Electrically controlled phased array OAM radar

Daniel J. Orfeo; Dylan Burns; Dryver R. Huston; Tian Xia

doi:10.1117/12.2559388

18 May 2020 Electrically controlled phased array OAM radar

Daniel J. Orfeo, Dylan Burns, Dryver R. Huston, Tian Xia

Proceedings Volume 11408, Radar Sensor Technology XXIV; 1140810 (2020) https://doi.org/10.1117/12.2559388
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

Control of orbital angular momentum (OAM) offers the potential for increases in control, sensitivity, and security for high-performance microwave systems. OAM is characterized by an integer OAM mode where zero represents the case of a plane wave. Microwaves with a nonzero OAM mode propagate with a helical wavefront. Orthogonal OAM modes can be used to carry distinct information at the same frequency and polarization, increasing the data rate. The OAM waveform may also increase radar detection capability for certain shaped objects. OAM can be induced by broadcasting a plane wave through a spatial phase plate (SPP) dielectric which introduces an azimuthally dependent phase delay. However, SPPs are frequency-specific, which presents an obstacle for harnessing OAM in frequency-modulated communication systems and wide-bandwidth radar. In this study, we develop a circular phased array to synthesize the desired vortex-shaped wavefront. This approach offers a critical advantage: the phases of all antenna elements are easily programmable under different frequencies. As a result, transmission and reception of the OAM beam can be controlled with great flexibility, making it operable over a wide frequency spectrum, which leverages OAM radar functionality and performance. In this paper, we will investigate a wide-bandwidth radar with OAM mode-control and signal processing.

Conference Presentation

Citation Download Citation

Daniel J. Orfeo, Dylan Burns, Dryver R. Huston, and Tian Xia "Electrically controlled phased array OAM radar", Proc. SPIE 11408, Radar Sensor Technology XXIV, 1140810 (18 May 2020); https://doi.org/10.1117/12.2559388

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