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 solutions.
Absolute EMC |
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,
| +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.
+886 2 2799 8715 | Taiwan City, 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.
Braden Shielding Systems
| 918-624-2888 | Tulsa, OK
Medical enclosures, pyramidal anechoic chambers,
shielded doors, Solidcore Modular Systems, welded enclosures.
Chomerics | 781-935-4850
| Woburn, MA
Copper foil tape, EMI shielding, elastomer EMI gaskets, thermal
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, now Eaton)
Transformers & inductors for DC-DC & switchmode applications
requiring high frequency magnetics.
Concentric Technology Solutions
(CTS) | 1-817-503-8862 | Fort Worth, TX
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.
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.
| 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.
| 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 products.
| 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
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,
| 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
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.
| 800-843-4556 | Delaware Water Gap, PA
EMI shielding, BeCu, fabric over
foam, knitted mesh wire, surface mount shields, conductive elastomers.
LBA Group | 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
Leader Tech |
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.
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
| 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.
| 973-472-5161 | Passaic, NJ
RF and Microwave absorbers for the DOD and commercial
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
Panashield | 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
| 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.
| 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.
| 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.
| 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.
Limited | 01376 330033 | Braintree Essex UK
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,
Spira Manufacturing Corporation
| 818-764-8222 | North Hollywood, CA
EMI shielding, gaskets, spiral wrap,
TDK | 516-535-2600 | Garden
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
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.