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These companies manufacture a variety of magnetics, absorbers, and shielding for use in RF applications. Applications range from RFI/EMI enclosures to screen rooms, custom shielding for PCBs, and machined chassis, noise filters, or ferrites for keeping RF energy on the right side of a conductor can be found here.

Achieving a successful RF design is often dependent upon proper implementation of shielding. The higher the frequency, the higher the power levels, or the more crowded the frequency band, the more difficult it is to design shielding that will provide the necessary level of isolation. Fortunately, there is a lot of design information available in the form of white papers, datasheets, and online write-ups.

For most applications, it is possible to obtain success using off-the-shelf components and well-tried methods. Sometimes, though, it is necessary to secure the assistance of engineers whose experience lies in the realm of shielding. Please consider contacting RF Cafe advertisers first when seeking such services.

Absorber, Magnetics & Shielding Design Data

3Gmetalworx Concord, Ontario 888-965-3634 Since 1994, leading wireless electronics companies have relied on 3Gmetalworx to deliver cutting edge solutions for advanced RF/EMI PCB-level shielding requirements. From prototyping and design services to JIT manufacturing supply, our clients depend on us to provide a seamless service pathway supporting entire product lifecycle. RoHS / WEE Compliant. All our shields can incorporate these features, as well as your custom needs: ▪ Engagement Tabs ▪ Trace/Component Relief ▪ Tuning/Access Openings ▪ Thermal Relief Basic Shielding Cans   Meant for permanent installation Single-Cavity Shield Sets   Cover can be removed and re-installed Multi-Cavity Shield Sets   Cover can be removed and re-installed Tin Plated Mild Steel for indoor or economical commercial applications. Nickel Silver Alloy for outdoor, marine, avionic or defense applications. 3Gmetalworx, Inc 905-738-7973 / Toronto, Ontario, Canada PCB-mounted application-specific RF/EMI shielding enclosures, including true multi-cavity solutions. Adams Magnetic Products 800-747-7543 / Elmhurst, IL Ferrite cores & accessories, flexible, ceramic, alnico, Samarium Cobalt magnets, Neodymium products, magnetic assemblies, and more. AFT Microwave +49 7191 9659 0 / Germany Microwave components including circulators, isolators, waveguide and coaxial components, phase shifters, ferrites, thin film technology. Amuneal Manufacturing Corp 800-755-9843 / Philadelphia, PA EMF & magnetic shielding, metal components & assemblies, sheet metal and machined components and assemblies. Arc Technologies 978-388-2993 / Amesbury, MA Multilayer, reticulated, & Lossy foams, EMI absorbers, EMI shielding gaskets, magnetic absorbers (MAGRAM), radar absorbing structures (RAS), dielectric materials. Braden Shielding Systems 918-624-2888 / Tulsa, OK Medical enclosures, pyramidal anechoic chambers, shielded doors, Solidcore Modular Systems, welded enclosures. CET Technology 603-894-6100 / Windham, NH Linear power transformers, inductors, chokes, toroids, power inductors, filters, EMI/RFI control, PC mount, surface mount and chassis mount, linear, switching power supplies, UL/CUL and TUV approved. Chomerics 781-935-4850 / Woburn, MA Copper foil tape, EMI shielding, elastomer EMI gaskets, thermal management. Coiltech 714-708-8715 / Costa Mesa, CA Coiltech is a leading manufacturer of high quality surface-mount inductors, chokes, and coils. Coiltronics (now Cooper Bussmann) 636-527-3877 / Ellisville, MO Transformers & inductors for DC-DC & switchmode applications requiring high frequency magnetics. Credowan (now Cobham) +44 (0) 1243 670711 / UK Manufacturer and supplier of microwave equipment including waveguides, couplers, diplexers, anechoic chambers, antenna rotary joints, antenna, radar & satellite communications subsystems & components for commercial and military applications. Cuming Lehman Chambers 717-264-2265 / Chambersburg, PA Design and construction of RF shielded anechoic chambers for the commercial and defense markets. Cuming Microwave Corporation 800-432-6464 / Avon, MA RF absorbers, dielectric materials, anechoic materials & chambers, syntactic foam flotation equipment, syntactic foam insulation. Cybershield 888-725-5361 / Dallas/ TX EMI/RFI shielding solutions using plating, vacuum metallization and conductive paint. Dispensed conductive gaskets. 3D metal patterns on plastic, including printed antennas. Delta Electronics 510-668-5100 / Fremont, CA Switching power supplies, chip inductors, DC/DC converters, voltage regulator modules, EMI filters, voltage controlled oscillators (VCO), temperature controllers, thermal management products, video displays. EAC Shielding 562-926-7742 / Santa Fe Springs, CA EMI/RFI Shielding products, EMI/RFI honeycomb panels, EMI shielding air vents, wire mesh, gaskets, connector gaskets, die cutting, bonding. Eagle Group Northeast Corp 508-384-9700 / Woonsocket, RI EMI / RFI & microwave foil shielding, RF absorbers, injection molding. Eastern Components 800-862-1640 / W. Conshohocken, PA Cores and shielding for electronic applications. Elna Magnetics 800-553-2870 / Woodstock, NY Magnetic components, in standard and non-standard core shapes, soft ferrites, amorphous alloy, powdered iron, MPP and Sendust cores & accessories, core gapping, CNC machining, conventional grinding, and assembly of ferrite & other magnetic products. Emicon Corporation 915-590-0795 / El Paso, TX Custom manufacturer of coils, powerline filters, signal line filters, EMI filters, low pass filters and inductors. Emerson & Cuming Microwave Products 781-961-9600 / Randolph, MA Eccosorb microwave & RF absorbers, anechoic chambers. Espey Mfg & Electronics Corp 518-245-4400 / Saratoga Springs, NY Custom magnetic design, mW to MegaW, all forms including pulse, impedance matching, SMPS, power, rectifier, inductor, reactor, mag-amp, CT, PT, high voltage to 300kV. ETS-Lindgren 512-531-6400 / Cedar Park, TX Anechoic chambers, absorbers, antennas, filters, Helmholtz coils, probes, meters, TEM cells, shielded enclosures, screen rooms, positioners. Fair-Rite Products 800-836-0426 / Wallkill, NY Large toroids, chip beads, chip inductors. FDK 858-558-8368 / San Diego, CA / Japan Piezoelectric buzzers, capacitors, inductors, resistors, transformers, anechoic chambers, ferrites, VCO's, power supplies, circulators, combiners/dividers, motors, optics, synthesizers, batteries, RF absorbers, switches. Ferrishield 212-268-4020 / New York, NY Snap-on RFI cable chokes. Ferronics 716-388-1020 / Fairport, NY Toroids, beads, baluns, multi-hole cores. Ferroxcube 915-599-2616 / El Paso, TX Soft ferrite products & accessories, integrated inductive components, multilayer suppressors & inductors. Fischer Custom Communications 310-891-0635 / Torrance, CA TEM cells, EMI filters, Helmholtz coils. Holland Shielding Systems BV +31 78 613 13 66 / The Netherlands RF shielding, Faraday cages, EMI shielding gaskets, conductive foil tape, conductive glue, conductive paint. Insul-Fab 214-956-0055 / Dallas, TX Custom fabrication of EMI/RFI shielding and gasketing, dielectric insulation, laminates, foils, tapes, adhesives. Kemtron +44 (0)1376 348115 / Braintree, Essex, UK EMI shielding conductive fabric for cable shielding, stainless wire mesh, conductive tube, conductive / EMI shielding fabric adhesive tape and all kinds of gasket, etc. KOA Speer Electronics 814-362-5536 / Bradford, PA Resistors, capacitors, 3-terminal EMI/RFI filters, circuit protection, inductors, integrated components. Laird Technologies 800-843-4556 / Delaware Water Gap, PA EMI shielding, BeCu, fabric over foam, knitted mesh wire, surface mount shields, conductive elastomers. LBA Group, Inc 252-757-0279 / Greenville, NC RF & wireless telecommunications industry products & services including antennas, capacitors, inductors, shielding systems, test equipment, testing and technical services. RF Awareness & Antenna Co-Location Training. Leader Tech, Inc 813-855-6921 / Tampa, FL Manufactures electronic shielding products including gasketing that help prevent electromagnetic or radio frequency interference  (EMI/RFI) on circuit board applications. Lindgren RF (now ETS-Lindgren) 512-531-6400 / Cedar Park, TX Absorbers, antennas, shielded fiber optic camera systems, RF Microwave test chambers, EMF instruments, power and signal line filters, positioners, probes, test boxes.

Fotofab Chicago, IL Tel: 773-463-6211 Fax: 773-463-3387 A World Apart in a World of Parts Fotofab Chemical Etching - A leading supplier of mission critical thin metal parts since 1967. Custom-made precision metal parts - chemical etching, metal stamping, RF shielding, or any custom part made out of metal.  • Chemical etching to 0.004 ±0.002 in.  • Laser etching to 0.001 ±0.0002 in.  • RF/EMI Shielding  • Metal Stamping  • Lead Frames  • Request a Free Quote  • Same-Day Rapid Prototyping  • Connector Housings  • Design Guidelines  • Apertures  • Filter Screens We are pleased to send you some sample parts, design guide and more information regarding our quality custom parts, short lead-times and low cost services. Please contact us for more information. Fotofab parts are as RoHS compliant as the specs you provide to us. Magnetic Component Engineering 800-989-5656 / Torrance, CA Blocks, discs, rings, and round bars in various materials, services including magnetizing, testing, stabilization, calibration of magnets, advanced coatings & platings, assembly of PM systems & structures, design, engineering, plate magnets, tube magnet assembly, pulleys, Hopper Grates, magnetic sweepers, stationary overhead systems. Magnetics 800-245-3984 / Pittsburgh, PA MnZn ferrite cores for high frequency power transformers and inductors, EMC filters, and other applications, powder cores for switched-mode power supplies, switching regulators, and noise filters, strip wound cores come as tape cores, cut cores, miniature bobbin cores, or ring cores and are used in safety critical applications, aerospace, and medical applications. MAJR Products 888-763-2952 / Saegertown, PA Electromagnetic Interference / Radio Frequency Interference (EMI/RFI) Shielding - gaskets, elastomers, fingerstock and air ventilation / filtration panels, grounding washers, ferrites, thermal management. Masach Technologies Ltd 972-2-5356607 / Israel Customized RF shielding, RF shields, RMI solutions, RFI solutions. Fast, high quality, cost effective RF shields, standard and custom designed. MAST Technologies 858-452-1700 / San Diego Designs manufactures innovative RF absorbers, microwave absorbers, and EMI shielding materials for integration into military and electronics solutions. Metglas 800-581-7654 / Conway, SC Amorphous metal ribbon and components used in the production of electrical distribution transformers, high frequency magnetic components for power electronics, material for anti-theft tags, brazing alloys, solder, and toroid cores. Micrometals 800-356-5977 / Anaheim, CA Toroids, iron powder cores for power conversion & line filter applications & radio frequency applications, magnetic alloy core materials for high temperature applications, inductor design software (free). MuShield 888-669-3539 / Goffstown, NH Custom shielding, monitor enclosures, raw materials for low frequency RF shielding up to 50 kHz. MWT Materials, Inc 973-472-5161 / Passaic, NJ RF and Microwave absorbers for the DOD and commercial markets. Orbel 610-829-5000 / Easton, PA EMI/RFI shielding, board level RF shielding, multi-cavity shields, finger stock, chemical etched metal parts, metal stamping and electroplating services. Panashield, Inc 203-866-5888 / Norwalk, CT Anechoic chambers, shielded enclosures, reverberation chambers. P & P Technology Ltd +44 (0) 1376 550525 / UK Manufacturer of EMI / RFI shielding gaskets, meshes and vents. Precision Incorporated 800-749-3677 / Minneapolis, MN Switchmode, power pulse, linear single phase, linear three phase transformers, common mode chokes, CRT magnetics, antenna, solenoid, armature coils. Precision Micro Ltd +44 121 380 0100 / UK EMI/RFI shielding solutions, from design to compliance. Precision manufacturing technologies from Ion beam and electroforming to photo etch and laser cutting. Precision Photofab 800-875-1093 / Buffalo, NY Heating elements, filters & screens, encoder discs, RF shields, recharge grids, stamping, forming, plating, sub assembly, painting, heat treating, laser services. Premier Magnetics 949-452-0511 / Lake Forest, CA Gaskets, shielding, line filters. RFI Corporation 631-231-6400 / Bay Shore, NY EMI/RFI chassis feedthrough filters. RFI Industries +61 3 8739 6700 / Victoria, Australia Design, fabricate, install and test all types of R shielded enclosures, from a small bench top model for laboratory use to a large complex for military vehicle testing. Testing services. SAS Industries 631-727-1441 / Manorville, NY Specializes in the manufacture of EMI shielding, waveguide, connector, conductive, non-conductive, washer style, co-elastomer gaskets, fluid sealing products, static and reciprocating seals, and O-rings. Capabilities include die cutting, molding, laser cutting, extruding, and water jet cut gaskets, along with a wide variety of stocked sheet and roll goods. Schlegel Systems 800-204-0863 / Rochester, NY Gaskets, I/O backplane shielding gaskets, BeCu Fingerstock, conductive envelopes, tapes, laminates. Shielding Solutions Limited 01376 330033 / Braintree Essex UK Design, manufacture and application of components and materials for the control of electromagnetic interference EMI and environmental sealing. Silver Cloud Manufacturing 856-825-8900 / Millville, NJ EMI/RFI shielding, ESD protection, custom filters & lenses, anti reflective surfaces, display protectors, heat shields, membrane switches. Spira Manufacturing Corporation818-764-8222 / North Hollywood, CA EMI shielding, gaskets, spiral wrap, honeycomb filters. TDK 516-535-2600 / Garden City, NY Filters, multi-layer ceramic capacitors, inductors, EMC components, LAN components, ferrite cores, amorphous cores, transformers, magnets, magnet applied products, piezoeletronic products, delay lines, sensors, power supply, RF components, RF modules, and more. Tech-Etch 508-747-0300 / Plymouth, MA EMI/RFI shielding, precision parts, flexible circuits. Tusonix 520-744-0400 / Tucson, AZ EMI/RFI filters, surface mount EMI filters, variable trimmer capacitors, filtered terminal blocks, custom EMI filter plate assemblies, ceramic disc capacitors. West Coast Magnetics 800-628-1123 / Stockton, CA Switch mode, 60 Hz, isolation, base drive, current sense transformers, RF, power inductors, common mode chokes. W.L. Gore & Assoc 800-311-3060 / Elkton, MD Coax cables and harnesses, SMT RF grounding pads, EMI gaskets, thermal interface materials, dielectric materials.

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