I have some misunderstandings about radar backscatter from rough dielectric surfaces and was hoping somebody could enlighten me.
I have one specific question first concerning a thought experiment. A radar wave is incident (far field, monostatic) on a surface with a twin-delta height distribution. A 'base' surface, and a 'raised' surface, with the two heights differing by half the wavelength of the radar (I appreciate the radar in fact has a bandwidth, but let's just say the central wavelength). Can the radar 'see' this surface? It seems like half the radar energy would come back from the lower surface in anti-phase with the other half, the amplitude would cancel out at the sensor and the surface would be missed? If this is the case, is the effect of the radar bandwidth enough to cancel it out?
I ask this question because it seems like many rough surfaces that are more complex could be broken down into many pairs of surface segments that differ in range by $\lambda$/2? Would all these paired surfaces be invisible?