This is a market research notice from NIST seeking a 67 GHz microwave source to characterize piezoelectric microwave acoustic resonators for advancing semiconductor and 5G technology. The required instrument must meet detailed technical specifications, including specific power outputs and phase noise levels at various frequencies. The notice seeks information from manufacturers or authorized resellers about capable products, their features, customization, origin, and support services. There is no specified budget, performance location, or submission timeline provided in the description.