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
Aeroflex KDI | 973-887-5700
| Whippany, NJ
Attenuators, phase shifters, digital time delay units, LNA's, switches, modulators,
dividers combiners & couplers, ferrites, levelers, duplexers, amplifiers, resistors,
| 1-800-Anritsu (1-800-267-4878) | Allen, TX
Attenuators & terminations; coaxial cables, connectors & adapters; o-scopes;
power meters & sensors; signal generators; antenna, signal, spectrum, &
vector network analyzers (VNAs); calibration kits; Bluetooth & WLAN testers;
PIM testers; amplifiers; power dividers; antennas.
Corp | 440-248-1200 | Cleveland, OH
High & low power, DC - 3 GHz, fixed, broadcast, wireless, filters, miniature
coaxial couplers, combiner/divider 50 Ohm selector switches.
Technologies | 317-346-6101 | Franklin, IN
Adapters, attenuators, power combiners, power dividers, power couplers, terminations,
high power, 1-1500 Watts, connectors, adapters.
| 800-399-6891| Allen, TX
Stocks various RF and microwave coaxial components including attenuators, adapters,
cable assemblies, terminations, power dividers, and more.
(now Smiths Microwave) | 805-482-7280 | Camarillo, CA
Coaxial and waveguide isolators, circulators, ISO-adapters, integrated assemblies,
| 727-549-8999 | Largo, FL
Electromechanical switches, attenuators, couplers terminations, isolators, circulators,
| 610-844-6421 | Malvern, PA |
N-way dividers/combiners (reactive & resistive), high power combiners, directional
couplers, 90° & 180° 3 dB hybrids couplers, RF switches, phase shifters,
limiters, detectors, bias Tees, DC blocks.
ConductRF | 1-978-374-6840 | Methuen, MA
RF connectors and cables DC to 110 GHz, including RF test, internal system
cables, low PIM, high power, phase matched & more. Custom connector design capability,
too. VNA cables including TESTeCON. Formable semi-rigid and hand-formable solutions
up to 60 GHz. Flexible cables: RG & LMR, high flex double and triple shielded
options. D38999 Mil Spec. Fixed attenuators. ITAR Registered.
| 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.
MMIC (now QORVO)| 978-467-4290 | Westford, MA
Fabless RF and microwave MMIC designer of microwave circuits to solve various
size, weight, performance, and cost (SWaP-C) challenges throughout the microwave
signal chain. Off-the-shelf MMICs including amplifiers, mixers, attenuators, phase
shifters, and switches. Over 25 years combined experience in MMIC chips for millimeter
wave, point-to-point radio, VSAT, WLAN, and cellular systems as well as general
| 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 | 800-544-5594 | Stuart, FL
Coax, cable, hybrid couplers, thin film resistive products.
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.
(now Ormelabs) | +33 951486698 | France
Programmable attenuators, frequency synthesizers, RF filters, ISM-band ID systems,
custom design, Smith Chart software.
Herley | 717-735-8117
| Lancaster, PA
Attenuators, modulators, power dividers, oscillators, synthesizers, phase shifters,
High Sierra Microwave
| 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
| 978-250-3343 | Chelmsford, MA
Amplifiers, attenuators, frequency multipliers, mixers, modulators, prescalers,
Components | 973-335-6550 | Boonton, New Jersey
Design & manufacture 2- thru 64-way RF power splitters / combiners from our
Boonton, NJ, facility. N, TNC, BNC, SMA, QMA, RP-SMA connectors. 10 MHz through
6.0 GHz. Optimized specs for Public Safety Band, Cell, GSM 900 / 1800, PCS, UMTS,
GPS, L Band, W-CDMA-3G, TETRA, IEEE802.11 b/g, UHF RFID, ISM, Wi-Fi, WiMAX and LTE
wireless. Bias T's. Customization available. All products in stock. 5 year warranty.
Integrated Device Technology
(IDT) | 800-223-1366 | San Jose, CA
System-level solutions that optimize applications with products in RF, timing,
wireless power transfer, serial switching, interfaces and sensing solutions are
among the company's broad array of complete mixed-signal solutions for the communications,
computing, consumer, automotive and industrial segments. These products are used
for development in areas such as 4G infrastructure, network communications, cloud
datacenters and power management for computing and mobile devices.
Innovative Power Products
(IPP) | 631-563-0088 | Holbrook, New York
RF & microwave high power, broadband couplers, combiners, baluns, resistors,
terminations and attenuators. Product integration, custom configurations, custom
resistor assemblies, contract manufacturing, engineering design.
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.
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
| 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.
| 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.
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
| 44 (0)1256 355771 | Basingstoke, Hampshire, UK
Horn antennas, rotary joints, OMTs, attenuators, TEM cells, filters, couplers,
transitions, millimetre wave components, adaptors, terminations and custom waveguide
assemblies. DC to 40 GHz.
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
| www.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,
Cobham) | 800-366-2266 | Lowell, MA
Developer and high-volume manufacturer of RF, microwave and millimeter wave semiconductors,
components and technologies including diodes, semiconductors, transistors, passives,
| 866-444-6322 | Denville, NJ
RF & microwave components for in-building, satellite, radar, radio, telemetry,
mobile radio, aviation & ATC. Attenuators, directional & hybrid couplers,
isolators & circulators, power dividers & combiners, loads, DC blocks, bias-Ts
and adapters & cables.
| 973-992-7700 | Livingston, NJ
Attenuators, bias tees, couplers, dc blocks, coaxial junctions, terminations,
low pass filters, power splitters/dividers, tuners & line stretchers, waveguide
Mercury Systems) | 603-883-2900 | Hudson, NH
Test equipment, noise sources, voltage controlled oscillators, switches, limiters,
phase shifters, attenuators.
| 203-272-3234 | Cheshire, CT
Waveguide rotary joints, bends, straight, twists, adapters, couplers, horns,
Resources | 909-627-4125 | Chino, CA
Amplifiers, attenuators, circulators, isolators, frequency multipliers, waveguide
couplers, mixers, detectors, filters, pin switches, adapters.
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.
| 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.
Miteq | 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.
| +82-32-822-3290 | Incheon, Korea
Manufacturer of RF attenuators and terminations, coaxial connectors, adapters,
and cable assemblies, DC blocks, surge arrestors, power combiner / dividers, and
Nikkohm Co., Ltd
| +81-176-53-2105 | Misawa, Aomori, Japan
Resistors, precision thin film, precision chip, RF termination, attenuator, power,
TO220, TO247, TO126, wire wound, metal housed, current detect, shunt, thermopiles.
| 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.
| 858-731-9400 | San Diego, CA
Fabless provider of RFICs leveraging the company's patented UltraCMOS® technology,
an advanced form of SOI that enables the design, manufacture and integration of
multiple RF, analog and digital functions onto a single chip.
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
QORVO | 833-641-3810
| Greensboro, NC
RFICs and packaged modules used in cellular networks and mobile phones, for wireless
connectivity such as wireless LAN, GPS and Bluetooth, cable modems and cable TV
infrastructure, applications including military radar. GaAs- and GaN-based power
amplifiers, filters, switches, and FEMs used in smartphones, WiFi wireless infrastructure
| 857-499-0071 | Cohasset, MA
Millimeter-wave waveguide components including attenuators, detectors, diplexers,
power amplifiers, mixers, isolators & circulator, multipliers, antennas, switches,
probe adapters, terminations, and filters. Waveguide sections include straight,
bends, twists, transitions, and adapters. Patented "GuideLock" connector eliminates
screws. Cryogenic components available. Designed and manufactured at their Massachusetts
| 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, filters,
and phase shifters, and
transceiver & radar subsystems are offered.
| +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.
Corp | 978-772-7774 | Harvard, MA
Transmitter combiners, receiver multi-couplers, isolators, circulators, directional
couplers, power dividers/combiners, terminations, DC-26.5 GHz, coaxial, multi-position,
| 727-536-7861 | Largo, FL
Complete line of precision RF & microwave components including attenuators,
terminations, resistors, and diode detectors for commercial, military, and space
applications. Products range from the small flange type to large 2,000 watt connectorized
power attenuators and/or terminations at frequencies up to 26.5 GHz. In-house
photo etch and laser trim capability.
| 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
| +82 505 274 0002 | YoungTon Suwon, Korea
Coaxial connectors & adapters, cable assemblies, RF attenuators, terminations,
couplers, power couplers & dividers, DC blocks, surge arrestors, antennas.
RFHIC Corporation USA
| 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.
| 888-443-3427 | Denver, CO
Launched in 2017 by the founder of Pasternack Enterprises. RF coaxial connectors &
adapters, coaxial cable & cable assemblies, surge protectors, attenuators. Items
added daily. Free shipping on orders over $99. Same day shipping on orders received
by 3 PM MT.
| 408-433-1941 | San Jose, CA
High reliability brazed high power resistors, high power attenuators and high
power terminations in aluminum nitride (AlN), alumina & beryllium oxide (BeO)
substrates for the Microwaves & RF applications. 100% manufactured in USA.
| 613-592-6858 | Canada
Couplers, circulators, isolators, mixers, attenuators, coupler, power amplifiers,
LNA, VCO, switches, oscillators, connectors, adapters.
| 603-624-8311 | Manchester, NH
Prototype builds and design while handling volume production runs for the RF/microwave,
military, space, homeland security, optical, medical device, commercial-wireless
markets. Manual and fully automatic assembly. Also manufactures PIN, limiter, beam
lead, and Schottky diodes, chip capacitors and attenuators, and printed spiral inductors.
| 781-376-3000 | Woburn, MA
RF amplifiers, attenuators, circulators, demodulators, detectors, diodes, directional
couplers, FEMs, RF subsystems, isolators, mixers, modulators, optoisolators, phase
shifters, PLLs-synthesizers-VCOs, & more.
| 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
| 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.
| 727-573-1280 | Clearwater, FL
Quality, cost effective waveguide components including flexible, terminations,
adapters, and couplers.
| 408-970-9680 | Santa Clara, CA
Products include attenuators, diodes, inductors, substrates, capacitors, dividers,
resistors, terminations, couplers, filters, MMICs, LDOs.
| www.+61 3 9607 8357 | Melbourne , Australia
Waveguide components and assemblies, coaxial components and antennas.
vidaRF | www.877-777-8432
| Huntersville, NC
Offering High performance isolators, circulators, power dividers, couplers, RF
connectors, adapters, custom cable assemblies, attenuators, and terminations. Custom
designs available. In-stock items shipped within 24 hours.
Vidyut Yantra Ydyog
| 91 1232 242223 | India
Manufacturer of microwave and millimeter waveguide components, antennas, &
| South Korea | +82-070-7118-0705
Coaxial connectors and adapters, terminations, attenuators, cable assemblies,
and accessories for test applications. The coaxial-to-planar
useful from DC-20 GHz. VNA calibrator kits and VNA auto-calibrator.