DIELECTRIC COLUMN BACKSCATTER DUE TO MECHANICAL DEFORMATION

摘要

Low dielectric permittivity columns are often used inrnRCS measurements to support targets.rnElectromagnetic and mechanical interactions betweenrntarget and mast occur and subtraction cannot eliminate them.rnIn this paper we will study mechanical phenomenarnsuch as bending and compression (up to buckling)rnunder load and we will calculate the dielectric mastrnbackscattering level owing to these two deformations.rnIt appears that compression effects are usuallyrnnegligible compared to bending effects.rnFinally, we will propose some rules on mast design.rnMore specifically, a cubic section can perform thernsupport of the targets and so decrease the spuriousrnbackscattering.