The conventional range resolution is defined as 1/bandwidth (BW) and a functional range resolution is suggested as 2/BW for point scatterers. But, in actual radar situations, positions of peaks do not represent true locations of the scatterers. In addition, the amount of deviation between peaks and true locations is not proportionally decreased as the distance between the two increases. In this thesis, to explain and predict this situation in detail, a complex form of expression was derived in terms of the starting frequency for a linear frequency modulation (LFM) chirp pulse radar. A quantitative analysis approach to the range resolution was defined and applied to some of previous studies and the range profiles of magnitude envelope were analyzed and experimented for two point targets for cases with different starting frequencies of sweep frequencies within the same bandwidth. Finally a ‘map’ type of contour plot for the ‘quantitative’ range resolution was generated to anticipate and analyze resolution characteristics. It is analyzed that LFM continuous wave (CW) waveform show the very similar pattern as LFM pulse waveform. As a result of the new complex range resolution model, analyses were matched well with practical measurements experiments about the range resolution value for two point targets. Then, this new range resolution characteristics were applied to several two dimensional (range and azimuth) SAR images with 5-by-5 point scatterers and a few thousand point cloud scatterers beyond the two point targets. Most of the modeling of targets in image radar (SAR) was conducted by dividing them into ray tracing and statistical distribution model methods, In this thesis, a point cloud target model was created by representing artificial targets and Earth surface clusters as scattering points in a three-dimensional lattice space, as a result of creating an image radar (SAR) image and comparing it with the images of the actual vehicle-mounted SAR system, it was confirmed that it was useful. Index Terms—Chirp pulse, LFM (Linear Frequency Modulation), Radar, Range resolution, SAR (Synthetic Aperture Radar), Point Cloud model, clutter
