The companies listed here can supply your needs for any type of filter. They provide not only a stock of off-the-shelf models, but can also design and manufacture custom models for meeting specialty selectivity, group delay, insertion loss, form factor, power handling, or other unique parameters. Everyone is clear on what a filter is, but there exists a lot of confusion over what is the difference between a duplexer and a diplexer. As you might expect, there are a lot of opinions - even between manufacturers. Traditionally, duplex communications implies the ability to transmit (Tx) and receive (Rx) on the same channel simultaneously. doing so requires a means of separating the transmit and receive paths in a manner rendering them independent of each other, i.e., isolation. Thus, a duplexer is used. One method is to use a circulator for routing signals from the transmitter to the antenna while routing singles from the antenna to the receiver. If the Tx and Rx operate at different frequencies, the job can be accomplished by a set of filters with a common feed point. A diplexer is usually thought of as a set of filters, again with a common feed point, that is used to combine or split signals travelling to or from an antenna, respectively, while providing isolation between the two independent paths. If more than two independent paths are required, the name for both usually changes to a common term: multiplexer.
    AKON | 408-432-8039 | San Jose, CA
Microwave amplifiers 0.5 to 20.0 GHz, power dividers and gain (slope) equalizers 1.0 to 18.0 GHz, converter assemblies 2.0-20.0 GHz, filter banks and switch filter banks 2.0-18.0 GHz, discriminators. Amplitronix | 714-918-4752 | Costa Mesa, CA
Manufacturer of high quality RF and IF Surface acoustic Wave (SAW) filters, resonators, and Voltage Controlled Oscillators (VCO). Anatech Electronics | 973 772-4242 | Garfield, NJ
Focuses on the design and manufacturing of RF and microwave filters and related products. A broad array of products are employed in commercial, aerospace and defense, and industrial applications throughout the world. Products include bandpass, lowpass, highpass, and bandstop filters, duplexers, diplexers, and triplexers, in lumped element (LC), ceramic, cavity, crystal, SAW, and helical configurations. AVX | 843-946-0414 | Myrtle Beach, SC
Capacitors, thin film directional couplers, Z-chip combo R&C impedance matching surface mount chip, ESD/surge protection, EMI/RFI feedthrough filters, AVX SPIMIC capacitor calculation, connectors - PCB, rack-and-panel, DIN, coaxial/RF, filters, resistors. Bree Engineering | 760-510-4950 | San Marcos, CA
Standard SMT packages, data link, low profile surface mount LC, PCB Mounted LC, combline, non-reflective, High power low-pass, image reject combline filters, GPS diplexers, GPS diplex band splitters, highpass/lowpass diplexers, and more. Cernex | 408-541-9226 | Sunnyvale, CA
Amplifiers, antennas, couplers, isolators, circulators, filters, diplexers, oscillators, noise sources, switches, phase shifters, transition & adapters, mixers, waveguide products, attenuators, terminations, detectors, subsystems. Channel Microwave | 805-482-7280 | Camarillo, CA
Coaxial and waveguide isolators, circulators, ISO-adapters, integrated assemblies, filters, terminations. Ciao Wireless | 805-389-3224 | Camarillo, CA
Broad selection of amplifiers for multi-octave, octave & ½-octave, broadband, LNAs, and RF limiting. Replacement amplifiers for anything previously or currently made by JCA Technology, Cougar (connectorized versions), Avantek, WJ, CTT, Celeritek, Amplica, among others, but at a much quicker delivery. Also manufacture radial combiners and space qualified filters. Environmental screening services available. ClearComm Technologies | 410-860-0500 | Salisbury, MD
Base station, delay filters for feed-forward amps, diplexers, custom up to 40 GHz, waveguide filter products 7-40GHz; cavity filter products include transmit and receive filters as well as duplexers and multiplexers covering the frequency range of 300 MHz to 6.0 GHz. CMT Filters | 916-631-4363 | Pollock Pines, CA
Cavity and waveguide filters, duplexers and filter-based assemblies for the wireless, commercial and military marketplaces. Coilcraft | 800-322-2645 | Cary, IL
RF, power inductors, EMI/RFI filter products, xDSL magnetics, transformers. Coleman Microwave | 800-563-3449 | Edinburg, VA
Diplexers, low pass, band reject, band pass, waveguide, coaxial, high power, harmonic, miniature filters. CommsAudit | +44 (0)124 225 3131 | Cheltenham, England
RF and digital equipment and subsystems for Defence, Telecommunications, Military, and broadcast communications applications. Frequency range 10 kHz to 60 GHz including digital control and digital signal processing (DSP). COTS, quadrature I/Q Receivers, multi-channel receiver systems, RF switching matrix, RF multicouplers, antenna matrices & multicoupler distribution units, masthead amplifiers, RF filters. Continental Microwave & Tool (now Cobham) | 603-775-5200 | Exeter, NH
Antennas, solid state switches, attenuators, microwave switch filter assemblies, high power switches, PIN-diode control components, and GaAs microwave devices, waveguide components, assemblies and subsystems, integrated assemblies. Corry Micronics | 724-940-7556 | Corry, PA
Dielectric resonators, bandpass filters, LC filters, VCOs, PLLs, patch antennas, power dividers, connectorized lumped element power dividers, directional couplers, isolators/circulators, high power hybrids, diplexers & multiplexers, attenuators, switches, cavity filters, waveguides, standard gain horn antennas. CTS Corporation | 574-293-7511 | Elkhart, IN
Bluetooth, ceramic duplexers, filters, terminators, DIP switches, modules (synthesizer, frequency translator, jitter attenuation, timing, clock generators, VCO's, high frequency VCXO's, VCSO's, IF filters), oscillators. Delta Microwave | 805-240-1044 | Oxnard, CA
Filters, diplexers, multiplexers, filter/amplifiers, variable attenuators, integrated assemblies, power combiners, waveguides. Product frequencies from 1 kHz to 50 GHz with RF power handling up to 25 kW. Electro-Photonics | 772-485-0927 |Palm City, FL
Global supplier of RF & Microwave components including SMT hybrid and directional couplers, wire bondable passive components. Very useful test boards for evaluating components saves valuable design and characterization time. Emicon Corporation | 915-590-0795 | El Paso, TX
Custom manufacturer of coils, powerline filters, signal line filters, EMI filters, low pass filters and inductors. EPCOS | 800-689-3717 | Iselin, NJ
Capacitors, SAW, inductors/EMC components, nonlinear resistors, ferrite components, surge everything RF | 312-436-0084
Find RF & microwave components, equipment and services - 216,401 products from over 1143 manufacturers listed in 275 categories. Download hundreds of vendor white papers. Test equipment amplifiers, antennas, attenuators, bias-Ts, & terminations, RF connectors & adapters, RF filters, power combiners, couplers, & dividers, RF switches, waveguide, Bluetooth & RFID. Eyal Microwave Industry | 972-9-7493184 | Israel
PIN switches, diodes, high power switches, limiters, power dividers, phase shifters, switched bank filters, converters. Filtek | 520-398-2856 | Tubac, AZ
Bandpass, lowpass, highpass and bandstop filters, power dividers, filters, couplers and beam forming networks.
Filtel | 450-455-6082 | Canada
Couplers, power dividers, isolators, coaxial & waveguide circulators. Filtronic Solid State | (now Teledyne Microwave)
650-962-6944 | Mountain View, CA
Synthesizers, YIG filters & oscillators, phase locked and free running DRO's, transceivers, converters, ferrites, microwave integrated assemblies, BAW delay lines. FSY Microwave | (now API Technologies) | 888-553-7531 | Columbia, MD
RF & microwave filters to 40 GHz. LC | cavity | ceramic | waveguide types. 20 years of design experience able to meet your custom specification. Guided Wave Technology | +45 20 88 58 30 | Denmark
Filter and Coupling Matrix Synthesis Software. Get an overview of main filter parameters in seconds, without complex circuit models and modeling. Coupling Matrix Synthesis™ software facilitates synthesis of N+2 coupling matrices for Chebyshev bandpass filtering functions, with arbitrary finite-position transmission zeroes, coupling matrix synthesis through topology matrix definition. Fast and accurate overview of IL, isolation, group delay and coupling coefficients versus filter order, return loss and transmission zero positions. ILSI America | 888-355-4574 | Reno, NV
Frequency control products - crystals, data clock oscillators, VCXO, VCO, TCXO, TCVCXO, OCXO, crystal filter, saw filter synthesizers. Integrated Microwave | 619-259-2600 | San Diego, CA
Bandpass, highpass, lowpass filters, ceramic resonators. Ion Beam Milling | 603-644-2326 | Manchester, NH
Since 1982 has manufactured thin film circuits for use in the microwave and photonics industries. Dry etch ion beam milling process to ensure a high level of repeatability. An array of standard products are ready to ship and we can create custom circuits to match your drawing. Ion Beam Milling also specializes in services. We can offer photolithography, milling, and/or dicing services to meet your needs. ISO 9001:2000 qualified. Isotec | 516-780-2766, USA | 82-2-2040-6176, Korea
Designs, develops and manufactures extensive line of RF/microwave connectors, cable assemblies, attenuators, terminations, couplers, filters, surge protectors, and LNAs. Low PIM designs available. Johanson Technology | 805-389-1166 | Camarillo, CA
LTCC chip antennas for Bluetooth, WLAN, 2.45 GHz ISM band, ceramic filters, diplexers, baluns, inductors, capacitors, couplers, laser trim, JTIsoft® modeling software. JQL Electronics | 888-236-9828 | Rolling Meadows, IL
Manufacturer of RF and microwave devices including filters, isolators & circulators, directional couplers, power divider/combiners, hybrid, termination and etc. Our R&D team provides outstanding services to quickly bring your product concepts into prototype, and turn the prototype into products. K&L Microwave | 410-749-2424 | Salisbury, MD
Filters, suspended substrates, waveguide. KDI-Triangle | (now MCE / KDI - Integrated Products) | 973-887-8100 | Whippany, NJ
Aeroflex | KDI-IP filter products for RF and Microwave filters are individual filter and multi-function assemblies for wireless base station front ends, point-to-point to microwave radios, amplifier, and other commercial applications. These include cavity types with metal or ceramic resonators, & printed filters such as bandpass, lowpass, bandreject, duplexer, triplexer & multiplexer. KMW | 800-832-0569 | Cerritos, CA
AMBA (Active Multi Beam Antenna System), amplifiers, arrestors, attenuators, combiner/dividers, connectors, couplers, duplexers, filters, isolators/circulators, phase shifters. KOA Speer Electronics | 814-362-5536 | Bradford, PA
Resistors, capacitors, 3-terminal EMI/RFI filters, circuit protection, inductors, integrated components. KR Electronics | 732-636-1900 | Avenel, NJ
All standard filter types - lowpass, highpass, bandpass, bandstop, equalizers, diplexers, duplexers, notch - and individually synthesized filters for special applications. State of the art computer synthesis, analysis and test methods are used to meet the most challenging specifications for military, commercial, medical, communication, radar, positive train control (PTC), and navigation. KVG Quartz Crystal Technology | +49-0-7263-648-126 | Neckarbischofsheim, Germany
Oven-controlled oscillators, low g sensitivity (LGS) technology, RF TCXOs and OCXOs, ceramic & crystal oscillators & filters. Surface mount & connectorized packages available. L-com Global Connectivity | 800-341-5266 | North Andover, MA
Manufacturer of cable assemblies, connectors, antennas, amplifiers, and other and other connectivity devices Lark Engineering | 949-240-1233 | San Juan Capistrano, CA
Lowpass, highpass, bandpass filters, diplexers. Linwave Technology Ltd | +44 1522 681811 | Lincoln, UK
RF and microwave design and manufacturing company with specialist knowledge in module and sub-system design. Our experience encompasses the consumer, industrial, automotive and defense market sectors. SATCOM BUC, SSPA, Military microwave sub modules. Lattice Semiconductor | 503-268-8000 | Hillsboro, OR
FPGA, FPSC, CPLD, SPLD, digital interconnects, programmable analog ICs, automotive temperature devices, military devices, programmable logic development tools, advanced packaging. Lorch Microwave | 800-780-2169 | Salisbury, MD
Cavity, waveguide, discrete, tunable, ceramic, wireless, tubular filters, integrated assemblies, mixers, phase comparators, phase shifters. Lotus Communication Systems | 888-236-8588 | Weston, MA
RF modular system components up to 20 GHz - amplifiers, filters, attenuators, limiters, oscillators, bias-Ts. COTS shielded enclosures w/SMA connectors for RF / electronics prototyping. Customization to your specification from prototype to production. Luxconn Technology | 82-2-2026-7500 | Seoul, Korea
Manufactures RF connectors, coaxial cable, and passive components including power splitters, power dividers, directional couplers, surge arrestors, terminators, duplexers, antennas. Maruwa America | 310-792-1105 | Torrance, CA
Ceramics capacitors, VCOs, resonators, multilayer ceramic substrates (HTCC/LTCC), thin-film substrates, EMI filters. Maxim Integrated Products | 800-998-9872 | Sunnyvale, CA
Amplifiers, comparators, analog switches, multiplexers, analog filters, linear and mixed-signal integrated circuits, power supplies, battery management, RTCs, clocks, oscillators, delays, counters, fiber optic ICs. MCLI | 800-333-6254 | St. Petersburg, FL
Power dividers, couplers, isolators, circulators, waveguide components, oscillators, filters, hybrids, attenuators, switches, terminations, amplifiers. MicroAxiom | 888-407-9626 | Poway, CA
Leading the way in filter innovation. Manufacture of high power, cavity, combline, interdigital, lumped element, LTCC modules, switches, amplifiers, switch filter banks, and GPS modules. MicroLab/FXR | 973-992-7700 | Livingston, NJ
Attenuators, bias tees, couplers, dc blocks, coaxial junctions, terminations, low pass filters, power splitters/dividers, tuners & line stretchers, waveguide dummy loads. Microwave Filter Company | 800-448-1666 | East Syracuse, NY
1 MHz to 50 GHz, HP, LP, BS, BR, multiplexer, tunable notch, high power, subminiature, waveguide, microstrip, lumped element. Microwavefilters & TVC | +39(0)292162703 | Cernusco sul Naviglio, Italy
Manufacturing of RF components including waveguide band and channel filters, duplexers, couplers, tapers, adapters, flanges, housings and cold plates for RF bridges, and also offers offering also electric testing, project consulting and problem solving. Mini-Circuits | 718-934-4500 | Brooklyn, NY
Attenuators, baluns, bias tee, cables (test quality), chokes, DC blocks, mixers, amplifiers, filters, line stretchers, modulators, oscillators, power combiners / couplers / splitters, switches, terminations, transformers. Surface mount, connectorized. Application (app) notes. MtronPTI | 800-762-8800 | Yankton, SD
Manufactures a complete range of frequency control products for commercial and military applications including crystal resonators, OCXOs, TCXOs, VCXOs, monolithic and discrete crystal filters, LC filters, and RF subassemblies. Murata Electronics | 800-241-6574 | Smyrna, GA
Chip multi-layer (1.0 2.5 GHz), chip dielectric (2450 GHz, Bluetooth), surface mount capacitors, thermistors/resistors, coil (inductors)/delay lines, noise suppression products/EMI filters, resonators, piezoelectric sound components, coaxial connectors, antenna/duplexers, isolators/circulators, PLL modules, VCOs, TCXO, RF diode switches, DC-DC converters, sensors. Narda Microwave East | 631-231-1700 | Hauppauge, NY
Filters, isolators, power combiners, couplers, RF mechanical switches and PIN diode switches. Nortec RF | 856-793-9255 | Mount Laurel, NJ
RF/microwave power combiners/dividers, unidirectional and bidirectional couplers, hybrid couplers, filters, and power amplifiers. New products added on regular basis. NTK Technologies | 408-727-5180 | Santa Clara, CA
Packages - LTCC, LCC, CPGA, AlN, CGFP, FP, side braze hybrid, thin film, flip chip, organic flip chip, microwave. Ceramic directional couplers, filters, diplexers, antennas, switch modules, resonators and ultrasonic sensors. Omniyig | 408-988-0843 | Santa Clara, CA
Manufacturer of band reject, bandpass Yig filters, Yig oscillators and Yig multipliers with and without integrated analog or digital drivers, comb generators with and without integrated input power amplifiers, various types of detectors and limiters. Oscilent Corporation | 949-252-0522 | Irvine, CA
Oscillent refuses to pay their final bill to RF Cafe. Panasonic | 201-348-7000 | Secaucus, NJ
Surface mount capacitors, directional couplers, antenna switches, SAW filters, attenuators, power dividers, duplexers, transformers, inductors, coils, batteries. Picosecond Pulse Labs (now Tektronix) | 303-443-1249 | Boulder, CO
Amplifiers, drivers, attenuators, baluns, transformers, bias tees, comb generators, custom pulse generators, DC blocks, driver/controller modules, ECL/PECL terminators, edge compressors, impulse forming networks, low-pass filters, power dividers, pulse generators, sampler modules TDR/TDT instruments. Planar Monolithics Industries | 301-662-5019 | Frederick, MD
PMI designs, develops, manufactures, tests, and markets hybrid RF/microwave and monolithic integrated circuits (MIC/MMIC) and components hybrid MIC/MMIC supercomponents and subsystems. Pole Zero | 513-870-9060 | West Chester, OH
Modular digitally tuned RF filters and preselectors. Q Microwave | 619-258-7322 | El Cajon, CA
Custom & standard filters, integrated microwave assemblies, design tools, lab support services. QuinStar Technology | 310-320-1111 | Torrance, CA
Designs and manufactures millimeter-wave products for communication, scientific, and test applications including millimeter-wave products, microelectronic assembly, rapid prototyping, and mass customization. Amplifiers, receivers, Oscillators, switches, attenuators, circulators & isolators, filters, waveguide, antennas, and phase shifters, and transceiver & radar subsystems are offered. Ray Micro Devices | 717- 266-8666 | York, PA
State-of-the-art and highly scalable design and fabrication solutions for Microwave, Telecom and Satellite Communications. RMD's expertise lies in the development of hardware products for the 10-40 GHz spectrum. RCD Radiokomunikace | +420-466-415-755 | Česká Republika
Design, manufacture, and test high-quality RF components and systems - attenuators, couplers, dividers, filters, amplifiers. Custom RF or mechanical designs including high port-to-port isolation requirements, low ohmic losses, high power, and low PIM levels. 70 MHz – 5 GHz. Reactel | 301-519-3660 | Gaithersburg, MD
Design and manufacture of RF and Microwave filters, diplexers, and sub-assemblies. Continuous process of research and development has led to a full line of filters of all types including generally known tubular, LC, cavity, and waveguide designs, as well as state of the art high performance suspended substrate models. Latest in CAD/CAM methods and equipment in all design and manufacturing processes. RF Microwave Design Ltd | +44 (0)1626 835269 | UK
Custom, semi-custom and standard passive microwave components. Diplexers, filters and antennas designed and tested. A complete design, development and validation service to the RF and microwave industry. RF Monolithics. - RFM (now muRata) | 800-704-6079 | Dallas, TX
Offers a broad range of wireless solutions, from comprehensive industrial wireless sensor networks to high performance RF components including SAW resonators, narrow band filters, RF and IF filters, oscillators, clocks & crystals, RFIC and SAW based radios, RF modules and standalone radios, M2M. RLC Electronics | 914-241-1334 | Mount Kisco, NY
Filters, couplers, coaxial switches, attenuators, power dividers, terminations, bias tees, DC blocks. RS Microwave | 201-492-1207 | Butler, NJ
Filters, multiplexers, subassemblies. RTx Technology Co., Ltd | +82-31-743-6275 | South Korea
Filters, duplexers, multiplexers (ceramic/cavity), VCOs & PLL synthesizers, isolators & circulators, up/down converters, combiners & dividers, directional couplers, SAW devices, attenuators, terminators. Sage Labs - Filtronic | (now API Technologies) | 508-653 0844 | Natick, MA
Power dividers, couplers, hybrids, filters, rotary joints, mixers, phase shifters. Salisbury Engineering | (now API Technologies) | 888-553-7531 | Delmar, DE
Custom integrated microwave assemblies, tuners, synthesizers, filters, reference oscillators, harmonic generators. Call to discuss with an engineer your microwave component or supercomponent needs. Samsung Electro Mechanics | 408-544-5262 | San Jose, CA
Ceramic filters for base stations, repeater from 400 MHz to 5 GHz. Saw filters, VCOs, and TCXOs. Sawtek | (now a division of TriQuint Semiconductor) | 407-886-8860 | Apopka, FL
RF, IF filters, duplexers, base stations, wireless LAN. Spectrum Control | (now API Technologies) | 866-281-0989 | Fairview, PA
Connectors - circular, D-subminiature, DIN, terminal blocks, plugs and jacks, coaxial/RF. EMI/RFI filtered feedthrough connectors Syfer Technology | +44 1603 723300 | Norfolk, Suffolk, England
Syfer has 25+ years experience in manufacturing ceramic capacitors, both SMD and thru-hole EMI filters and EMI Power Filters. Tai-Saw Technology | 886-3-4690038 | Taiwan
RF, IF, crystal filters, SAW filters, crystal resonators, crystal oscillators, VCOs, TCXOs. 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. Teledyne KW Microwave | 858-842-2993 | Poway, CA Filters, multiplexers, diplexers, multipliers, solid state switches, switch filters, low noise amplifiers, preamplifiers, coaxial switches, ferrite circulators and isolators, integrated subsystems covering the frequency range 5 MHz to 40 GHz. TELSA | +390354876000 | Osio sotto (BG) Italy
Basestation antennas, combiners, couplers, circulators, filters, duplexers, power splitters and components for the air traffic control, private mobile radio, cellular, wireless communications and tactical markets. Tiger Micro-Electronics Institute | 510-635-4270 | Oakland, CA
Filters, couplers, power divider/combiners, mixers, modulators, switches, isolators, circulators, phase shifters. Token Passive Components | +886-2-2981 0109 | Taiwan
Ceramic resonators, filters, dielectric patch antennas, resistors. Toko America | 847-297-0070 | Mt. Prospect, IL
Filters, baluns, inductors, antennas, semiconductors, amplifiers, A/D converters. Trans-Tech | 301-695-9400 | Adamstown, MD
Resonators, bandpass filters, garnets, ferrites, dielectrics, substrates. Trilithic | 800-344-2412 | Indianapolis, IN
Attenuators, filters, switches, terminations, emergency alert systems. Triquint Semiconductor | 503-615-9000 | Hillsboro, OR
Wireless, telecom and millimeter amplifiers, GaAs integrated circuits and transistors. SAW filters. TTE | 800-776-7614 | Los Angeles, CA
Bandpass, lowpass, highpass filters, diplexers, multiplexers, cases, balun, isolation & matching transformers. Tusonix | www.tusonix.com | 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. Ultra-Crea Oy | +358 50 444 9100 | Finland
Specializes in the design, development and manufacture of custom designed/specialty antennas and RF filters from 10 MHz to 6 GHz. US Microwaves | 408-970-9680 | Santa Clara, CA
Supplies custom and standard microwave thin film circuits, thin film components and semiconductors for analog and digital multi-chip module circuits, medical, military and commercial RF & microwave, fiber optic and optoelectronics, satellite, video and wireless communication applications. UTE Microwave | 732-922-1009 | Asbury Park, NJ
Circulators, isolators, ISO-adapters, filters. Vanlong Technology | 262-534-2888 | Rochester, WI
SAW resonators, SAW filters, ceramic products, oscillators. Vectron International | 888-328-7661 | Hudson, NH
Crystals, oscillators, SAW filters. Ventronics USA | 908-272-9262 | Kenilworth, NJ
Resistors, varistors, thermistors, diodes, rectifiers, quartz crystals, oscillators, filters, switches, coils, EMI filters, microcircuits, capacitors, battery packs, inductors, batteries, transformers, LED/LCD, line cords, piezoelectric devices, cable assemblies, relays, blowers, fans, power supplies, thermal cutoffs, PCBs, potentiometers, delay lines, transducers, chokes. Wainwright Instruments | +49 (0) 8152-918230 | Germany
Lowpass, highpass, bandpass, notch filters, diplexers & multiplexers. Ye Eun Tech | +82-31-459-0960 | Gunpo, Kyunggi, Korea
Coaxial (RF) cable assemblies, adapters, filters, power splitters, and multiplexers. |
