Is Orbital Angular Momentum (OAM) Based Radio Communication an Unexploited Area?

Edfors, Ove; Johansson, Anders

doi:10.1109/tap.2011.2173142

Cited by 468 publications

(311 citation statements)

References 13 publications

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“…This solution is clearly cheaper, lighter and more compact compared to the ones already proposed [5][6][7][8][9]. Moreover, although OAM cannot be used to improve the performances of a communication system except in very particular cases [12], the proposed solution can be useful to experimentally investigate the properties of the OAM or to extend to microwave frequencies imaging and identification techniques based on OAM and developed in the optical regime [13].…”

Section: Introductionmentioning

confidence: 95%

Circular Polarized Patch Antenna Generating Orbital Angular Momentum

Barbuto¹,

Trotta²,

Bilotti³

et al. 2014

PIER

157

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Abstract-The recent extension of the orbital angular momentum (OAM) concept from optical to microwave frequencies has led some researchers to explore how well established antenna techniques can be used to radiate a non-zero OAM electromagnetic field. In this frame, the aim of the present paper is to propose a new approach to generate a non-zero OAM field through a single patch antenna. Using the cavity model, we first analyze the radiated field by a standard circular patch and show that a circular polarized (CP) TM nm mode excited by using two coaxial cables generates an electromagnetic field with an OAM of order ±(n − 1). Then, in order to obtain a simpler structure with a single feed, we design an elliptical patch antenna working on the right-handed (RH) CP TM 21 mode. Using full-wave simulations and experiments on a fabricated prototype, we show that the proposed antenna effectively radiates an electromagnetic field with a first order OAM. Such results prove that properly designed patch antennas can be used as compact and low-cost generators of electromagnetic fields carrying OAM.

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Section: Introductionmentioning

confidence: 95%

Circular Polarized Patch Antenna Generating Orbital Angular Momentum

Barbuto¹,

Trotta²,

Bilotti³

et al. 2014

PIER

157

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“…After interesting and fruitful debates whether OAM multiplexing was a purely new technology or not [31]- [33], it has come to be regarded as a subset of MIMO technology by the majority of researchers in the wireless communication field as long as the OAM beams are generated by the array antennas. However, OAM multiplexing is attractive as a way to provide higher-rate transmission in an LOS channel environment without the need for complex signal processing such as channel diagonalization.…”

Section: Related Work In Oam Multiplexingmentioning

confidence: 99%

Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications

Lee

Sasaki

Fukumoto

et al. 2017

IEICE Trans. Commun.

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SUMMARY This paper explores the potential of orbital angular momentum (OAM) multiplexing as a means to enable high-speed wireless transmission. OAM is a physical property of electro-magnetic waves that are characterized by a helical phase front in the propagation direction. Since the characteristic can be used to create multiple orthogonal channels, wireless transmission using OAM can enhance the wireless transmission rate. Comparisons with other wireless transmission technologies clarify that OAM multiplexing is particularly promising for point-to-point wireless transmission. We also clarify three major issues in OAM multiplexing: beam divergence, mode-dependent performance degradation, and reception (Rx) signal-to-noise-ratio (SNR) reduction. To mitigate mode-dependent performance degradation we first present a simple but practical Rx antenna design method. Exploiting the fact that there are specific location sets with phase differences of 90 or 180 degrees, the method allows each OAM mode to be received at its high SNR region. We also introduce two methods to address the Rx SNR reduction issue by exploiting the property of a Gaussian beam generated by multiple uniform circular arrays and by using a dielectric lens antenna. We confirm the feasibility of OAM multiplexing in a proof of concept experiment at 5.2 GHz. The effectiveness of the proposed Rx antenna design method is validated by computer simulations that use experimentally measured values. The two new Rx SNR enhancement methods are validated by computer simulations using wireless transmission at 60 GHz.

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“…In fact, the vortex wave can be regarded as a special method of the signal processing as indicated in [13]. The values of δ 1 and δ 2 are needed for the solution of Eqs.…”

Section: Ucaamentioning

confidence: 99%

“…In [13], it was demonstrated that OAM radio transmission and MIMO wireless system have the equal available channel capacity for certain array configurations in free space. Besides the application in the wireless communication, OAM radio wave can also be used in the radar research field.…”

mentioning

confidence: 99%

Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

Tang¹,

Bai²,

Guo³

2017

PIER C

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Abstract-This paper studies the application of vortex wave with orbital angular momentum (OAM) in the radar. The vortex waves can have eigenstates or modes with different integer topological charges, which are orthogonal to each other. The eigenstates with topological charges of 0, −1 and 1 were utilized in this paper. The radar transmitted the pulse with topological charge of 0 and received echoes with topological charges of 0, −1 and 1. The receiver can process the signals received by these orthogonal modes to obtain the azimuth and elevation angles of the two targets in a same range gate. Compared with the traditional mono-pulse radar only with sum beam and difference beam, this vortex-wave-based radar can track two targets in principle. This is meaningful for the application of the vortex wave.

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Is Orbital Angular Momentum (OAM) Based Radio Communication an Unexploited Area?

Cited by 468 publications

References 13 publications

Circular Polarized Patch Antenna Generating Orbital Angular Momentum

Circular Polarized Patch Antenna Generating Orbital Angular Momentum

Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications

Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

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