Title :
A physical optics approximation to the range profile signature of a dihedral corner reflector
Author :
Richards, Michael A. ; Trott, Keith D.
Author_Institution :
Nichols Res. Corp., Shalimar, FL, USA
fDate :
8/1/1995 12:00:00 AM
Abstract :
The frequency-domain field scattered from a perfect electrically conducting (PEC) 90° dihedral corner reflector is summarized. The inverse Fourier transform is used in conjunction with the frequency-domain description to obtain a high-frequency analytical approximation to the impulse response of the dihedral reflector. An amplitude modulated (AM) pulse is convolved with the impulse response of the target to yield the range profile signature. The range profile provides a one-dimensional image of the scatterer. This geometry was chosen because it is the most basic canonical shape that manifests the double-bounce mechanism. Numerical results presented show the relative importance of the single-bounce and double-bounce scattering mechanisms in the time-domain. Comparisons are made with range profiles computed using spectral windows
Keywords :
Fourier transforms; amplitude modulation; approximation theory; electromagnetic wave scattering; inverse problems; physical optics; radar antennas; radar cross-sections; radar imaging; reflector antennas; synthetic aperture radar; transient response; SAR; amplitude modulated pulse; canonical shape; dihedral corner reflector; double-bounce mechanism; double-bounce scattering mechanism; frequency-domain description; frequency-domain field; geometry; high-frequency analytical approximation; impulse response; inverse Fourier transform; numerical results; one-dimensional image; perfect electrically conducting reflector; physical optics approximation; range profile signature; scattered field; single bounce scattering mechanism; spectral windows; time-domain; Electromagnetic scattering; Frequency domain analysis; Geometry; Legged locomotion; Optical scattering; Physical optics; Polarization; Pulse modulation; Radar scattering; Shape;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
