Polarimetric decomposition is an effective way to analyze the scattering mechanism of targets in polarimetric synthetic aperture radar (PolSAR) images. However, analysis urban areas frequently a challenge. Most methods use rotated dihedral derived via rotation matrix model double-bounce buildings. according electromagnetic theory, existing not accurate, especially when orientation angle large. ...

A fundamental way of describing a photon-limited imaging system is in terms of a Poisson random process in spatial, angular and wavelength variables. The mean of this random process is the spectral radiance. The principle of conservation of radiance then allows a full characterization of the noise in the image (conditional on viewing a specified object). To elucidate these connections, we first...

F. Beiuşeanu,1 C. Horea,1 E.-V. Macocian,1 T. Jurcuţ,1 L. Vitos,2,3,4 and L. Chioncel5,6 1Department of Physics, University of Oradea, RO-410087 Oradea, Romania 2Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm SE-100 44, Sweden 3Department of Physics and Materials Science, Uppsala University, PO Box 516, SE-75120 Uppsala, Swed...

Traditionally, fully polarimetric calibration of a nonreciprocal radar system requires measurements at least two passive calibrators, such as dihedral corner reflector plus metal plate or sphere. Interchanging multiple calibrators results in not only higher complexity but also degraded uncertainty. In this work, new calibrator is proposed, which designed quarter concave cylinder linked (QCCLD)....

Canonical objects with known radar cross section (RCS), for example, the trihedral corner reflector (TCR), play a crucial role in calibration of automotive sensors. Moreover, these canonical are also used validation simulated RCS obtained using asymptotic methods, such as hybrid geometric optics (GO) and physical (PO) based methods. However, accurate prediction methods is highly dependent on in...

We propose an advanced physical optics formulation for the accurate modeling of dielectric lenses used in quasi-optical systems of millimeter, submillimeter, and infrared wave applications. For comparison, we obtain an exact full-wave solution of a two-dimensional lens problem and use it as a benchmark for testing and validation of asymptotic models being considered.

We propose and implement a geodesic half-Maxwell fish-eye (MFE)-lens antenna. The lens was optimized using an in-house physical optics (PO) code adapted for generalized lenses. final antenna design validated with commercial electromagnetic simulation software. combines modulated half-MFE transition to linear flare, which is needed preserve the polarization in aperture. prototype, designed opera...

Edge functions T1 and T2, which describe the polarization-dependent edge contribution to forward scattering by spheres, are derived from the exact Mie solution. All the relative refractive indices and the 64 < x < 2048 size parameter range are considered. The edge functions significantly improve the approximation methods that can be used to calculate forward-scattering patterns. For m close to ...