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.
| 714-918-4752 | Costa Mesa, CA
Manufacturer of high quality RF and IF Surface acoustic
Wave (SAW) filters, resonators, and Voltage Controlled Oscillators (VCO).
| 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,
| 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,
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.
| 805-482-7280 | Camarillo, CA
Coaxial and waveguide isolators, circulators, ISO-adapters,
integrated assemblies, filters, terminations.
| 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.
| 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.
| 800-563-3449 | Edinburg, VA
Diplexers, low pass, band reject, band pass, waveguide,
coaxial, high power, harmonic, miniature filters.
+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,
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
| 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.
| 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.
| 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.
| 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.
| 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
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
Couplers, power dividers, isolators, coaxial & waveguide circulators.
Filtronic Solid State
| (now Teledyne Microwave)
650-962-6944 | Mountain View, CA
filters & oscillators, phase locked and free running DRO's, transceivers, converters,
ferrites, microwave integrated assemblies, BAW delay lines.
| (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.
| 888-355-4574 | Reno, NV
Frequency control products - crystals, data clock oscillators,
VCXO, VCO, TCXO, TCVCXO, OCXO, crystal filter, saw filter synthesizers.
| 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.
| 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.
| 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.
| 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.
| 410-749-2424 | Salisbury, MD
Filters, suspended substrates, waveguide.
| (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
KOA Speer Electronics
| 814-362-5536 | Bradford, PA
Resistors, capacitors, 3-terminal EMI/RFI filters, circuit
protection, inductors, integrated components.
| 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
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
| 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.
| 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.
| 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.
| 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.
| 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.
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.
| 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.
| 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.
| 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.
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
| 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.
| 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,
Picosecond Pulse Labs (now Tektronix) | 303-443-1249 | Boulder,
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.
| 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.
switches, attenuators, circulators & isolators,
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.
| +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.
| 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.
| (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.
| (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
| +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
| 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
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.
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,
| 847-297-0070 | Mt. Prospect, IL
Filters, baluns, inductors, antennas, semiconductors,
amplifiers, A/D converters.
| 301-695-9400 | Adamstown, MD
Resonators, bandpass filters, garnets, ferrites, dielectrics,
| 800-344-2412 | Indianapolis, IN
Attenuators, filters, switches, terminations, emergency
| 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
| +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.
| 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.
| 732-922-1009 | Asbury Park, NJ
Circulators, isolators, ISO-adapters, filters.
| 262-534-2888 | Rochester, WI
SAW resonators, SAW filters, ceramic products, oscillators.
| 888-328-7661 | Hudson, NH
Crystals, oscillators, SAW filters.
| 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.
| +49 (0) 8152-918230 | Germany
Lowpass, highpass, bandpass, notch filters, diplexers &
Ye Eun Tech
| +82-31-459-0960 | Gunpo, Kyunggi, Korea
Coaxial (RF) cable assemblies, adapters,
filters, power splitters, and multiplexers.