ABSTRACT
Perfectly Electrically Conducting Object in Free Space ...................................200 5.3.2 Verification of the Calculated Scattering Characteristics of Simple
Shape Perfectly Electrically Conducting Objects .............................................. 205 5.3.3 A Method for Calculating the Radar Scattering Characteristics of
Complex-Shaped Aerial Perfectly Electrically Conducting Objects Using an Iterative Algorithm ............................................................................... 211
5.3.4 The Magnetic Field Integral Equation for a Subsurface Perfectly Electrically Conducting Resonant Object........................................................... 214
5.4 Calculation Methods for Obtaining the Scattering Characteristics of Aerial and Subsurface Dielectric Resonant Objects Based on an Integral Equation Solution in the Frequency Domain ................................................................................. 215 5.4.1 A Method for Solving the System of Integral Equations for a
Dielectric Object in Free Space ............................................................................. 216 5.4.2 Verification of the Calculated Scattering Characteristics of Simple
Shape Dielectric Objects ...................................................................................... 218 5.4.3 System of Integral Equations for a Subsurface Dielectric Object .................... 220
5.5 Method for Computing the UWB Impulse Responses for Resonance-Sized Objects .............................................................................................................................. 221
5.6 Computed UWB High-Resolution Range Profiles of Complex-Shaped Aerial Resonant Objects ....................................................................................................223
5.7 Calculated UWB Impulse Responses of Buried Land Mines .....................................230 5.8 Conclusions ......................................................................................................................... 231 References ..................................................................................................................................... 232
This Chapter examines the use of ultrawideband (UWB) signals (signals with spectrum confined within a very high frequency [VHF] and ultra high frequency [UHF] bands) to enhance the non-cooperative radar identification of objects. Many radar books contain a classic figure showing the enhancement of the radar cross section (RCS) of a perfectly electrically conducting (PEC) sphere, when the signal frequency falls in the Mie resonance region. This condition occurs when the ratio of the circumference to the wavelength lies between 1 and 10. The experimental studies mentioned in Chapter 4 described how the use of radar resonant waveband sounding signals can stimulate secondary radiation of objects. This chapter describes how to predict those reflected fields.
