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,
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),
+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)
636-527-3877 | Ellisville,
Transformers & inductors for DC-DC & switchmode applications requiring
high frequency magnetics.
Concentric Technology 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.
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.
| 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
(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.
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 | 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 | 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
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 | 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,
EMI/RFI shielding, board level RF shielding, multi-cavity shields, finger
stock, chemical etched metal parts, metal stamping and electroplating services.
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,
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.
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
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 Corporation
| 818-764-8222 | North Hollywood, CA
EMI shielding, gaskets, spiral wrap, honeycomb
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 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.