Post Mixer Spectra of Periodic FM Altimeters with Area Target Returns
- 1 September 1971
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. AES-7 (5) , 932-941
- https://doi.org/10.1109/TAES.1971.310334
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 samples of the calculated post mixer spectrum presented, illustrating the effects of antenna beam geometry, target surface properties, and modulation parameters.Keywords
This publication has 4 references indexed in Scilit:
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- Theoretical scattering coefficient for near vertical incidence from contour mapsJournal of Research of the National Bureau of Standards, Section D: Radio Propagation, 1961
- Radar terrain return measured at near-vertical incidenceIEEE Transactions on Antennas and Propagation, 1960
- Radar Terrain Return at Near-Vertical IncidenceProceedings of the IRE, 1957