Broadern
- Specializes in designing and manufacturing RF and microwave subsystems and components. [Site requires Flash plugin]
- http://www.broadern.com

Emhiser Micro-Tech
- Designs and manufactures miniature voltage controlled oscillators in a variety of packages covering the frequency range of 5 MHz to 7 GHz. Includes a specifications database.
- http://www.emhiser.com/EmhiserMT/default.asp

Credowan
- Specialises in the manufacture of waveguide assemblies and other devices and components including couplers, transitions and loads.
- http://www.credowan.co.uk/

Reactel Incorporated
- Manufactures RF and microwave filters, diplexers, sub-assemblies.
- http://www.reactel.com/

Micronetics
- Manufactures high quality coaxial, waveguide and surface mount microwave noise sources for noise figure measurement and built-in-test modules.
- http://www.micronetics.com/Noise/Source.html

Microwave Filter Company, Inc.
- Design, and manufacture passive electronic filters for radio and microwave frequencies.
- http://www.microwavefilter.com/

Kokan Densetsu Kogyo K.K.
- Licenser of a direct drive passive mixer for microwave and millimeter-wave using an electrostatically coupled circuit.
- http://www12.ocn.ne.jp/~n-ets/eng/ddm/ddm_hp.html

Trackcom Systems International Inc.
- Designs, manufactures and markets 1 to 40 GHz OEM modules for wireless transmission products.
- http://www.trackcom-sys.ca/

Lemos International
- Manufacturer and distributor of RF and microwave components.
- http://lemosint.com/

Taylor Microwave, Inc.
- Manufacturer of microwave components, power dividers, pin diode switches, and attenuators.
- http://www.taylormw.com/

International Telecommunications Components
- Manufacturer and assembly of waveguide components and adapters.
- http://www.itcincorporated.com/

Lucix Corporation
- Manufactures components and subsystems including oscillators, amplifiers, up/down converters, transceivers and subassemblies. Frequency ranges from 2 GHz to 90 GHz.
- http://www.lucix.com/

M2 Global Technology, Ltd
- Supply standard and custom configurations for coaxial, wave-guide, and drop-in circulators and isolators. Primary markets served include commercial communications, power amplifiers, and satellite communications.
- http://www.m2global.com/

Huber+Suhner
- Manufacture a range of RF components and connectors. Includes product catalogs and applications.
- http://www.hubersuhner.com/

Elitec Inc.
- Manufacturers representative for a range of components including PCB substrates and oscillators Also offer design facilities for wireless communication systems.
- http://www.elitec.com/

ARRA Inc.
- Design and manufacture microwave and rf products for commercial, military, scientific and educational use. Products include coaxial and waveguide devices and educational training kits .
- http://www.arra.com/

Amplus Communication
- RF, microwave, millimeter wave components, subsystems and systems.
- http://www.amplus.com.sg/

Elcom Technologies
- Designer and manufacturer of microwave frequency synthesizers and phase locked sources 1 - 23 GHz.
- http://www.elcom-tech.com/

Micro Lambda Wireless Inc.
- Manufacturer of low phase noise microwave yttrium iron garnet (YIG) oscillators, phase locked sources and frequency synthesizers for broadband wireless systems.
- http://www.micro-lambda.com/

Telonic Berkeley Inc.
- Manufacture a range of rotary step step attenuators, including bench mount, programmable and custom designs.
- http://www.telonicberkeley.com/Attenuators.html

DiTom Microwave
- Designer and manufacturer of microwave components including ferrite isolators and circulators for the wireless market.
- http://www.ditom.com/

Raditek
- Provides wireless and microwave products including isolators and circulators, oscillators, synthesizers, couplers, and splitters.
- http://www.raditek.com/