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.
Metamaterial microwave holographic imaging system.
Abstract
DOI
10.1364/josaa.31.002109
Year
Chicago Citation
Hunt, John, Jonah Gollub, Tom Driscoll, Guy Lipworth, Alex Mrozack, Matthew S. Reynolds, David J. Brady, and David R. Smith. “Metamaterial microwave holographic imaging system.” Journal of the Optical Society of America. A, Optics, Image Science, and Vision 31, no. 10 (October 2014): 2109–19. https://doi.org/10.1364/josaa.31.002109.