Dow-Key Microwave , is an ISO 9001 certified manufacturer of electromechanical coaxial and waveguide switches, switch matrices, integrated modular assemblies, and related passive components. Dow-Key's product line ranges from single-pole single-throw to single-pole 14-throw switches as well as transfer, in-line and waveguide switches, switch matrices, and integrated modular switch assemblies.

K&L Microwave is a world leader in the design and manufacture of RF and Microwave filters, duplexers and sub-assemblies, providing the most extensive filter-based product range in the industry, spanning from 300 kHz to 94 GHz.  K&L offers ceramic, cavity, lumped element, waveguide and tunable solutions for military, commercial and telecommunications applications.

Vectron International is a world leader in the design, manufacture and marketing of Frequency Control, Sensor, and Hybrid Product solutions using the very latest techniques in both bulk acoustic wave (BAW) and surface acoustic wave (SAW) based designs from DC to microwave frequencies. Products include crystals and crystal oscillators; frequency translators; clock and data recovery products; SAW filters and components used in telecommunications, data communications, frequency synthesizers, timing, navigation, military, aerospace and instrumentation systems.