The companies listed here can supply your needs for any type of attenuator, be it fixed, variable, or programmable.
They provide not only a stock of off-the-shelf models, but can also design and manufacture custom models for meeting
specialty decibel values, form factor, power handling, or other unique parameters.
One important thing to keep in mind is that specified values for attenuation are only guaranteed at 50+j0 ohms,
or whatever the characteristic impedance of the attenuator model happens to be (50 and 75 ohms most common). The
farther away from the characteristic impedance the connected ports are, the farther from the spec the attenuation
value will be.
I provide an online attenuator calculator
Please consider contacting RF Cafe advertisers first for your needs.
Attenuator Design Data
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Aeroflex KDI, Inc
| aeroflex.com/ams/kdi-rp/micro-kdi-rp-prods.cfm | 973-887-5700 | Whippany, NJ
Attenuators, phase shifters, digital
time delay units, LNA's, switches, modulators, dividers combiners & couplers, ferrites, levelers, duplexers,
amplifiers, resistors, terminations.
Bird Electronic Corp | bird-technologies.com | 440-248-1200 | Cleveland, OH
High & low
power, DC - 3 GHz, fixed, broadcast, wireless, filters, miniature coaxial couplers, combiner/divider 50 Ohm selector
BroadWave Technologies | broadwavetechnologies.com | 317-346-6101 | Franklin, IN
attenuators, power combiners, power dividers, power couplers, terminations, high power, 1-1500 Watts, connectors,
Channel Microwave (now Smiths Microwave)
channelmicrowave.com | 805-482-7280 | Camarillo,
Coaxial and waveguide isolators, circulators, ISO-adapters, integrated assemblies, filters, terminations.
Charter Engineering | ceiswitches.com | 727-549-8999 | Largo, FL
attenuators, couplers terminations, isolators, circulators, power dividers.
Corry Micronics | cormic.com | 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.
Cougar Components (now Teledyne Cougar)
cougarcorp.com | 408-522-3838 | Sunnyvale, CA
RF and microwave cascadable amplifiers and subsystems in 100 kHz to 12 GHz range. Detectors, limiters, limiting
amplifiers, attenuators, AGC amplifiers, oscillators w/MMIC amplifiers.
Diablo Industries (now DITF - Interconnect Technology)
ditf.com | 775-782-1041 | Minden,
Produces thin film sputtered and etched circuits, fabricates RF microwave components such as mixers, attenuators,
combiners, amplifier substrates and filters. We are a build to print service and can fabricate in volumes; servicing
the microwave, optronics, aerospace markets.
DS Instruments | dsinstruments.com | 805-242-6685 | San Luis Obispo, CA
RF & microwave
test equipment and specialized hardware in smaller form-factors and at lower cost than previously available. All
hardware design, firmware development, and assembly is based in the USA. Current offerings include tracking and
microwave signal generators, microwave digital step attenuators, and in the near future a compact signal power meter
and frequency counter capable of reaching nearly 8 GHz.
Dynamic Signal (now National Instruments)
800-982-4064 | Medfield, MA
RF connectors: BNC-SMA-SMB-F-N-UHF-MCX-TNC; Custom cable assemblies: mix and match
lengths/connectors; Adapters | terminators | attenuators; Single mode & multimode fiber optic cables: LC-SC-ST-MTRJ;
Bulk coax cable: RG6-RG8-RG58-RG59-RG142-RG213-RG223-RG400; cable tools & accessories.
EMC Technology Florida RF Labs | emc-rflabs.com | 800-544-5594 | Stuart, FL
hybrid couplers, thin film resistive products.
FM Ingenierie (now Ormelabs)
ormelabs.com/fr | +33 951486698 | France
frequency synthesizers, RF filters, ISM-band ID systems, custom design, Smith Chart software.
Herley | herley.com | 717-735-8117 | Lancaster, PA
Attenuators, modulators, power dividers,
oscillators, synthesizers, phase shifters, switches.
High Sierra Microwave | hsmicrowave.com | 530-644-3393 | Camino, CA
Designs and builds PLL
signal sources, up/down converters, low noise amplifiers, and comb marker generators (weak signal sources). Also
provides RF/microwave test/measurement services, such as phase noise measurements to 40 GHz.
Hittite Microwave Corp | hittite.com | 978-250-3343 | Chelmsford, MA
frequency multipliers, mixers, modulators, prescalers, switches, VCOs.
Instruments for Industry (IFI) | ifi.com | 631-467-8400 | Ronkonkoma, NY
such as tetrode tubes, TWTs, klystrons, and solid state devices. Standard horn antennas and TEM cells.
Ion Beam Milling, Inc | ionbeammilling.com | 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.
Link Microtek | linkmicrotek.com | 44 (0)1256 355771 | Basingstoke, Hampshire, UK
rotary joints, OMTs, attenuators, TEM cells, filters, couplers, transitions, millimetre wave components, adaptors,
terminations and custom waveguide assemblies. DC to 40 GHz.
LUXCONN Technology | luxconn.co.kr | 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.
M/A-COM (now Cobham)
cobham.com | 800-366-2266 | Lowell, MA
and high-volume manufacturer of RF, microwave and millimeter wave semiconductors, components and technologies including
diodes, semiconductors, transistors, passives, blocks, substrates.
MicroLab/FXR | microlab.fxr.com973-992-7700 | Livingston, NJ
Attenuators, bias tees, couplers,
dc blocks, coaxial junctions, terminations, low pass filters, power splitters/dividers, tuners & line stretchers,
waveguide dummy loads.
Micronetics (now Mercury Systems, Inc.)
micronetics.com | 603-883-2900 | Hudson, NH
equipment, noise sources, voltage controlled oscillators, switches, limiters, phase shifters, attenuators.
Microtech, Inc | microtech-inc.com | 203-272-3234 | Cheshire, CT
Waveguide rotary joints,
bends, straight, twists, adapters, couplers, horns, terminations, tees.
Microwave Resources, Inc | microwaveresourcesinc.com | 909-627-4125 | Chino, CA
attenuators, circulators, isolators, frequency multipliers, waveguide couplers, mixers, detectors, filters, pin
Midwest Microwave (now Emerson Network Power)
| 734-429-4773 | Saline, MI
Attenuators, terminations, DC blocks, couplers, power dividers, equalizers,
phase shifters, adapters, cable assemblies, connectors - SMA, BMA, N Type, 7 mm, 3.5mm, QPL/DSCC approved products,
tools, gauges, guides.
Miteq | miteq.com | 631-436-7400 | Hauppauge, NY
Amplifiers, mixers, frequency multipliers,
passive power components, solid-state switches, attenuators, power dividers, RF & IF signal processing components,
oscillators, frequency synthesizers, integrated multifunction assemblies, fiber optic products, up/downconverters,
test translators, IF/video equalizers, redundancy switchover units, video modulators and modems.
Nikkohm Co., Ltd | nikkohm.com | +81-176-53-2105 | Misawa, Aomori, Japan
thin film, precision chip, RF termination, attenuator, power, TO220, TO247, TO126, wire wound, metal housed, current
detect, shunt, thermopiles.
Pasternack Enterprises, Inc | pasternack.com | 866-727-8376 | Irvine, CA
Amplifiers to 2
GHz, attenuators 1 - 1000 W DC - 40 GHz, circulators/isolators 1 - 26.5 GHZ w/SMA connectors, combiners/dividers
2 - 12 way 1 MHz - 18 GHz, couplers low & high power 0.5 - 18 GHz, switches manual & diode DC - 18
GHz, terminations 1/2 - 100 W DC-40 GHz, waveguide 1.70 - 40 GHz.
Planar Monolithics Industries | pmi-rf.com | 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.
Renaissance Electronics Corp | rec-usa.com | 978-772-7774 | Harvard, MA
receiver multi-couplers, isolators, circulators, directional couplers, power dividers/combiners, terminations, DC-26.5
GHz, coaxial, multi-position, x-fer.
Res-net Microwave | res-netmicrowave.com | 727-536-7861 | Largo, FL
attenuators, RF terminations, and microwave resistors for the RF and microwave industries.
Response Microwave | responsemicrowave.com | 978-772-3767 | Devens, MA
Manufacturer of drop-in
and connectorized hybrids & couplers, combiners & dividers, filters & diplexers, isolators &
circulators, coaxial & optical attenuators & adaptors, terminations, surge protection, delay lines, connectors,
cable & cable assemblies, laser diodes, and custom assemblies.
RF & Connector Technology | rf-ct.com | +82 505 274 0002 | Suwon, Kyounggi ,Korea
connector, cable assembly & RF passive components.
RFHIC Corporation USA | rfhic.com/eng | 919-342-7099 | Cary, NC
CATV hybrid line amplifiers,
broadcasting amplifiers, FTTH amplifiers, digital TV application, MMIC (GaN, GaAs), high power transistors (GaN),
low noise, wideband, & radar pallet amplifiers, PLLs, mixers, directional couplers.
RF-Lambda | rflambda.com | 613-592-6858 | Canada
Couplers, circulators, isolators, mixers,
attenuators, coupler, power amplifiers, LNA, VCO, switches, oscillators, connectors, adapters.
Spinner | spinner-group.com | 770-263-6326 | Norcross, GA
Coaxial connectors, cable assemblies,
directional couplers, phase shifters, filters, stub tuners, DC breaks, coaxial loads and attenuators, waveguide
components, coaxial and waveguide switches, lightning protectors, audio/video broadcast (analog and digital) components,
accessories for network analyzers including calibration kits, gauges, articulated lines, push-on connectors, connector-savers.
State of the Art | resistor.com | 800-458-3401 | State College, PA
Thick, thin film chip,
surface mount, high reliability, 50 ohms, up to 20 GHz resistors, coplanar chip attenuators, thick film jumpers.
Suncoast Microwave, Inc | suncoastmicrowave.com | 727-573-1280 | Clearwater, FL
cost effective waveguide components including flexible, terminations, adapters, and couplers.
US Microwaves | usmicrowaves.com | 408-970-9680 | Santa Clara, CA
Products include attenuators,
diodes, inductors, substrates, capacitors, dividers, resistors, terminations, couplers, filters, MMICs, LDOs.
Vector Telecom Pty Ltd | vectortele.com | +61 3 9607 8357 | Melbourne , Australia
components and assemblies, coaxial components and antennas.
vidaRF | vidarf.com | 877-777-8432 | Lancaster, MA
Designs and manufactures reliable and
cost-effective RF | Microwave components including connectors, adapters, terminations, cable assemblies, antennas,
converters (baluns), surge protectors.
Vidyut Yantra Ydyog | vyu-microwave.com | 91 1232 242223 | India
Manufacturer of microwave
and millimeter waveguide components, antennas, & attenuators.