Ultra-wideband ground penetrating radar with orbital angular momentum control

Daniel Orfeo; Yan Zhang; Dylan Burns; Tian Xia; Dryver Huston

doi:10.1117/12.2588458

12 April 2021 Ultra-wideband ground penetrating radar with orbital angular momentum control

Daniel Orfeo, Yan Zhang, Dylan Burns, Tian Xia, Dryver Huston

Proceedings Volume 11750, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXVI; 1175007 (2021) https://doi.org/10.1117/12.2588458
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

Ultra-wideband (UWB) ground penetrating radar (GPR) is an effective, widely used tool for detection and mapping of buried targets. However, traditional ground penetrating radar systems struggle to resolve and identify congested target configurations and irregularly shaped targets. This is a significant limitation for many municipalities who seek to use GPR to locate and image underground utility pipes. This research investigates the implementation of orbital angular momentum (OAM) control in an UWB GPR, with the goal of addressing these limitations. Control of OAM is a novel technique which leverages an additional degree of freedom offered by spatially structured helical waveforms. This paper examines several free-space and buried target configurations to determine the ability of helical OAM waveforms to improve detectability and distinguishability of buried objects including those with symmetric, asymmetric, and chiral geometries. Microwave OAM can be generated using a uniform circular array (UCA) of antennas with phase delays applied according to azimuth angle. Here, a four-channel network analyzer transceiver is connected to a UCA to enable UWB capability. The characteristic phase delays of OAM waveforms are implemented synthetically via signal processing. The viability demonstrated with the method opens design and analysis degrees of freedom for penetrating radar that may help with discerning challenging targets, such as buried landmines and wires.

Conference Presentation

Citation Download Citation

Daniel Orfeo, Yan Zhang, Dylan Burns, Tian Xia, and Dryver Huston "Ultra-wideband ground penetrating radar with orbital angular momentum control", Proc. SPIE 11750, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXVI, 1175007 (12 April 2021); https://doi.org/10.1117/12.2588458

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