Microwave Imaging Using Frequency-Diverse Scattering of a Random Rough surface
| Autor: | Ehsan Rashidi-Ranjbar, Mojtaba Dehmollaian |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Geometrical optics business.industry Aperture Scattering 020206 networking & telecommunications Reflector (antenna) 02 engineering and technology 01 natural sciences Optics Microwave imaging 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Surface roughness Antenna (radio) 010306 general physics business Image resolution |
| Zdroj: | 2019 27th Iranian Conference on Electrical Engineering (ICEE). |
| DOI: | 10.1109/iraniancee.2019.8786567 |
| Popis: | Single-shot computational microwave imaging of a target is obtained using a frequency-diverse aperture. The idea is to use random rough surfaces to generate random scatterings at various frequencies. Radiation from a conducting rough reflector, normally illuminated by an ultrawideband antenna working within 20–45 GHz frequency range provides random patterns at various frequencies. To offer as much spatially uncorrelated near-field scans as possible four conducting walls are placed around the rough surface. Scattering is calculated using geometrical optics approximation that takes into account multiple interactions. Applying the standard back-projection method and the least-squares reconstruction technique, it is shown that for a 1 square meter image size, by using 801 frequency samples a descent focused image with a pixel size of about 1/801 square meters is realizable. |
| Databáze: | OpenAIRE |
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