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.
3Gmetalworx | 905-738-7973
| Toronto, Ontario, Canada
PCB-mounted application-specific RF/EMI shielding enclosures including true multi-cavity
| 703-774-7505 | Centerville, VA
Specializing in EMC testing knowledge and equipment. We offer consulting services
for the use of all EMC & RF test equipment. This includes standards training,
equipment training, and system building. With extensive background knowledge with
all brands and available technologies. Also offering insight and market knowledge
into equipment sales. Many online calculators, including TEM / GTEM cell fields.
Adams Magnetic Products
| 800-747-7543 | Elmhurst, IL
Ferrite cores & accessories, flexible, ceramic, alnico, Samarium Cobalt magnets,
Neodymium products, magnetic assemblies, and more.
| +49 7191 9659 0 | Germany
Microwave components including circulators, isolators, waveguide and coaxial
components, phase shifters, ferrites, thin film technology.
Corp | 800-755-9843 | Philadelphia, PA
EMF & magnetic shielding, metal components & assemblies, sheet metal
and machined components and assemblies.
| 978-388-2993 | Amesbury, MA
Multilayer, reticulated, & Lossy foams, EMI absorbers, EMI shielding gaskets,
magnetic absorbers (MAGRAM), radar absorbing structures (RAS), dielectric materials.
| +886 2 2799 8715 | Taiwan
Hundreds of chambers sold and installed around the world. Over-the-Air (OTA)
measurement systems perform comprehensive measurement and test in a controlled environment.
Compact Antenna Test Range (CATR) with one-touch operation supports multiple standards
and major instrument brands. Multi-probe OTA measurement systems offer reduced time
measurements over single-probe systems.
Systems | 918-624-2888 | Tulsa, OK
Medical enclosures, pyramidal anechoic chambers, shielded doors, Solidcore Modular
Systems, welded enclosures.
| 781-935-4850 | Woburn, MA
Copper foil tape, EMI shielding, elastomer EMI gaskets, thermal management.
| 714-708-8715 | Costa Mesa, CA
Coiltech is a leading manufacturer of high quality surface-mount inductors, chokes,
Coiltronics (now Cooper Bussmann, now Eaton)
636-527-3877 | Ellisville, MO
Transformers & inductors for DC-DC & switchmode applications requiring
high frequency magnetics.
Solutions (CTS) | 1-817-503-8862 | Fort Worth, TX
Concentric Technology Solutions (CTS) is your one source for off-the-shelf RF
Shield Box and RF Enclosures when you need RF shielding with a solid construction
and repeatable results. Also customized integrated RF Shield Box or RF Enclosure
test solution for manual or automatic testing at an off-the-shelf solution price.
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
Cuming Microwave Corporation
| 800-432-6464 | Avon, MA
RF absorbers, dielectric materials, anechoic materials & chambers, syntactic
foam flotation equipment, syntactic foam insulation.
| 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
| 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.
| 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.
| 800-862-1640 | W. Conshohocken, PA
Cores and shielding for electronic applications.
| 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
| 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 (now Laird) | 781-961-9600 | Randolph, MA
Eccosorb microwave & RF absorbers, anechoic chambers. They have a really
nice chart available for determining the dielectric constant and loss tangent.
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.
| 512-531-6400 | Cedar Park, TX
Anechoic chambers, absorbers, antennas, filters, Helmholtz coils, probes, meters,
TEM cells, shielded enclosures, screen rooms, positioners.
| 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.
| 212-268-4020 | New York, NY
Snap-on RFI cable chokes.
| 716-388-1020 | Fairport, NY
Toroids, beads, baluns, multi-hole cores.
| 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.
Systems BV | +31 78 613 13 66 | The Netherlands
RF shielding, Faraday cages, EMI shielding gaskets, conductive foil tape, conductive
glue, conductive paint.
| 214-956-0055 | Dallas, TX
Custom fabrication of EMI/RFI shielding and gasketing, dielectric insulation,
laminates, foils, tapes, adhesives.
| +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,
| 800-843-4556 | Delaware Water Gap, PA
EMI shielding, BeCu, fabric over foam, knitted mesh wire, surface mount shields,
| 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.
| 813-855-6921 | Tampa, FL
Manufactures electronic shielding products including gasketing that help prevent
electromagnetic or radio frequency interference (EMI/RFI) on circuit board
(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.
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
| 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.
| 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.
| 858-452-1700 | San Diego
Designs manufactures innovative RF absorbers, microwave absorbers, and EMI shielding
materials for integration into military and electronics solutions.
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.
| 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).
| 888-669-3539 | Goffstown, NH
Custom shielding, monitor enclosures, raw materials for low frequency RF shielding
up to 50 kHz.
| 973-472-5161 | Passaic, NJ
RF and Microwave absorbers for the DOD and commercial markets.
North East RF | 508-654-0050 | Greater Boston area, MA
Linear | circular polarized antenna measurements and OTA cellular device pre-compliance.
Up to 18" diameter and <10 kg weight. Antennas can be rapidly evaluated and optimized
using our fast near field spherical system. Test results supplied in data file with
pattern viewer software. A picture of the test configuration is included to help
aligned axis. Our selection of human head and hand phantoms are ideal for verification
of body worn devices. Turnaround time is usually 3-days.
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.
| 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.
| 800-749-3677 | Minneapolis, MN
Switchmode, power pulse, linear single phase, linear three phase transformers,
common mode chokes, CRT magnetics, antenna, solenoid, armature coils.
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.
| 800-875-1093 | Buffalo, NY
Heating elements, filters & screens, encoder discs, RF shields, recharge
grids, stamping, forming, plating, sub assembly, painting, heat treating, laser
| 949-452-0511 | Lake Forest, CA
Gaskets, shielding, line filters.
| 631-231-6400 | Bay Shore, NY
EMI/RFI chassis feedthrough filters.
| +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.
| 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.
| 800-204-0863 | Rochester, NY
Gaskets, I/O backplane shielding gaskets, BeCu Fingerstock, conductive envelopes,
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.
Corporation | 818-764-8222 | 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,
| 508-747-0300 | Plymouth, MA
EMI/RFI shielding, precision parts, flexible circuits.
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.