Virginia Diodes Inc. designs, manufactures and sells millimeter wave and terahertz devices, components, and systems. VDI's primary products are detectors, mixers, frequency multipliers, and integrated systems for reliable operation at frequencies between 18 GHz and 2 THz. All VDI components include in-house fabricated GaAs Schottky diodes and microelectronic filter structures. Other products include mesh filters, comb generators, and radiometers for applications above 100 GHz.