Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Wireless Communication of Radio Waves Carrying Orbital Angular Momentum (OAM) Above an Infinite Ground Plane
AU - Wang, Lei
AU - Park, Woocheon
AU - Yang, Cheng
AU - Brüns, Heinz-Dietrich
AU - Kam, Dong Gun
AU - Schuster, Christian
PY - 2020/10/5
Y1 - 2020/10/5
N2 - Radio waves carrying orbital angular momentum (OAM) have been intensively studied in recent years with respect to generation, propagation, and communication. In this article, the effect of an infinite ground on OAM wave propagation and communication is investigated numerically using the method of moments (MoM). A circular array of half-wavelength dipoles is taken as a uniform circular array, for the generation and reception of OAM waves. First, electromagnetic image theory is adopted for analysis and numerical investigation of image OAM arrays and their influence of reflections from the ground plane. Employing MoM and mixed-mode scattering parameters, the impact of the ground plane on wireless communication is further explored by varying the communication distances between the transmitting and receiving arrays, heights of OAM arrays above the ground, and array orientations. Compared to OAM-based communication in free space, the effect of the ground plane turns out to be considerable. Specifically, it was found that OAM-based communication not only suffers from destructive influence due to reflections from the ground but also from reduced mode isolation. The results obtained in this article will be fundamental for optimizing OAM-based communication in a realistic environment.
AB - Radio waves carrying orbital angular momentum (OAM) have been intensively studied in recent years with respect to generation, propagation, and communication. In this article, the effect of an infinite ground on OAM wave propagation and communication is investigated numerically using the method of moments (MoM). A circular array of half-wavelength dipoles is taken as a uniform circular array, for the generation and reception of OAM waves. First, electromagnetic image theory is adopted for analysis and numerical investigation of image OAM arrays and their influence of reflections from the ground plane. Employing MoM and mixed-mode scattering parameters, the impact of the ground plane on wireless communication is further explored by varying the communication distances between the transmitting and receiving arrays, heights of OAM arrays above the ground, and array orientations. Compared to OAM-based communication in free space, the effect of the ground plane turns out to be considerable. Specifically, it was found that OAM-based communication not only suffers from destructive influence due to reflections from the ground but also from reduced mode isolation. The results obtained in this article will be fundamental for optimizing OAM-based communication in a realistic environment.
U2 - 10.1109/TEMC.2020.2965656
DO - 10.1109/TEMC.2020.2965656
M3 - Journal article
VL - 62
SP - 2257
EP - 2264
JO - IEEE Transactions on Electromagnetic Compatibility
JF - IEEE Transactions on Electromagnetic Compatibility
IS - 5
ER -