Water Spiral Dielectric Resonator Antenna for Generating Multimode OAM

Yu, Zhong; Guo, Nan; Fan, Jiulun

doi:10.1109/lawp.2020.2972969

Cited by 25 publications

(14 citation statements)

References 9 publications

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“…However, its size is relatively large, and the mode purity needs to be improved. Whispering gallery modes (WGM) excited by dielectric resonators can also achieve helical phase wavefronts of OAM waves, but this radiator is three‐dimensional and the feed structure is complicated [ 10–13 ] .…”

Section: Introductionmentioning

confidence: 99%

Mode Purity Improvement of High‐Order Vortex Waves

Lin

Yang

et al. 2022

Chinese J of Electronics

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Vortex electromagnetic waves can carry orbital angular momentum (OAM) modes of different order number, which are mutually orthogonal. Communication technologies multiplexing different OAM topological charges have attracted extensive attention in improving spectrum utilization. In this regard, the efficient generation of OAM modes becomes a key issue. However, it is difficult to generate high‐order OAM modes by using a microstrip antenna with a simple structure, and the mode purity is usually not high. Methodologically, the OAM wave of a microstrip antenna is mostly achieved by synthesizing degenerate eigenmodes. In this paper, combined with eigenmode analysis, the construction of high‐order and high‐purity OAM mode microstrip antennas is carried out from the perspectives of radiating element, ground plane, and structural symmetry. For a regular hexagonal patch antenna of the 4th‐order OAM mode, the mode purity is improved from about 40% to over 80% by removing the inner conductor of the patch layer, using a circular ground plane, and adding lug patches on the outside. This method of improving mode purity through the analysis of mode significance and characteristic current distribution also has guiding significance for the design of other high‐order OAM mode patch antennas.

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Section: Introductionmentioning

confidence: 99%

Mode Purity Improvement of High‐Order Vortex Waves

Lin

Yang

et al. 2022

Chinese J of Electronics

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“…In addition, the design of a Spiral shell DRA (SsDRA), resembling the shell of a sea mollusk, has been presented [ 34 ]: the numerical results showed that the optimized antenna was capable of wideband behavior (up to more than 2 GHz, between 3 GHz and 6 GHz), with satisfactory gain and efficiency. Recently, an example of a one-round spiral shell realization was proposed [ 35 ]. Due to its small size (height of 12.5 mm and thickness of 3.5 mm), the spiral shell was manufactured by means of SLA.…”

Section: Introductionmentioning

confidence: 99%

Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications

et al. 2021

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Bio-inspired Dielectric Resonator Antennas (DRAs) are engaging more and more attention from the scientific community due to their exceptional wideband characteristic, which is especially desirable for the implementation of 5G communications. Nonetheless, since these antennas exhibit peculiar geometries in their micro-features, high dimensional accuracy must be accomplished via the selection of the most suitable fabrication process. In this study, the challenges to the manufacturing process presented by the wideband Spiral shell Dielectric Resonator Antenna (SsDRA), based on the Gielis superformula, are addressed. Three prototypes, made of three different photopolymer resins, were manufactured by bottom-up micro-Stereolithography (SLA). This process allows to cope with SsDRA’s fabrication criticalities, especially concerning the wavy features characterizing the thin spiral surface and the micro-features located in close proximity to the spiral origin. The assembly of the SsDRAs with a ground plane and feed probe was also accurately managed in order to guarantee reliable and repeatable measurements. The scattering parameter S11 trends were then measured by means of a Vector Network Analyzer, while the realized gains and 3D radiation diagrams were measured in the anechoic chamber. The experimental results show that all SsDRAs display relevant wideband behavior of 2 GHz at −10 dB in the sub-6 GHz range.

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“…Water can be filled seamlessly between various complex solid structures, so it can be used in dielectric resonant antennas to fit metal structures well. Using water as a dielectric or conductor, many types of antennas can be designed, such as dielectric resonant antenna, 6,7 helical antenna, 8,9 patch antenna, 10,11 monopole antenna, 12 and so on. Literature 13 proposes a dielectric resonator antenna, which combines a U-shaped water structure with a monopole antenna to achieve a very low profile of 11.8 mm.…”

Section: Introductionmentioning

confidence: 99%

A broadband reconfigurable antenna with parasitic water radiation Array

Yang

et al. 2021

Int J RF Microw Comput Aided Eng

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Water Spiral Dielectric Resonator Antenna for Generating Multimode OAM

Cited by 25 publications

References 9 publications

Mode Purity Improvement of High‐Order Vortex Waves

Mode Purity Improvement of High‐Order Vortex Waves

Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications

A broadband reconfigurable antenna with parasitic water radiation Array

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