|Title||Metamaterial microwave holographic imaging system|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||J. Hunt, J. Gollub, T. Driscoll, G. Lipworth, A. Mrozack, M.S. Reynolds, D. J.Brady, D.R. Smith|
|Journal||Journal of the Optical Society of America A|
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 Title||J. Opt. Soc. Am. A|