Scattering and Image Simulation for Recon- Struction of 3d Pec Objects Concealed in a Closed Dielectric Box
نویسنده
چکیده
A new approach of imaging reconstruction of concealed PEC targets in a dielectric closed box, using azimuth multi-angle measurements, is developed. As the broadband stepped-frequency radar transmits planar wave from different azimuth directions around the target, the backscattered electrical fields in both the amplitude and phase are obtained. The two-dimensional fast Fourier transform (2D-FFT) algorithm for spline interpolation is adopted for uniformly sampled backscattering fields. Then, 2D difference image from a dielectric box with and without the concealed targets can be numerically simulated. Multi-azimuth backscattering electrical fields of complex shaped PEC (Perfect Electric Conductor) targets and dielectric surrounding walls are calculated by the method of moments (MoM), which is based on the coupled volume-surface integral equation (VSIE). The concealed targets can be well identified from the imaging reconstruction.
منابع مشابه
Seasonal Change Investigation of Water Area in Lake Sakata Based on POLSAR Image Analysis
This paper examines seasonal change of the water area in Lake Sakata by using Polarimetric Synthetic Aperture Radar (POLSAR) image analysis. Statistical POLSAR image analysis is carried out for both Xand L-band data, based on a threecomponent scattering power decomposition method, where the decomposed components are surface scattering, doublebounce scattering and volume scattering components. F...
متن کاملFrom Image Data to Three-Dimensional Geometric Models – Case Studies on the Impact of 3D Patient Models
Image-guided diagnosis and therapy are widely used in medicine nowadays. Going one step further involves methods that allow physicians to further improve their diagnosis and to plan therapy or surgery by quantitative analysis and simulation. Fundamental requirements for this kind of quantitative medicine are methods for reliable creation of 3D patient models that faith-fully represent the indiv...
متن کاملSimulation and patient studies of scatter correction in cardiac SPECT imaging
Introduction: Myocardial perfusion imaging is a nuclear medicine imaging method that is used to detect coronary artery diseases. One of the main sources of error in this imaging method is the detection of Compton scattered photons in the photopeak energy window used for data acquisition. This results in the degradation of the image contrast, and therefore decreases the...
متن کامل3D Simulation of the Effects of the Plasma Actuator on the Unsteady, Turbulent and Developing Flow within a Circular Duct
The objective of current paper is 3D simulation of turbulent, developing flow and unsteady within a circular duct in presence of the body force vector persuaded by Dielectric barrier discharge (DBD) plasma actuator inside the surface of geometry for the first time. This article aims at investigating of applying plasma actuator to control separation with special arrangement of electrodes. For th...
متن کاملA New Theorem Concerning Scattering of Electromagnetic Waves in Multilayered Metamaterial Spherical Structures
The proposed theorem in this paper is indicative of a kind of duality in the propagation of waves in the dual media of and in the spherical structures. Independent of wave frequency, the number of layers, their thickness, and the type of polarization, this theorem holds true in case of any change in any of these conditions. Theorem: Consider a plane wave incident on a multilayered spheric...
متن کامل