Three‐dimensional profiling of collimated radio‐frequency orbital angular momentum beams

Hamilton, Joshua K.; Berry, Simon J.; Spencer, Joseph H.; Lawrence, Christopher R.; Smith, Francis C. and Drysdale, Timothy D. (2020). Three‐dimensional profiling of collimated radio‐frequency orbital angular momentum beams. IET Microwaves, Antennas & Propagation, 14(6) pp. 547–550.

DOI: https://doi.org/10.1049/iet-map.2019.0808

Abstract

The use of orbital angular momentum (OAM) modes in radio communication is thought to enhance capacity. This work focuses on using the l = +1 mode transmitted from a 180 mm diameter, 8‐element circular antenna array. The transmitted OAM beam was collimated by using a spherical mirror and the intensity and phase were investigated. A xyz scanning stage was used to profile the propagating OAM beam in three dimensions, resulting in a detailed investigation into the effects of collimation on the OAM beam. The proposed system was shown to reduce the beam divergence from 36.6° to 1.2°, without affecting the OAM mode purity of the beam for a frequency range of 4–6 GHz. This investigation showed a step towards realising practical control over the divergence of OAM‐carrying beams.

Viewing alternatives

Look up in Google Scholar

Download history

Metrics

Public Attention

Altmetrics from Altmetric

Number of Citations

Citations from Dimensions

Item Actions

Export

About

CORE (COnnecting REpositories)

Recommendations