Wideband radar imaging and signal processing array

Wideband coherent radar is capable of high-resolution target imaging. Similar to synthetic aperture radars used in terrain mapping, the analytical formulation of space-object scattering and imaging are developed. Three targets are selected to obtain their backscattering fields in computer simulation. Complex signal and spectral densities are then used to perform the image-synthesis procedure based on the Woodward method. Numerical examples are given to demonstrate resolution capability and image enhancement. The dispersive radiation field of LP (Log-Periodic) antennas are also described, and the LP signal processing models based on the fractional bandwidth of radiating elements are examined. Elemental transfer functions of narrow-band signals are developed to synthesize the overall broadband-filter function for performing pulse compression. Compression gains for signal energy density are derived using the LP-phase model. Potential performance of combining the image synthesis and LP-signal processing are briefly discussed in terms of signal resolutions, frequency agility, and waveform diversity.