Fast Analysis of Parallel-Plate Cylindrical Luneberg Lens Antennas Through Dyadic Green’s Functions

Zhang, Zhe; Yang, Shiwen; Chen, Yikai; Qu, Shi‐Wei; Hu, Jun

doi:10.1109/tmtt.2018.2856239

Cited by 15 publications

(11 citation statements)

References 39 publications

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“…Hence, the transmission modes on the aperture are only TE 0n and TM 0n . In addition, due to the results of M (1) so0n = 0 in [23], it means that when d <0.5λ TE 0n do not exist in this structure. In addition, for the application in this paper, d ≈0.3λ and the lens antenna is excited by R620 with TE10 mode excited as the dominant mode.…”

Section: Feasibility Analysis Of Extremely Flat Beams For Cylindrical Lens Antennasmentioning

confidence: 95%

“…The optimized parameters are the permittivity ε i , radius r i , and focal length l. The optimization procedure loop starts with an initial population. After each iteration of the optimization loop, the radiation characteristics of each lens antenna generated by DE algorithm are obtained through the Dyadic Green's Functions (DGF) analysis approach proposed in [23]. Then, these radiation characteristics are used to evaluate performances of lens antennas by using an objective function whose value is called fitness.…”

Section: Optimization Proceduresmentioning

confidence: 99%

“…For a cylindrical lens antenna optimized in this paper, according to the Eq. ( 16)-( 18) in [23], the electric fields on the aperture, a surface located in the region 1, are expressed in the form of the vector wave functions M (1) somn i.e. TE mn modes with respect toẑ) and N (1) semn i.e.…”

Section: Feasibility Analysis Of Extremely Flat Beams For Cylindrical Lens Antennasmentioning

confidence: 99%

“…( 15)-( 18) and the dot product in Eq. ( 3) and ( 11) in [23], the modes TE mn are rarely excited. Thus, the electric field in lens antenna should be vertically polarized and along z-axis.TM 0n modes are the dominant modes, and the cross polarization is very low due to the evanescent modes of TE mn .…”

Section: Feasibility Analysis Of Extremely Flat Beams For Cylindrical Lens Antennasmentioning

confidence: 99%

“…In this paper, we firstly present a design optimization method to synthesize cylindrical lens antennas based on a DE algorithm and the fast analysis method in [23]. Following the proposed methodology, an extremely flat-beam and largesized cylindrical lens antenna operating at 60 GHz is optimized for the future realization of 2-D and wide-angle lens antenna arrays.…”

Section: Introductionmentioning

confidence: 99%

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A Cylindrical Lens Antenna With Extremely Flat Beams

et al. 2019

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This paper presents an extremely flat-beam cylindrical lens antenna with a 180 mm (36 λ) diameter lens at 60 GHz. The parameters of lens antennas in the horizontal plane i.e. dielectric constants, radii, and focal length are optimized to widen beams in the vertical plane while obtaining pencil beams in the horizontal plane. The optimization procedure consists of a theoretical method and differential evolution (DE) algorithm. This beam-widening idea is analyzed and proved to be feasible owing to cylindrical apertures, which is quite different from the results of antennas with planar apertures. Then, the permittivity distribution which results in an extremely flat beam is investigated and shows a novel S-shape rather than following either the law of modified Luneberg lens or the Luneberg's Law. Finally, the proposed lens antenna is fabricated and measured. At the design frequency of 60 GHz, the measured 3-dB E-and H-plane beamwidths separately are 100.4 • and 2.3 • . As compared to the gain peak, the measured and simulated gain drop at ±60 • in the E-plane are less than 4 dB and 5 dB, respectively. Measured results show good agreements with the simulated results, thus validating the extremely flat beam of the proposed lens antenna and the effectiveness of the optimization procedure.INDEX TERMS Cylindrical lens antenna, design optimization, differential evolution, extremely flat beam.

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Section: Feasibility Analysis Of Extremely Flat Beams For Cylindrical Lens Antennasmentioning

confidence: 95%

Section: Optimization Proceduresmentioning

confidence: 99%

Section: Feasibility Analysis Of Extremely Flat Beams For Cylindrical Lens Antennasmentioning

confidence: 99%

Section: Feasibility Analysis Of Extremely Flat Beams For Cylindrical Lens Antennasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Cylindrical Lens Antenna With Extremely Flat Beams

et al. 2019

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Design of conformal inhomogeneous lens antenna using critical angle theorem and mapping of parabolic coordinate

Taskhiri,

Fakhte

2024

Opt Quant Electron

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Design and analysis of Maxwell fisheye lens based beamformer

Abbasi

Ansari

Machado

et al. 2021

Sci Rep

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Antenna arrays and multi-antenna systems are essential in beyond 5G wireless networks for providing wireless connectivity, especially in the context of Internet-of-Everything. To facilitate this requirement, beamforming technology is emerging as a key enabling solution for adaptive on-demand wireless coverage. Despite digital beamforming being the primary choice for adaptive wireless coverage, a set of applications rely on pure analogue beamforming approaches, e.g., in point-to-multi point and physical-layer secure communication links. In this work, we present a novel scalable analogue beamforming hardware architecture that is capable of adaptive 2.5-dimensional beam steering and beam shaping to fulfil the coverage requirements. Beamformer hardware comprises of a finite size Maxwell fisheye lens used as a scalable feed network solution for a semi-circular array of monopole antennas. This unique hardware architecture enables a flexibility of using 2 to 8 antenna elements. Beamformer development stages are presented while experimental beam steering and beam shaping results show good agreement with the estimated performance.

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Fast Analysis of Parallel-Plate Cylindrical Luneberg Lens Antennas Through Dyadic Green’s Functions

Cited by 15 publications

References 39 publications

A Cylindrical Lens Antenna With Extremely Flat Beams

A Cylindrical Lens Antenna With Extremely Flat Beams

Design of conformal inhomogeneous lens antenna using critical angle theorem and mapping of parabolic coordinate

Design and analysis of Maxwell fisheye lens based beamformer

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