- Channel Microwave Corporation
 - Waveguides, high power products and application notes. - Codan
- Specialises in High Frequency Single Sideband (HF-SSB) and satellite communications equipment.
- Datron Systems
- Designer of tracking antenna products that provide television, Internet, and other broadband communication connections to the land, sea, and air mobile markets.
- dB Control
- A leader in the design, manufacture, and repair of TWT amplifiers, microwave transmitters, high/low voltage power supplies, and microwave systems for commercial and military use.
- Doppler Systems Inc.
- Radio direction finding equipment for amateur, commercial and government users.
 E2V Technologies
- Design and manufacture microwave/rf power and imaging components for communications, medical, science, space, radar, dental, and automotive industries.- Elcom Technologies
- Designs, develops, and manufactures signaling devices for segments of the optical and wireless communication markets.
- Keam Holdem Associates Ltd
- Manufacturers of radio-frequency and microwave heat and sensing equipment, as well as consultants in the electromagnetic and RF industry.
- Kevlin Corporation
- Specialising in engineering, development, and manufacturing of rotary joint design and technology.
- Linx Technologies Inc.
- Makers of RF transmitter and receiver modules, ICs, OEM products, antennas, and connectors.
- LPKF Laser & Electronics
- Manufacturer of Rapid PCB Prototyping equipment, SMT stencil lasers and AOI systems, Microvia laser drilling and structuring machines.
- MEGA Industries
- Manufacturer of microwave transmission equipment.
- Micro Metalsmiths
- Standard and custom microwave components and devices.
- Microsignals, Inc.
- Designs, manufactures, and supplies RF signal precessing components.
- Microwave Instrumentation Technologies, LLC
- Develops, markets, and supports automated microwave test and measurement systems for the satellite communications, wireless communications, transportation, aerospace, and defence industries.
- Millitech
- Designs and manufactures satcom and millimeter wave components, systems, antennas, and pedestals for commercial, space or military applications.
- Northwest Microwave
- Microwave communications and services.
- PacComm Packet Radio Systems
- Commercial and amateur radio packet equipment manufacturer.
- Partron
- Makers of dielectric filters, duplexers, isolators, chip antennas, feed through capacitors, and more.
- Radio Design Group
- Full product development or assistance for transmitters and receivers.
- Radio Frequency Services, Inc.
- Plywood presses, continuous gluers, and radio frequency generators.
- RF Solutions Ltd
- Manufactures radio modules, transmitters, receivers, transceivers, remote controls, antenna, and PIC development tools.
- RNB Technology
- Specialising in RF-microwave links, radio and transmitter networks, broadcasting technology consulting, management, installation, and sales.
- Sage Laboratories, Inc.
- Commercial telecommunications, satellite communications and defence electronics.
- Semiconductor Equipment Technologies Ltd
- Manufactures RF power supplies, automatic or manual impedance matching networks, and customised RF equipment for plasma systems.
- Sierra Microwvave Technology
- Producing parts for the military and space industries.
- Sonoma Scientific Inc.
- Production design and manufacturing of high performance, low cost isolators and circulators for the Microwave and RF industry.
- Southwest Microwave, Inc.
- Broad based technology company involved in microwave security and communications systems.
- Spinnaker Microwave
- Frequency synthesizer manufacturer Spinnaker Microwave, provides a wide variety of high performance microwave sources, including phase-locked microwave sources, voltage-controlled oscillators (VCOs), and custom microwave assemblies.
- Sunair Electronics, Inc.
- Manufacturer of both strategic high frequency (HF) communication equipment and systems; selling self-developed, customised products designed for government and military applications.
- Survey Technologies Incorporated
- Provides a laptop based system that tracks and graphically analyzes RF signal coverage over a geographic area.
- Thermex-Thermatron
- Makers of industrial radio-frequency and microwave power sources, ovens, dryers, heaters, and welders.
- Thorn Microwave Devices Limited (TMD)
- Tubes, amplifiers, power supplies, and receivers for radar, electronic warfare, EMC/RF testing, communications, laboratory and medical applications.
- Universal Microwave Corporation
- Designer and manufacturer of low phase noise voltage controlled oscillators (VCOs) and microwave frequency synthesizer modules.
- Werlatone, Inc.
- Supplies broadband, high power RF devices.
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