Improvement of resolution in aperture synthesis in near zone of radiation based on the application of the Prony’s method
Journal Title: Journal of Physics and Electronics - Year 2018, Vol 26, Issue 2
Abstract
Applicability of inverse filtering with evolution control for reconstruction of images obtained by aperture synthesis technique is considered. A horn antenna, which is moved in the transversal direction, is used in order to obtain a 2-dimensional image. Scanned structure consists of one or two similar metaplates. In the latter case the plates are coplanar and their common plane is parallel to the aperture of the antenna. Regularisation coefficients are found with the help of trial and error method. The image of a single plate was used to tune the software. The Prony’s method is tested as a separate way of estimation of the distance between the plates. Both methods are tested for a range of different distances between the plates and between the plates’ common plane and aperture of the antenna. It is shown that inverse filtration tends to provide better results if the scanned object is situated further from the antenna. Said method was proven to be precise enough to distinguish closely-spaced plates. The Prony’s method was proven to provide reliable distance measurements if it was tuned correctly.
Authors and Affiliations
О. O. Drobakhin, O. V. Olevskyi
Keywords
Related Articles
- EP ID EP631812
- DOI 10.15421/331830
- Views 125
- Downloads 0
Photoluminescence and EPR spectrum of ZnO:Mn nanocrystals
Nanocrystals of ZnO:Mn were obtained by ultrasonic spray pyrolysis and had dimensions of d ~ 36 nm. The changes of photoluminescence end EPR spectra of these nanocrystals in dependence of Mn admixture concentration ( 2–8...
The peculiarities of formation and thermodynamic functions of τ-phase
It is shown that for alloys with boron content of 0.1–6.5% (wt.) and carbon content of 0.3–4.0% (wt.) without pretreatment no formation of cubic boron carbide takes place under crystallization. The cubic boron carbide ca...
Relaxation processes in completely ionized plasma in generalized Lorentz model
On the basis of the Landau kinetic equation a generalized Lorentz model is proposed, which contrary to the standard model, considers ion system as an equilibrium one. For electron system kinetic equation of the Fokker-Pl...
Non-dissipative hydrodynamic equations based on a nonlocal collision integral
We consider a slightly non-uniform one-component gas with weak potential interaction. The basis of the investigation is the known kinetic equation in the case of small interaction which is truncated up to the second orde...
Application of “PolySwitch” fuses for the limitation of current overloads in photovoltaic systems of solar arrays
The results of experimental study of the transformation of the light current-voltage and volt-watt characteristics for the parallel connections of photovoltaic modules when using “PolySwitch” polymer resettable fuses are...