چكيده به لاتين
Abstract:
In this thesis, a SBR code in MATLAB for computing the radar cross section of
complex target coated with dielectric is implemented. This method is based on
ray tracing and combining the PO and GO methods to calculate the RCS of
scatterer. The thesis consists of three parts:
In the first part, the conventional SBR algorithm is introduced to compute the
RCS of objects and the formulation and the exit aperture is described too. In this
phase, the surface of scatterer is used for aperture to gather all rays scattered
form the object. Multiple scattering is added to the code in this part, though in
the next sections some editions are done.
In the second part, according to the time of simulation for complex targets, two
algorithms are introduced to reduce the time of simulation and Increase the
accuracy of the results. The 1st algorithm is known as multiresolution that is
used for determining the incident plane with high accuracy according to the
geometry of object. The 2nd algorithm is KD tree algorithm that is used to
decrease the time of simulation.
In the third part, RCS of different objects are computed and compared with
fullwave MOM and MLFMM methods. At first the code is examined for simple
objects like a plant, cube and cylinder in monostatic and bistatic cases.
Numerical results are compared with results taken from FEKO.
Keywords: SBR method, ray tracing, geometrical optic theory, physical optic theory,
multiresolution algorithm, kd tree algorithm
