An OAM Patch Antenna Design and Its Array for Higher Order OAM Mode Generation

Guo, Chong; Zhao, Xunwang; Zhu, Cheng; Xu, Ping; Zhang, Yu

doi:10.1109/lawp.2019.2900265

Cited by 66 publications

(28 citation statements)

References 27 publications

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“…We now have a combination of amplitude and phase modulation. Time varying phase shift at the excitation side is responsible for the phase modulation and the spatial variation of the fields introduce the amplitude dependence, and this impact is multiplicative as in (7). General forms of the modulation vectors of this case are stated at the end of the page.…”

Section: Oam Transmitter Realizationmentioning

confidence: 99%

See 1 more Smart Citation

Physical Layer Secure Communication Using Orbital Angular Momentum Transmitter and a Single-Antenna Receiver

Abbasi

Fusco

Naeem

et al. 2020

IEEE Trans. Antennas Propagat.

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Orbital Angular Momentum (OAM) for radio communications has the potential of simultaneously transmitting multiple signals at the same frequency and time resources. This multiplies the achievable channel capacity at a given bandwidth by increasing the available number of simultaneous data streams. One downside of OAM radio communication is the requirement of multi-mode radio frequency (RF) hardware at both ends of a link i.e. transmitter as well as the receiver. This is not always practically viable, especially as we move towards low profile receivers in future communication devices. In this work, we present a novel method of OAM-based radio communication with enhanced physical layer security that requires only a single antenna receiver. We first present the system architecture, then we design and realize a Rotman lens-based circular antenna array transmitter operating at 5.8 GHz. We then experimentally verify the capability of the hardware to create multiple modes. As a proof-of-concept, we propose a communication system that simultaneously uses mode 0 and +1 of the OAM beamformer and in doing so show how a single receive antenna can be used for data recovery. We first identify a general analogue modulation expression and use the proposed system to transmit digitally modulated data stream to a single antenna equipped receiver. A pre-communication training sequence is required to realize the proposed approach. Experimental results verify the simulated predictions.

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Section: Oam Transmitter Realizationmentioning

confidence: 99%

“…Several studies have highlighted novel approaches to achieve OAM wave-fronts. These include, but are not limited to, metasurface based [2]- [4], reflector-array based [5], ceramic antenna array [6], patch antenna array [4], [7] and helical antenna based [8] OAM transmitters.…”

Section: Introductionmentioning

confidence: 99%

Physical Layer Secure Communication Using Orbital Angular Momentum Transmitter and a Single-Antenna Receiver

Abbasi

Fusco

Naeem

et al. 2020

IEEE Trans. Antennas Propagat.

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“…This proportion can be characterized using the mode weight coefficient | α n |, which consists of two parts, the modal significance MS and the modal excitation coefficient

V_{n}^{i}

. Since two modes with similar eigenvalues are selected for OAM synthesis, the specific excitation level of the two modes can be further determined only by the modal excitation coefficient …”

Section: Using Tm11 Modesmentioning

confidence: 99%

“…Since two modes with similar eigenvalues are selected for OAM synthesis, the specific excitation level of the two modes can be further determined only by the modal excitation coefficient. 24 Considering the computing cost of the electromagnetic field, the infinite ground plane and the coaxial feed point is applied when the modal excitation coefficient of the patch antenna is analyzed. The variation of the excitation coefficient with frequency for the first six characteristic modes of the proposed rectangular patch antenna is shown in Figure 8.…”

Section: Effect Of Feed Structurementioning

confidence: 99%

Implementing orbital angular momentum modes using single‐fed rectangular patch antenna

Zhu

et al. 2020

Int J RF Microw Comput Aided Eng

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Wireless transmission based on orbital angular momentum (OAM) can improve spectrum utilization, but it requires effective OAM mode generation. Using the characteristic mode analysis, it is easy to obtain degenerate mode distributions of the symmetric rectangular patch. The coupling phase difference of 90° between two degenerate modes can be implemented by disrupting the symmetry. In that case, a single feed structure located at the common position of equal mode current amplitudes can excite two degenerate modes to synthesize OAM modes. When the fundamental degenerate modes of the rectangular patch antenna are used, only the field component along the beam direction has the characteristics of the first order OAM. To achieve higher order OAM modes, the patch structure should be further adjusted. By introducing slots in the patch edges and grounding the patch at its center, the single‐fed rectangular patch antenna can radiate the vortex wave carrying the second order OAM. Furthermore, the OAM mode performance such as mode purity can be analyzed by the modal excitation coefficients.

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“…Large number of researches have been carried out on UCA based OAM communication. For UCA structure, Guo Chong et al proposed a UCA strcture consisting of patch antenna element [7]. Authors of [8] compared the performance of tangential array, radial array and UCA.…”

Section: Figure 1: Oam Transmission Diagrammentioning

confidence: 99%

Analyze UCA Based OAM Communication From Spatial Correlation

Zhou

et al. 2020

IEEE Access

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Orbital Angular Momentum(OAM) of Electromagnetic(EM) wave can be seen as a new degree of freedom(DoF) for wireless communication besides time and frequency. Uniform Circular Antenna Array(UCA) fed with signal of equal amplitude and equal phase difference on each antenna element is a good OAM generation method on radio frequency(RF) band. Previous researches have shown that UCA based OAM communication system is essentially a special case of Multiple-input Multiple-output(MIMO) system and elaborated the viewpoint from different perspectives. In this paper, we demonstrate the above viewpoint from a new perspective. Specifically, for UCA based OAM communication in ideal(line of sight(Los) and coaxial) channel, we systematically analyze the variations of radiation pattern and spatial correlation of UCA under different radius and distance settings. To extend our demonstration, we first simulate the channel capacity variation with the adjustment of UCA radius and distance, and then simulate the channel capacity of both UCA and uniform linear antenna array(ULA) based communication systems, and find that ULA can also achieve similar capacity performance as UCA when spatial distance scale is similar. As is known that MIMO communication system provides spatial DoF besides time and frequency, we can conclude that mode DoF of UCA based OAM essentially originates spatial DoF of UCA based on the analysis in the paper.

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An OAM Patch Antenna Design and Its Array for Higher Order OAM Mode Generation

Cited by 66 publications

References 27 publications

Physical Layer Secure Communication Using Orbital Angular Momentum Transmitter and a Single-Antenna Receiver

Physical Layer Secure Communication Using Orbital Angular Momentum Transmitter and a Single-Antenna Receiver

Implementing orbital angular momentum modes using single‐fed rectangular patch antenna

Analyze UCA Based OAM Communication From Spatial Correlation

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