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About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Kirt Blattenberger,

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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Manufacturers & Services

As the environment becomes more and more crowded in the RF realm, interference has become a major issue. Far more than simply an occasional nuisance, this phenomenon has the potential to seriously interrupt the conducting of business, personal communications, hobbies and even critical life support monitoring systems. As a radio control model hobbyist myself (see my Airplanes And Rockets Website), I have been aware for 30 years about the perils of interference and the profoundly disastrous results that can occur is left unchecked. Preventing interference is a big part of the cure, since it is not always possible to simply design a receiver that can reject the interference.

The manufacturers & services listings here should help you find the assistance you need. Please see the Absorber, Magnetics & Shielding Links and the ESD | EOS pages for more related links.

EMC | EMI | RFI Resources

3G Shielding Specialties - RF Cafe3G Shielding Specialties
Tampa, Florida   844 808 3GSS (3477)

3G Shielding Specialties Products - RF Cafe3G Shielding Specialties offers synergistic solutions incorporating metalwork, conductive elements, microwave absorbers and thermal transfer solutions in a single, integrated, turn-key package. Application specific and standard product lines. Design services available. ITAR Registered




A comprehensive line of conductive EMI Shielding Gaskets.

• Fabric over
• Conductive
• Conductive
• Mesh materials

Board Level


Design and manufacture of standard and customized Board Level Shielding.

• 1-piece, 2-piece
   and multi-zone
• Surface mount
   & through-hole
• Unlimited design



Advanced Microwave Absorbers to reduce undesirable radiation.

• Narrowband
• Cavity
• Surface Wave
• Dielectric Foam

905-738-7973 | Toronto, Ontario, Canada
PCB-mounted application-specific RF/EMI shielding enclosuresluding true multi-cavity solutions.

Adamson Consulting
720-496-4002 | Boulder, CO
Specialists in intellectual properties strategies, product development, safety marks, and onsite electromagnetic measurements.

Advanced Compliance Solutions
770-831-8048 | Buford, GA
Provides complete EMC, product safety and environmental testing of your products.

AFM Microelectronics
858-222-1199 | San Diego, CA
RF/microwave multilayer capacitors, high power high current multilayer, high temperature high voltage multilayer, GBBL high K substrates for single layer capacitors, ultra low fire dielectric powder. Sizes range from 0201 - 13560, with operating voltages from 25 - 20k volts.

A.H. Systems | 818-998-0223 | Chatsworth, CA
Manufacturer of individual calibrated EMC antenna kits, log periodics, biconical, dipoles, loops, monopoles, horns, preamplifiers, current probes and low-Loss cables that satisfy many compliance testing standards.

Applied Physical Electronics (APELC)
512-264-1804 | Austin, TX
Marx generators having output pulses with ultrafast rise times, moderate pulse widths, and amplitudes ranging from tens of kV to several MV. RS-105 MIL-STD-461 E/F tester for EMI/EMC. Testing antennas.

AR RF/Microwave Instrumentation (formerly Amplifier Research)
215-723-8181 | Souderton, PA
RF power amplifiers, solid state microwave amplifiers, TWT amplifiers, antennas, transient generators, EMC test systems and software, field probes and monitors, test accessories, and RF test system controllers.

Braco Compliance | +64 21 208 4303 | New Zealand
Australia and New Zealand C-Tick agent, NZ radiocommunications agent and NZ medical device sponsor that enables suppliers to meet the electromagnetic compatibility (EMC) regulatory regimes of both Australia and New Zealand.

Compliance Engineering Pty
+(613) 9763 3079 | Knoxfield Australia
A single source for all of your EMC requirementsluding EMC compliance testing, EMR surveys, consultancy, EMC equipment sales, EMC test system integration, RF shielded enclosures, and antennas.

Com-Power Corporation | 714-587-9800 | Brea, CA
Manufactures wide variety of EMI | EMC test equipment used for compliance testing, precompliance testing or solving EMC problems. Turnkey systems available. Active horn antennas, comb generators, field probes, spectrum analyzers, more.

Corcom (now Tyco)
Power line filters, power entry modules, signal line, facility, DC rated filters.

Cybershield | 888-725-5361 | Dallas/ TX
EMI/RFI shielding solutions using plating, vacuum metallization and conductive paint. Dispensed conductive gaskets. 3D metal patterns on plasticluding printed antennas.

East Coast Shielding
908-227-6857 | Hackettstown, NJ
EMI shielding products. Serving the electronics and commercial industries with high quality gaskets, gasket materials, and die-cutting materials. Whether you need a die cut, molded, or extruded material, we have the knowledge, expertise, and materials to meet your every need.

EMC Technology Florida RF Labs
800-544-5594 | Stuart, FL
Thin and thick film passive devices, attenuators, resistors, terminations, equalizers.

EMC Test Design | 508-292-1833 | Newton, MA
Offers the complete line of Smart Fieldmeter® models including three broadband electromagnetic field probes, covering the frequency range 100 KHz-18 GHz, and one selective GSM probe for GSM 900-1900 MHz range.

Empower RF Systems | www.310-412-8100 | Inglewood, CA
Founded in 1999, Empower RF Systems is a U.S.-based company and global leader in power amplifier solutions that are critical to defense, commercial, and industrial market applications. Investments in both hardware and software engineering are yielding next generation products with significant size, weight, and interface functionality advantages over legacy products in the market.​

Global Advantage International (now TÜV SÜD Canada Inc.)
905-883-3919 | Toronto, Ontario, Canada
Product EMC & safety testing, complete product safety, regulatory compliance and EMC solution provider.

Harwin | 603-893-5376 | Salem, NH
Connectors, IC sockets, PCB sockets, components & PCB accessories, application tooling.

Instruments for Industry (IFI)
631-467-8400 | Ronkonkoma, NY
Amplifier configurations such as tetrode tubes, TWTs, klystrons, and solid state devices. Standard horn antennas and TEM cells.

Kete Microwave Electronics
+86-595-22597735 | China
Ferrite RF isolator & circulators, high power RF resistors & terminations, fixed & variable/step attenuators, multilayer High-Q chip ceramic& feedthrough capacitor (EMI filters), directional couplers, power dividers / combiners, 3dB hybrid couplers.

Kform | 703-450-4401 | Sterling, VA
RF shielded server rack enclosure, waveguides, EMI/RFI shielding, goof plugs, manufacturing and design services.

Koral Associates
+44 149 183 1682 | South Oxfordshire, UK
Radio frequency heating and drying consultancy service. Radio Frequency Interference (RFI) advice and solutions: assistance with EN55011 (Europe), AS2064 (Australia) and FCC Title 47 Part 18 (USA) compliance and measurement. Practical shielding and filtering solutions for RFI reduction for existing machines and new designs Health and Safety Advice and Solutions including OSHA CFR 1910-97 (USA) Physical Agents Directive requirements for Non Ionising Radiation (Europe) Safe Interlocking, design of protective systems. RF Awareness. Triode tube (Valve) calculations and replacement advice. Expert witness service.

Laird Technologies | 866-928 8181 | St. Louis, MO
Designer and manufacturer of antenna, electromagnetic interference [EMI], telematics and thermal management solutions for the telecommunications, data-communications, computer, general electronics, network equipment, aerospace, defense, automotive and medical equipment industries.

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.

LCR Electronics | 800-527-4362 | Norristown, PA
Specializes in the design, development and manufacturing of custom and standard EMI filters (RFI filters, EMC filters), EMC solutions, Motor controls, Electronic controls, Subsystem enclosures and back planes.

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.

Mag Layers USA | 800-427-4010 | Santa Ana, CA
LTCC components for RF | Bluetooth | WiFi | Zigbee applications including: chip antennas, baluns, diplexers, band pass filters, filters, inductors, chokes, coils, & ferrite beads. ISO 140001 certified, complete support for design through production. Free Samples - just call!

Nemko Canada
613 737 9680 | Ottawa, Ontario, Canada
TCB and CCB offering wireless certification and also a test laboratory covering wireless, EMI, safety, laser safety and telecom. We offer one-stop-shop solutions for worldwide compliance to standards such as FCC, RSS, CE Marking, UL, CSA, Korea, and Taiwan. We also have experienced design engineers who can help with product design and compliance strategies.

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.

P & P Technology Ltd | +44 (0) 1376 550525 | UK
Manufacturer of EMI | RFI shielding gaskets, meshes and vents.

Pepro | 1-814-676-5688 | Oil City, PA
A faraday cage protection system offering protection from lightning strikes, Electromagnetic Pulse (EMP), Electromagnetic Interference (EMI), and Radio Frequency Interference (RFI), lessens effects of Passive Inter-Modulation (PIM) when equipment is installed/maintained properly. Mobile radio sites designed for emergency temporary & portable mobile communicationsident command posts, remote base stations, Cell on Wheels (COWS), Site on Wheels (SOWS), Tower on Wheels (TOWS), Mobile Tower Units (MTU), Cell site On Wheels (cellular emergency services) and other unique applications.

Precision Micro | +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.

RFI Corporation | 631-231-6400 | Bayshore, NY
EMI/EMC/RFI filters, high voltage magnetics & capacitors.

RFI Industries | +61 3 8739 6700 | Australia
Designs, fabricates, installs and tests all types of Radio Frequency shielded enclosures; offers sales and service for a complete range of highly specialized EMI/EMC instruments, antennas and accessories; offers a wide range of testing capabilities and can handle items ranging from mobile phones to large military vehicles.

RFTek | 919-622-4088 | Raleigh, NC
Consulting and contracting services for Electromagnetic Compatibility (EMC), Electrostatic Discharge (ESD): design, test and compliance.

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.

Shielding Solutions Limited
01376 330033 | Braintree Essex UK
Design, manufacture & application of components and materials for the control of electromagnetic interference EMI and environmental sealing.

Stork Garwood Laboratories (now Element Materials Technology)
888-427-4111 | Pico Rivera, CA
Product testing labs for EMI, EMC, reliability, vibration and environmental testing, FCC approval and CE certification testing, CE and CCC marking.

Wurth Electronics Midcom
605-886-4385 | Watertown, SD
+49 79 42 945 - 0 | Waldenburg, Germany
Custom and power magnetics, EMC components, common mode chokes, capacitors, transformers, RF inductors, printed circuits boards, terminal blocks, automotive magnetic components, electronic displays, LEDs, control units, and keypads. Surface mount and through-hole packages available. Free samples of catalog items are available on request.

York EMC Services
+44 (0) 1904 434440 | UK
EMC test equipment, consultancy and research, CPD & training, EMC & LVD testing.