Title :
Range profiles and images of a loaded straight wire
Author :
Li, Hsueh-Jyh ; Farhat, Nabil H. ; Shen, Yuhsyen
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
1/1/1989 12:00:00 AM
Abstract :
The range profiles and images of a straight wire without and with lumped impedance loading are discussed and demonstrated. The scattering mechanisms of a straight wire are qualitatively analyzed using the method of moments. Plots of range profiles at different aspect angles show that surface traveling waves are important scattering mechanisms of a straight wire. The presence of traveling wave makes ringlike artifacts appear in the reconstructed images. It was found that lumped impedance loading can effectively distort the range profiles and microwave images of a wire scatterer. In addition, randomly varied reactive loading can generate random peaks in the range profiles
Keywords :
electric impedance measurement; electromagnetic wave scattering; load (electric); aspect angles; loaded straight wire; lumped impedance loading; microwave images; moments method; randomly varied reactive loading; scattering mechanisms; surface traveling waves; wire scatterer; Doppler shift; Frequency; Helium; Image reconstruction; Microwave imaging; Radar scattering; Surface impedance; Surface reconstruction; Surface waves; Wire;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
