Metamaterial microwave holographic imaging system

TitleMetamaterial microwave holographic imaging system
Publication TypeJournal Article
Year of Publication2014
AuthorsJ. Hunt, J. Gollub, T. Driscoll, G. Lipworth, A. Mrozack, M.S. Reynolds, D. J.Brady, D.R. Smith
JournalJournal of the Optical Society of America A
Date PublishedJan-01-2014

We demonstrate a microwave imaging system that combines advances in metamaterial aperture design with emerging computational imaging techniques. The flexibility inherent to guided-wave, complementary metamaterials enables the design of a planar antenna that illuminates a scene with dramatically varying radiation patterns as a function of frequency. As frequency is swept over the K-band (17.5–26.5 GHz), a sequence of pseudorandom radiation patterns interrogates a scene. Measurements of the return signal versus frequency are then acquired and the scene is reconstructed using computational imaging methods. The low-cost, frequency-diverse static aperture allows three-dimensional images to be formed without mechanical scanning or dynamic beam-forming elements. The metamaterial aperture is complementary to a variety of computational imaging schemes, and can be used in conjunction with other sensors to form a multifunctional imaging platform. We illustrate the potential of multisensor fusion by integrating an infrared structured-light and optical image sensor to accelerate the microwave scene reconstruction and to provide a simultaneous visualization of the scene.

Short TitleJ. Opt. Soc. Am. A