Post Mixer Spectra of Periodic FM Altimeters with Area Target Returns.
Supplement 1 to final rept.,
VIRGINIA UNIV CHARLOTTESVILLE INDUSTRIAL RESEARCH AND DEVELOPMENT CENTER
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A periodic fm altimeter is postulated and its illuminated area target modeled as an array of elemental scatterers. A computational form is then developed expressing the desired post mixer spectrum as a sum of spectral components corresponding to the individual scatterer returns. Application of the model is made to the case of a triangular linear sweep fm altimeter and parametric studies of the calculated post mixer spectrum presented, illustrating the effects of antenna beam geometry, target surface properties and modulation parameters. Author
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