American soldiers in the Indo-Pacific region are training to be "small and undetectable" in the electromagnetic spectrum.

Terahertz (THz) technology refers to the use of electromagnetic waves in the terahertz (1 THz = 1012 Hz) region of the electromagnetic spectrum that covers the frequency range from roughly 0.1 to 50 ...

Each region of the electromagnetic spectrum has a range of wavelengths associated with it. The range of wavelengths affects the way each type of EM wave behaves and interacts with matter.

and THz regions of the electromagnetic spectrum. STL also serves as a prime contractor on a US Army radar program delivering direct government support in UHF-band thru W-band target signature ...