research Lab (NRL) broadband swept-
frequency arch measurement method is used for testing at
750 MHz - 6 GHz, and 6 GHz - 18 GHz. (Testing at higher
frequencies can be performed on request.) A coaxial reflectometer
is used to test at frequencies between 30 MHz - 500 MHz,
according to IEEE Standard 1128. The test procedures are
automated and test data is archived electronically and in
hardcopy format, for immediate or future retrieval and analysis.
Why ETS-Lindgren Should be your Choice for Microwave Absorber
Edwards Airforce Base, California
Contact us for information about our other products. Flammability
ETS-Lindgrens Rantec Brand CL combustion limiting polyure-
thane absorber sets the standard for material fire retardancy. We
meet the following U.S. Government and commercial flammability
specifications, as verified by an independent testing laboratory: NRL Report 8093 (Tests 1, 2, and 3) MIT Lincoln Laboratory Specification MS-8-21
(Tests I, II, and III) Raytheon Drawing No. 2693066 (latest revision) UL 94-5VA and UL 94-5VB UL 94 HBF DIN 4102 Class B-2
Strict Quality Control
All ETS-Lindgren microwave absorber products are manufac-
tured in accordance with established quality control and assur-
ance standards. Each piece of absorber is serialized, providing
traceability throughout the manufacturing process. Logbooks are
also maintained for the impregnation process, solids test results,
fire test results, Limiting Oxygen Index (LOI) test results,
receiving inspection test results, and final inspection test results.
Large Capacity
Our 8,639 m
2
(93,000 ft
2
) manufacturing facility in Durant,
Oklahoma is the worlds largest, capable of producing over
24,777 m
3
(10.5 million board feet) of absorber per year.
Capacity like this has allowed us to supply absorber for some
of the biggest chambers ever constructed including: Naval Air Warfare Center in Patuxent River, Maryland,
Advanced System Integration Laboratory (ASIL), dimensions
of 55 m x 55 m, x 18 m (180 ft x 180 ft x 60 ft), lined with
12,263.2 m
2
(132,000 ft
2
) of Rantec microwave absorber. Edwards Air Force Base in California, electronic warfare
and counter measure test facility, dimensions of 80 m x 76 m
x 21 m (265 ft x 250 ft x 70 ft), lined with over 18,952 m
2
(204,000 ft
2
) of RF absorber material, built in 1989
Commitment to Service
Whether you need just a few pieces of absorber or a complete
turnkey chamber, we have the experience and resources to
help you with the right solution. We can be reached by phone,
fax, e-mail, the Internet, or through our worldwide network of
independent ETS-Lindgren representatives.
Production sample testing assures standards are met.
Rantec Microwave and Electronics, California Absorber Installations
From Top to Bottom: CTIA Authorized Test Laboratory, ETS-Lindgren, Cedar Park, TX; Raytheon, Goleta, CA; Rantec Microwave and Electronics, Calabasas, CA; Naval Air Warfare Center, Patuxent River, MD. Contents
Microwave Pyramidal Absorber
4
Flat Laminate Absorber
10
Filter Foam Absorber
10
Walkway Absorber
11
EMC-24PCL
12
High Power Absorber
14
Microwave Curvilinear Absorber

17
How to Order
21
Miter Cuts
22
Lossy Foam Corner Treatments
23
The Manufacturing Process
24
The Testing Process
26
Other Specialty Absorber Products
(request separate data sheets)
Outdoor Vinyl covered Microwave Absorber
Convolute Microwave Absorber
EMC Absorber
FerroSorb
TM
Ferrite Panels
www.ets-lindgren.com
Corporate offices: USA +1.512.531.6400 and Finland +358.2.8383.300
Company locations in the USA, UK, Finland, France, Japan, and China
Representatives and Distributors worldwide.
We have made every attempt to assure that the information in this catalog is current and correct. Please note however that products, description, specifications, and terms
of sale, may change, be discontinued, or withdrawn. Contact our Sales Department for the latest information. This catalog supersedes all previous representations of
products, descr