NDLI: A radar cross-section model for power lines at millimeter-wave frequencies (2003).

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A radar cross-section model for power lines at millimeter-wave frequencies (2003).

Content Provider	CiteSeerX
Author	Sarabandi, Kamal
Abstract	The knowledge of radar backscatter characteristics of high-voltage power lines is of great importance in the development of a millimeter-wave wire detection system. In this paper, a very high-frequency technique based on an iterative physical optics approach is developed for predicting polarimetric radar backscattering behavior of power lines of arbitrary strand arrangement. In the proposed scattering model the induced surface current is obtained using the tangent plane approximation in an iterative manner where the first-order current, obtained from the incident wave, is used as the source for the second-order current and so on. The approximation is valid for frequencies where the cable strand diameter is on the order of or larger than the wavelength. It is shown that the copolarized backscatter is dominated by the contribution from the first-order PO currents, whereas the cross-polarized backscatter is generated by the second- and higher order PO currents. Using this model, the effects of radar antenna footprint, surface irregularities, and cable sag (when suspended between towers) on radar backscatter are studied. To verify the validity of the proposed model, theoretical results are compared at 94 GHz with experimental results and are found to be in good agreement.
File Format	PDF
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Tangent Plane Approximation Radar Backscatter Characteristic First-order Po Current Cable Strand Diameter Radar Antenna Footprint Great Importance Iterative Manner Induced Surface Copolarized Backscatter Surface Irregularity Millimeter-wave Frequency Scattering Model Radar Backscatter Good Agreement Order Po Current Arbitrary Strand Arrangement High-frequency Technique Incident Wave Theoretical Result Iterative Physical Optic Approach Radar Cross-section Model Millimeter-wave Wire Detection System Cross-polarized Backscatter Experimental Result Polarimetric Radar Cable Sag High-voltage Power Line Power Line
Content Type	Text

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