Metamaterial microwave holographic imaging system.
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.
John
J
Hunt
Jonah
J
Gollub
Tom
T
Driscoll
Guy
G
Lipworth
Alex
A
Mrozack
Matthew S
MS
Reynolds
David J
DJ
Brady
David R
DR
Smith
D004867:Equipment Design; D006696:Holography / Q000295:instrumentation / Q000379:methods*; D007259:Infrared Rays; D008872:Microwaves