Millimeter-Wave and Submillimeter-Wave/Terahertz Passive Imaging System Requirements: A Phenomenological Perspective
Final rept. Feb-Mar 2013
ARMY RESEARCH LAB ADELPHI MD
Pagination or Media Count:
The phenomenology of imaging in the millimeter-wave MMW and submillimeter-wave SMMWterahertz THz frequency regimes is investigated and described. The primary factors related to imaging in these frequency regimes are phenomenologically driven and involve trade-offs between spatial angular resolution the impact of atmospheric and obscurant attenuations such as fog, dust, and concealing materials and system sensitivity requirements. Minimum system sensitivity requirements for adequate imaging in three important militarysecurity scenarios are identified and described in terms of minimum apparent temperature differences between targets and their backgrounds. Mathematical equations for calculating the minimum system sensitivity noise equivalent power NEP per root hertz Hz required to provide image frames with enough signal-to-noise ratio SNR to produce good imagery at video frame rates are derived.
- Radiofrequency Wave Propagation