The Department of Defense, specifically the Department of the Air Force, is planning to procure Up and Down Converters through a sole-source contract with Virginia Diodes, Inc. The requirement includes a Mixer/Amplifier/Multiplier Chain for both up-conversion and down-conversion processes, along with a horn antenna and reflector assemblies, all operating in the 330-500 GHz range, which are critical for the Terahertz Communications Team's operations. This procurement is essential as Virginia Diodes, Inc. is the only known vendor that commercially offers these frequency converters, which are not available from other sources. Interested parties may submit capability statements or proposals for consideration, with responses due by the specified deadline, and the anticipated award date is on or before April 15, 2025. For inquiries, contact Cody Owens at cody.owens.4@us.af.mil.