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We describe a computational imaging technique to extend the depth-of-field of a 94-GHz imaging system. The technique uses a cubic phase element in the pupil plane of the system to render system operation relatively insensitive to object distance. However, the cubic phase element also introduces aberrations but, since these are fixed and known, we remove them using post-detection signal processing...
The Micro Autonomous Systems and Technology program is conducting research to develop small air and ground robotic systems for acquisition and delivery of improved situational awareness to warfighters.
In this paper we demonstrate the miniaturization of a loop antenna through simulation and experiment using synthetic reactive elements, namely split ring resonators (SRRs), embedded in the substrate of the antenna. Two designs were considered with SRRs both in and out of the plane of the substrate. Simulation results show that antenna size can be reduced up to thirty eight percent for both designs...
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