Encoding many channels on the same frequency through radio vorticity: first experimental test

By Fabrizio Tamburini, E. Mari, A. Sponselli, B. Thid'e, A. Bianchini, F. Romanato. 2011

1,027 citations recorded by the source corpus.

We have shown experimentally, in a real-world setting, that it is possible to use two beams of incoherent radio waves, transmitted on the same frequency but encoded in two different orbital angular momentum states, to simultaneously transmit two independent radio channels. This novel radio technique allows the implementation of, in principle, an infinite number of channels in a given, fixed bandwidth, even without using polarization, multiport or dense coding techniques. This paves the way for innovative techniques in radio science and entirely new paradigms in radio communication protocols that might offer a solution to the problem of radio-band congestion.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/8b20c1b61057f4f24e91bbc2cb774f8e611b070e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Atomic and Molecular Physics, and Optics

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Circular Polarized Patch Antenna Generating Orbital Angular Momentum (2014, positive): “Starting from this ﬁrst demonstration, several systems generating EM ﬁelds with non-zero OAM have been proposed [5–9].”
Communication with spatially modulated light through turbulent air across Vienna (2014, background): “While experiments with twisted radio waves for classical data transmission have been performed over ∼450m in a free-space link in a city [25], the same has not yet been possible for optical frequencies because of the sensibility of the visible light to turbulence.”
Measurement of the spin of the M87 black hole from its observed twisted light (2019, methodology): “OAM-carrying beams permit the encoding and extraction of more information into and from the electromagnetic radiation emitted by a distant source than any existing method that is based on the intensity of the field only (Torres & Torner 2011; Tamburini et al. 2012).”
Orbital-Angular-Momentum-Based Electromagnetic Vortex Imaging (2015, methodology): “I N RECENT years, orbital angular momentum (OAM) has attracted more and more attention due to its particular physical property that it can offer new degrees of freedom in addition to traditional linear momentum and polarization degrees of freedom [1].”
Radial Uniform Circular Antenna Array for Dual-Mode OAM Communication (2017, background): “Variable spiral phase plates structures, travelingwave slot antennas, and single patch antennas are designed to generate favorable OAM beams in radio domain [5]–[9], and some twisted parabolic antennas fabricated in different approaches are proposed for high directivity [3], [10], but it may not be ”
Generation of OAM Beams Using Phased Array in the Microwave Band (2016, neutral): “Hitherto, OAM has been widely exploited in wireless communication [4], quantum state manipulation [5], and radar imaging [6].”
Photon Spin Hall Effect-Based Ultra-Thin Transmissive Metasurface for Efficient Generation of OAM Waves (2019, background): “One of the most promising applications of OAM waves is to utilize them in wireless communications for enhancing channel capacities [6]–[8].”