Microwave Absorber About ETS-Lindgren Selection Guide ETS-Lindgren is an international manufacturer of components and systems to measure, shield, and control electromagnetic and acoustic energy. The company’s 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. USA UK Finland 1301 Arrow Point Drive Boulton Road Mekaanikontie 1 Cedar Park, Texas 78613 Pin Green Industrial Area FIN-27510, Eura +1.512.531.6400 Phone Stevenage Herts, SG1 4TH +358.2.8383.300 Phone +1.512.531.6500 Fax +44.(0)1438.730700 Phone +358.2.8651.233 Fax [email protected] +44.(0)1438.730751 Fax [email protected] [email protected] France Japan China Centre D’Affaires Paris Nord 4-2-6, Kohinata, Bunkyo-ku 1917-1918 Xue Zhixuan Building Batiment Ampere Tokyo, 112-0006 No. 16 Xue Qing Road 93153 Le Blanc Mesnil +81.3.3813.7100 Phone Haidian District +33.1.48.65.34.03 Phone +81.3.3813.8068 Fax Beijing P.R.C 100083 +33.1.48.65.43.69 Fax [email protected] +8610.8275.5086 Phone [email protected] +8610.8275.5503 Fax [email protected] RANTEC MICROWAVE ABSORBER RANTEC MICROWAVE ABSORBER www.ets-lindgren.com 5/03 2 k W © 2003 ETS-Lindgren. REV B Information presented is subject to change as product enhancements are made. Contact the ETS-Lindgren Sales Department for current specifications. Why ETS-Lindgren Should be your Choice for Microwave Absorber absorber can be ordered on request). This premium two-step process uniformly distributes both agents and permanently bonds the carbon throughout the Superior Design Capability foam. The benefit is an absorber that does not release With a wide range of products, our standard microwave carbon particles which can absorbers will fit most needs. However, some applications have contaminate delicate electronic special requirements that can only be met with a custom product. equipment in the chamber. In fact, That’s where ETS-Lindgren excels. Instead of “cut-and-try” our absorbers can be used in clean experimentation, our engineer- room environments requiring a ing staff uses powerful worksta- Class 100,000 rating. tions running advanced After impregnation, the foam is numerical modeling programs shaped using computer-controlled to develop the right solution. saws maintaining tolerances of Next, prototypes are made and ±3 mm (.25 in). Cutting the dried the design is tested. Results foam into its final shape after the become part of a valuable impregnation process avoids feedback loop for refining our shrinkage and warping. The benefit designs further. is absorbers that install with uniform geometric alignment, reducing We also work with universities backscattering, and improving measurement accuracy. having strong electromag- Extensive Testing netic RF Consistent Performance programs to 100% of our microwave absorbers are tested for reflectivity develop new performance. The Naval Research Lab (NRL) broadband swept- absorber frequency arch measurement method is used for testing at Contact us for information about our other products. technology. 750 MHz - 6 GHz, and 6 GHz - 18 GHz. (Testing at higher For example, frequencies can be performed on request.) A coaxial reflectometer a number of is used to test at frequencies between 30 MHz - 500 MHz, collabora- according to IEEE Standard 1128. The test procedures are tions with automated and test data is archived electronically and in Ohio State University resulted in the development of high hardcopy format, for immediate or future retrieval and analysis. 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 Edwards Airforce Base, California Large Capacity Our 8,639 m2 (93,000 ft2) manufacturing facility in Durant, Oklahoma is the world’s largest, capable of producing over 24,777 m3 (10.5 million board feet) of absorber per year. Capacity like this has allowed us to supply absorber for some Production sample testing assures standards are met. of the biggest chambers ever constructed including: • Naval Air Warfare Center in Patuxent River, Maryland, Flammability Advanced System Integration Laboratory (ASIL), dimensions ETS-Lindgren’s Rantec Brand CL combustion limiting polyure- of 55 m x 55 m, x 18 m (180 ft x 180 ft x 60 ft), lined with thane absorber sets the standard for material fire retardancy. We 12,263.2 m2 (132,000 ft2) of Rantec microwave absorber. meet the following U.S. Government and commercial flammability • Edwards Air Force Base in California, electronic warfare specifications, as verified by an independent testing laboratory: and counter measure test facility, dimensions of 80 m x 76 m • NRL Report 8093 (Tests 1, 2, and 3) x 21 m (265 ft x 250 ft x 70 ft), lined with over 18,952 m2 • MIT Lincoln Laboratory Specification MS-8-21 (204,000 ft2) of RF absorber material, built in 1989 (Tests I, II, and III) • Raytheon Drawing No. 2693066 (latest revision) Commitment to Service • UL 94-5VA and UL 94-5VB Whether you need just a few pieces of absorber or a complete • UL 94 HBF turnkey chamber, we have the experience and resources to • DIN 4102 Class B-2 help you with the right solution. We can be reached by phone, fax, e-mail, the Internet, or through our worldwide network of Strict Quality Control independent ETS-Lindgren representatives. 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. 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 FerroSorbTM 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, descriptions, specifications, and terms of sale in previous literature. Copyright 2003. Printed in the United States of America 5/03 2K W Rev. B Microwave Pyramidal Absorber ETS-Lindgren EHP pyramidal absorber is an ultra broadband microwave absorber recommended for areas where energy is at normal incidence. Generally, pyramidal absorber is preferred for specular treatment on chamber back walls, side walls, floors, and ceilings Features Applications • Numerically Optimized Design • Telecom/Wireless • Automotive • 200 V/m Power Handling Capability • Satellite • Military • Fire Retardant • High-Speed Electronics Maximum Reflections at Normal Incidence MODEL L-BAND S-BAND C-BAND X-BAND KU-BAND K-BAND NUMBER 80 MHz 120 MHz 200 MHz 300 MHz 500 MHz 1-2 GHz 2-4 GHz 4-8 GHz 8-12 GHz 12-18 GHz 18-40 GHz EHP-3PCL -30 dB -40 dB -45 dB -45 dB EHP-5PCL -30 dB -40 dB -45 dB -50 dB -50 dB EHP-8PCL -30 dB -40 dB -45 dB -50 dB -50 dB -50 dB EHP-12 PCL -35 dB -40 dB -45 dB -50 dB -50 dB -50 dB EHP-18 PCL -30 dB -40 dB -45 dB -50 dB -50 dB -50 dB -50 dB EHP-24PCL -20 dB -30 dB -35 dB -40 dB -50 dB -50 dB -50 dB -50 dB -50 dB EHP-36 PCL -11 dB -13 dB -25 dB -30 dB -40 dB -45 dB -50 dB -50 dB -50 dB -50 dB -50 dB EHP-48 PCL -15 dB -20 dB -30 dB -35 dB -40 dB -45 dB -50 dB -50 dB -50 dB -50 dB -50 dB EHP-72 PCL -20