Investigation of Range-Correlated Features in Fourier Domain Artifacts Measured Using a Dynamic Antenna Array

We investigate range-dependent artifacts manifesting in the Fourier domain responses of conductive cylinder measured with a two-element interferometric dynamic antenna array. By illuminating the scene with two noise transmitters and capturing the scattered signals at two receiving antennas, angle-dependent spatial frequency (two-dimensional Fourier domain) responses of the scene can be obtained via rotational array dynamics. Finite bandwidth signals exhibit range correlation, which manifests in range-dependent measurements. For long conducting objects, the projected baseline changes as a function of rotation angle, causing appreciable range and thus phase variations. We explore cyclical responses manifesting as a function of angle and target range for potential use in target range estimation.