Three Dimensional Imaging Algorithm for Synthetic Aperture Radar with Metamaterial Apertures-Based Antenna

Artificially structured metamaterials apertures antennas (MAA) enables producing the pseudorandom and spatially variant radiation fields to encode spatial information and retrieve scene images using computational imaging (CI) algorithms. Combined with synthetic aperture radar (SAR) technologies, by moving a linear shape MAA in crosswise direction, a hybrid imaging system with the combination of MAA and SAR is demonstrated in this paper. Focusing on this peculiar imaging geometry, we propose a postprocessing algorithm which combines the classic omega-k algorithm and CI algorithms to achieve fully three dimensional scene images. Compared with traditional frequency-diverse imaging reconstruction algorithms, the postprocessing is more efficient could achieve as high efficiency as SAR algorithms do. Extensive imaging simulations are conducted to illustrate the effectiveness of the proposed algorithms.