I am trying to find the physical reasoning for a relationship between EM wavelength vs. resolution (target detection), diffraction (in aperture hole). Can anyone suggest me good material that discusses this concept (not equations). I am confused with so many scattering phenomenons (like Mie, rayleigh based on wavelength and particle size). I am currently reading about sub surface target detection using EM waves.
Hello. I am recommend you check the paper "Ground-penetrating radar an its use in sedimentology: principles, problems and progress" by Adrian Neal (ELSEVIER). See you and good luck.
There is no one place, nor simple explanation. The target contrast, thickness of the contrast transition, target shape and orientation, EM wave polarization, smoothness of the target surface and embedding material (or roughness) all come into play, not just EM wavelength versus target size and resolution....these are covered as individual papers in the literature or chapters in books, but nowhere in one place. Further, these factors interact, so the scattering from a sharp boundary such as a water table in coarse sand versus a more diffuse and rough boundary in a fine sand interacts with
the angle of the antenna if the surface of the earth is not parallel to the water table. These effects are also changed by signal processing choices (which may be built into the GPR hardware, giving the user no choice).
yes sir, But i am in a need of physical explanation (with some mathematical depth) for relation between range resolution and frequency (is it just for segregating the reflections on the different parts of the target/ avoiding the overlapping of reflection ), and how frequency affect plan resolution, since what i got from some books is, range resolution influenced by frequency and plan resolution is influenced by beam width, in source point of view).. But not able to get a clarity on the concept involved... I also try to understand effect of diffraction in soil media(texture) for difference frequency, since all are related, searching for some material to get clarity on diffraction, plan resolution, range resoultion.. etc. is it possible to do pre experiment to know Brewster angle for soil-air interface.....because i try to align my beam (with p- Polarization) my input beam as close to brewster angle...