Attenuators, Bias-Ts, & Terminations
Fixed | Variable | Programmable)
Manufacturers & Services

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 here.

Please consider contacting RF Cafe advertisers first for your needs.

Attenuator Design Data

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RF and microwave filters for commercial and defense applications Anatech Electronics designs and manufactures the industry's widest range of RF and microwave filters at frequencies up to 40 GHz, as well as power dividers, directional couplers, and many other product types. We specialize in standard and custom designs for commercial wireless, public safety, satcom, and defense applications, and we can meet stringent military environmental specifications. Contact us with your custom requirements!     973-772-4242 anatechelectronics.com Check out our product capabilities    Bandpass Filters    Lowpass Filters    Highpass Filters    Duplexers    Triplexers Multiband Multiplexers Power Dividers Directional Couplers Attenuators Terminations Buy standard models fast... online. We have hundreds of standard products available for immediate delivery at our Web store. Check them out at AMCrf.com!   Dow-Key Microwave Ventura, CA Tel: 805-650-0260 Dow-Key Microwave is the world's largest manufacturer of electro-mechanical RF switches. We are AS9100/ISO-9001 certified and committed to providing unparalleled customer service, competitive pricing, on-time delivery and products that are distinguished by quality and reliability. Dow-Key offers the largest switch product line in the world with over 10,000 unique configurations. Our Products Include: • Coaxial Switches - SPDT,      DPDT, Transfer, Manual,      Fail-Safe, NO, Multi-Position • Fiber Optics Matrices - N x M • Electro-Mechanical & Solid    State Switch Matrices -      Multi-Pole, Multi-Throw • Programmable Attenuators -      Up to 127 dB, 30 - 3000 MHz • Programmable Delay Lines -      10 ps Step • Space Qualified Switches -     2/3 Switch, SPDT, DPDT, Transfer,     High Power • Waveguide Switches - SPDT, DPDT, X-fer    For our latest specials, please check our    Excess Inventory & Out the Door in 24   Lengua Española Fairview Microwave Inc. 1130 Junction Dr., Allen, TX Tel: 1-800-715-4396 Fax: (972) 649-6689 Globally renowned as a leading provider of high-quality RF and microwave components, same day shipping, and no minimum purchase requirements. RoHS Compliant Products Available APC7, BMC, BMA, C, HN, MCX, MHV, MMCX, QMA, SC, SMA, SMB, SMC, SMP, SSMA, SSMB, SSMC, N, TNC, 7-16, 3.5/2.92/2.4/1.85mm, UHF, ZMA                 • Adapters • Attenuators • Connectors • Couplers • • DC Blocks • Detectors • Limiters • Isolators • • Circulators • Mixers • Phase Shifters • • Power Dividers • Rotary Joints & Switches • • Terminations • Times Microwave Products • • Waveguide Components SMA, RF, & Microwave Cables in various lengths and types are available. Custom Cables Assemblies! • RF Torque Wrenches • • SMP, GPO, & Mini-SMP Tools • • Crimp Tools •   JFW Industries Indianapolis, IN Toll-Free: 877-887-4539 JFW Industries is a world leader in designing and manufacturing of passive RF components and application specific test systems. These components include attenuators, RF switches, and specialized test systems for use in the cellular, telecom, OEM test equipment, medical, automotive, defense, and automated test systems markets. Application specific designs are the cornerstone of JFW's continuous technical advances in RF components. - JFW is an ISO 9000:2000 registered company -   • Matrix Switches   • Power Dividers   • Test Accessories   • Switched/Rotary      Attenuators   • Programmable      Attenuators • RF Switches • Variable Attenuators • RF Fuse Holders • RF & DC Cable    Assemblies • Fixed Attenuators    & Terminations Get JFW's RF Conversion Tool All JFW test systems are available with GPIB, RS-232, Ethernet, or TTL interfaces. RoHS Compliant.   Innovative Power Products 631-563-0088 / Holbrook, NY Innovative Power Products has more than 30 years of experience designing and manufacturing RF Passive Components. Our couplers, combiners, baluns, resistors, and terminations incorporate the latest technology in materials available, which equates to unrivaled product performance. Products   90° Couplers    ◊ 30 MHz to 6 GHz    ◊  Power up to 1 kW CW   Directional Couplers    ◊ 20 MHz to 6 GHz    ◊ Power up to 1 kW   Combiners/Dividers    ◊ 20 MHz to 6 GHz    ◊ Power up to 2 kW   RF Resistors and Terminations    ◊ DC to 6 GHz    ◊ Power up to 800 W Services If you are looking for something that is not posted on our site, please use our Contact Us form to let us know your specific needs. A representative will contact you to discuss your requirements and help your choose the right product for your application.   American Microwave Corp Frederick, MD Tel: 301-662-4700 American Microwave Corporation (AMC) uses a state-of-the-art clean room to manufacture all of it's products, as well as a fully automated machine shop. AMC is a leader in the design and manufacturing of DC to 40 GHz solid state control components for commercial and military grades. ISO 9001:2000. PIN Diode Switches SPST through SP64T Broadband High Speed High Power Low Video Transient PIN Diode Attenuators Multi-Octave Digitally Programmable Voltage-Variable Current Controlled High Speed Detector Log Video Amps - True DC Coupled. Wide Bandwidths. Fast Rise Times. Short Recovery Times. Superior Accuracy. Extended Dynamic Range Capability. Other Capabilities Tunnel Diode Amps Wideband Detector- Amplifier-Limiter Pulse Amplitude Digitizer. Wideband Divider- Attenuator. Power Dividers/Couplers: 0.5 - 18 GHz Bias-T:  Inductive. Resistive. 15 kHz to 18 GHz   Amplical Whippany, NJ Phone: 201-919-2088 Amplical was founded by Engineers for Engineers Amplical is determined to be a leading supplier of quality RF microwave components. Utilizing the latest in RF Microwave technology, Amplical focuses on premium quality amplifiers and attenuators at affordable prices. Amplifiers are tuned for exceptional amplitude flatness and our attenuators are designed for precision and the utmost in accuracy. Our products are typically available from stock. It is our pleasure and honor to provide you with both an exceptional product and exceptional service. GaAs technology.        • Amplifiers - High Power, Maximally Flat         • Attenuators - Relay, Solid State         • Custom RF Microwave Assemblies       • Modulators - Rack & Connectorized      We        believe          that           you         should        not      have to: ...wait 3 months for your parts ...pay an arm and a leg for     these parts ...wait for days for a quote or an     answer to technical questions Most Items Available from Stock

MECA Electronics Denville, NJ   07834 Tel: 866-444-6322 Since 1961, MECA* has served the microwave industry specific to passive components in the DC to 20 GHz frequency range. *Microwave Electronic Components of America MECA serves all areas of the RF/Microwave industries including world class network providers, and supporting supply chain infrastructure. We have long been the "backbone" of high performance wired and air-interfaced networks such as in-building applications, satellite communications, radar, radio communications, telemetry applications, mobile radio, aviation & air traffic communications. Rugged & Reliable Components Since 1961 Made in the USA    •   Power Dividers & Combiners    • •   Directional Couplers    • • •   3 dB Hybrid Couplers    • • • •   Fixed Attenuators    • • • • •   Variable Step Attenuators    • • • • • •   Terminations & Loads  (Low PIM)    • • • • • • •   Isolators & Circulators    • • • • • • • •   DC Blocks & Bias Tees    • • • • • • • • •   Adapters & Cables  (Low PIM)   Planar Monolothics Industries Frederick, MD (301) 662-5019 PMI's organization has been setup to Design, Develop, Manufacture, Test, and Market complex state-of-the-art Hybrid RF MIC and MMIC Components, Supercomponents, and Subsystems. Unique products for applications in space, military, commercial, telecommunications, and consumer electronics systems. DC to 40 GHz. ISO 9001:2008 Select from PMI's Extensive Line • Amplifiers     LNA, VGA, Cryogenic     Waveguide, Limiting • Phase Shifters     Analog, Digital• Detectors • Switch Products • VCOs & DTOs • Multifunction Modules • Integrated Modules • Limiters • Filters     LP, HP, BP, BR,     lumped, combline,     switched • Attenuators • I/Q Modulators • Bi-phase Modulators • Power Dividers • Quad Couplers • DLVAs & SDLVAs Custom Design to Your Specifications   Skyworks Solutions Woburn, MA / Worldwide Contact Us Selection Guide Skyworks Solutions is an innovator of high performance analog semiconductors. Leveraging core technologies, Skyworks supports automotive, broadband, wireless infrastructure, energy management, GPS, industrial, medical, military, wireless networking, smartphone, and tablet applications. See the list below for our extensive line of products for the microwave and wireless industries, or click on the Selection Guide. Amplifiers  • Cellular  • WiFi Connectivity  • Wireless Infrastructure/     Femtocell Power Amplifiers  • Smart Energy-Connected     Home and Automation  • BDS/GPS/GNSS  • Broad Market LNAs and  • Low Noise Transistors  • Driver/Linear Amplifiers  • Gain Block  • Variable Gain Amplifiers Attenuators Circulators / Isolators Front-End Modules  • Cellular  • WiFi Connectivity  • Smart Energy-Connected     Home and Automation  • BDS/GPS/GNSS Mixers Modulators / Demodulators OptoCouplers OptoIsolators PLLs/Synthesizers/VCOs Power Management RF Passives Switches Diodes Filters   ISOTEC Great Neck, NY Phone: 516-780-2766 Fax: 718-321-9121 Since our inception in 1996 in Korea, ISOTEC has been a leading manufacturer of RF and Microwave Connectors such as SMA, MCX, SSMB, Low PIM, N, 7/16 type, etc., and RF Components such as Attenuators, Terminations, Power Dividers and more, for wireless service providers, and other RF systems designers. We provide recognized and trusted products and service to our customers in more than 60 countries worldwide. ISOTEC offers also an extensive product mix with RF Filters and Multiplexers and others. ISOTEC is ISO-9001 and ISO-14001 registered.  RF Connectors:        SMA, MCX, MMCX, SMB, BNC, TNC, SSMB        SSMC, QMA, SMP,LOW PIM N and 7/16  RF Components:       Attenuators, Terminations, Power Dividers,       Directional Couplers, Arrestors, LNAs, etc.  RF Cable Adaptors:       Between-series and within-series adaptors  RF Coaxial Cable Assemblies:       Semi-Rigid, Semi-Flexible, Flexible Cables  RF Filters:       Cavity, LC Filters, and Multiplexers   Kete Microwave Oakland, CA 510-635-4270 Kete Microwave Electronics Co., Ltd. specializes in designing and manufacturing state of the art RF/Microwave passive components solutions. RF/Microwave passive components solutions including isolator/circulator, RF resistors, terminations, attenuators, multilayer chip ceramic capacitors, feed-through capacitors, directional couplers, power divider/combiner,3 dB hybrid coupler, etc. Connectorized, surface mount, drop-in, and waveguide versions available. Product Lines Include • Isolators   • Circulators    • Attenuators     • RF Resistors      • Terminations       • Power Dividers        • Directional Couplers         • 3 dB Hybrid Couplers          • High Q Ceramic Caps Certified ISO9001-2000 and ISO 14000 Company   SigaTek Wayne, NJ 973-706-8475 SigaTek microwave specializes in high quality, high frequency microwave communication components up to 60 GHz. As a pioneer supplier of microwave RF components, the main products include directional couplers, bias tees networks, power dividers/combiners, 3 dB hybrids 90° and 180°, microwave mixers, frequency doublers, load terminations, and coaxial connectors and adapters.    All microwave components IN STOCK are    available for same day delivery. RF / Microwave Components       • Power Dividers           • Directional Couplers               • Hybrids 90, 180 Degree                   • Bias Tees                   • Microwave Mixers               • Frequency Doublers           • Loads Terminations       • Coaxial Adapters & Coaxial Connectors   Additional capabilities: Pin Diode Switches,    Phase Shifters (Analog & Digital), I/Q Modulators,    Attenuators (Analog & Digital) Custom and optimized designs are available upon customer request   Vector Telecom Melbourne, Australia sales@vectortele.com VECTOR TELECOM has fully instrumented microwave, millimeterwave, & antenna laboratories and production facilities. Our professional engineers have backgrounds from telecommunications, electronics, space and aviation industries. Frequencies up to 112 GHz, at globally competitive prices. Custom designs available. TQM / ISO 9001:2000 certification. Waveguide Components Sections » Straight  » Bend » Twist      » Transition » Magic Hybrid Tee » WG to Coax Adapter Attenuators » Fixed      » Variable Rotary Joints » Single, Dual-Channel Functions » Combiner/Divider » Circulator  » Isolator Directional Couplers » Crossguide » Broadwall Terminations » Low, Med, High Power » Short Circuit Coaxial Components » Termination » Fixed Attenuator Microwave & Millimeterwave Antennas » Standard Gain Horn » Wideband Horn » Omni-Directional » Helical