SOME ELEMENTS OF FM RANGE MEASURING -- SPECTRAL ANALYSIS.
VIRGINIA UNIV CHARLOTTESVILLE INDUSTRIAL RESEARCH AND DEVELOPMENT CENTER
Pagination or Media Count:
Three factors, influencing the performance of FM distance measuring systems generally, were considered with respect to their specific effects on the spectrum of the post mixer signal 1 Two forms of the modulating signal were studied a A periodic, triangular sweep frequency modulating signal, and b A random period triangular sweep frequency modulating signal 2 Nonlinearity in the frequency-to-modulating voltage characteristic was investigated for three different nonlinear characteristics, 3 Target characteristics were studied with an area target model, two different beam patterns and various surface conditions. Each study in general consisted of appropriate mathematical development of a computational model and then presentation and discussion of calculated spectral data, comprising a parametric study of the effect involved. In the random period study two independent approaches were pursued and results were found to be in essential agreement. Author
- Active and Passive Radar Detection and Equipment