Accession Number : AD0722823

Title :   Post Mixer Spectra of Periodic FM Altimeters with Area Target Returns.

Descriptive Note : Supplement 1 to final rept.,

Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE INDUSTRIAL RESEARCH AND DEVELOPMENT CENTER

Personal Author(s) : McAlpine,G. A. ; Dammann,J. F. ; Highfill,J. H. ; Isaacs,J. C.

Report Date : APR 1971

Pagination or Media Count : 36

Abstract : 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)

Descriptors :   (*RADAR, FREQUENCY MODULATION), (*RANGE FINDING, FREQUENCY MODULATION), (*RADIO ALTIMETERS, FREQUENCY MODULATION), RADAR CROSS SECTIONS, NUMERICAL ANALYSIS, POWER SPECTRA, STOCHASTIC PROCESSES, INTEGRAL TRANSFORMS, MATHEMATICAL MODELS

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE