On Laser Radar Cross Section of Targets With Large Sizes for E-Polarization

Abstract

Abstract-In this paper a study is presented to handle the behavior of radar cross section (RCS) of partially convex targets of large sizes up to five wavelengths in free space. The nature of incident wave is an important factor in the remote sensing and radar detection applications. To investigate the effects of incident wave nature on the RCS, scattering problems of plane and beam wave incidences are considered. Targets are taking large sizes to be bigger enough than the beam width with putting into consideration a horizontal incident wave polarization (E-wave incidence). The effects of the target configuration together with the beam width on the laser RCS compared to the case with the plane wave incidence are numerically analyzed. Therefore, we will be able to have some sort of control on radar detection using beam wave incidence.

CA-CFAR DETECTION PERFORMANCE OF RADAR TARGETS EMBEDDED IN €œNON CENTERED CHI-2 GAMMA” CLUTTER

“…Many other models have been considered such Lognormal law, Weibull model and the K-distribution [7,8]. K-distribution is the most suitable model to fit sea clutter in high resolution radars and quantity of work [9][10][11][12][13][14] has been related to this area. However, a main drawback is related to this clutter model; it is not possible, with K-distribution clutter, to achieve a closed form expression when calculating the probability of detection of the CA-CFAR radar (Cell-Averaging Constant False Alarm Radar) [15].…”

Ultra Wide Band RCS Optimization of Multilayerd Cylindrical Structures for Arbitrarily Polarized Incident Plane Waves

“…The frequency spectrum for RCS is divided into three regions [1,2]: (1) Low frequency or Rayleigh region, where the object dimensions are much smaller than the wavelengths, which is attributed by its own approximation leading to the RCS being proportional to the fourth power of frequency; (2) High frequency region (or visible light), where the object dimensions are much larger than the wavelengths and high frequency techniques are successfully used for the computation of RCS, such as geometric optics (GO), physical optics (PO), geometrical theory of diffraction (GTD), uniform theory of diffraction (UTD), etc; (3) The middle frequency region or resonance region, where the object dimensions are comparable with the wavelengths and the common low frequency and high frequency approximations are not applicable. Several methods are developed for the computation of reflection coefficient and RCS of various structures [3][4][5][6]. Computation of radar cross-section in the middle frequency range requires the application of full-wave numerical techniques, such as MoM, FDTD, TLM, FEM, etc.…”

Backscattering From Partially Convex Targets in Free Space With H-Beam Wave Incidence

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Abstract-In [9], scattering problems of plane and beam wave incidences were presented. In that study, it was found that the target configuration together with beam width have a major effect on the laser RCS (LRCS).

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