Planar Luneburg Lens Based on the High Impedance Surface for Effective Ku-Band Wave Focusing

Cheng, Gong; Wu, Yuming; Yin, Jun-Xiang; Zhao, Nan; Qiang, Tian; Lv, Xin

doi:10.1109/access.2018.2805805

Cited by 14 publications

(5 citation statements)

References 11 publications

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“…Recently, some fabrication methods have led to special attention to the design and use of inhomogeneous lens structures. Some of these methods are perforated dielectrics [22,[35][36][37][38], printed metasurface [39][40][41][42][43][44], 3D printed structure [45][46][47], multi printed layer [48], dielectric layered shell deposition [49], and other methods.…”

Section: Introductionmentioning

confidence: 99%

The low‐cost inhomogeneous multi‐section flat lens antenna with minimum F over D design in Ku‐band

Taskhiri

2023

IET Microwaves Antenna & Prop

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This article uses the ray inserting method to design a low‐cost inhomogeneous lens in the Ku‐band. The focal length to the diametre ratio of the designed lens is 0.45, which is lower than most designed lenses in this area. Also, no approximation is considered to yield the refractive index profile. The refractive index changes from the centre to the sides have been made in two sections to limit the maximum calculated refractive index of the structure to the Plexiglass refractive index. The designed lens proposed a good match to the source and surroundings. The theoretical design is validated by the finite difference time domain scheme and full‐wave simulation. The lens structure is realised and fabricated on a multilayer Plexiglass sheet. The results of simulations and experiments indicate good performances of the designed lens in the wide frequency bandwidth.

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Section: Introductionmentioning

confidence: 99%

The low‐cost inhomogeneous multi‐section flat lens antenna with minimum F over D design in Ku‐band

Taskhiri

2023

IET Microwaves Antenna & Prop

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“…The HIS-based wideband antenna, proposed in [10], is for 14 GHz applications. The dog-bone-shaped HIS structure, proposed in [11], is for RFID and mobile applications, while the HISbased Luneburg lens, proposed in [12], is for Ku band wave focusing applications. A wearable loop antenna fabricated over a textile surface based on HIS structure is investigated in [13].…”

Section: Introductionmentioning

confidence: 99%

Planar Antenna Design on the Characteristics of Moore Fractal-based High Impedance Surface

Gupta,

Chowdary,

Krishna

2023

ACES Journal

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This work presents a planar antenna with a rectangular shape designed over a Moore curve fractal-shaped High Impedance Surface (HIS). The Moore fractal geometries are space-filling curves and are useful for multiband applications. The Moore curve-shaped fractal HIS is simulated up to three iterations, and performance is examined. The proposed antenna has multiband operation within the S-band, C-band, and lower X-band frequency of operation. The antenna has a peak gain of 5.08 dB, 4.69 dB, and 5.07 dB with a Moore curve fractal HIS, with iterations 1, 2, and 3 used as the ground plane. The antenna has been analyzed regarding the reflection coefficient, radiation pattern, 3-D polar plots, and surface current distribution. With Moore curve iteration 1, a shaped HIS provides a maximum bandwidth of 740 MHz with the center frequency of 10.95 GHz, 1.24 GHz with the center frequency of 10.57 GHz, and 1.09 GHz with the center frequency of 12.5 GHz with the second and third iterations, respectively.

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“…However, all these approaches for processing planar Luneburg lens have the disadvantages of high cost and poor mechanical properties, which restricts their application. In order to overcome these issues, printed circuit board (PCB) has been used to fabricate Luneburg lens [7,27,28]. These devices not only reduced manufacturing costs but also made the refractive index (RI) distribution closer to idealization.…”

Section: Introductionmentioning

confidence: 99%

All-dielectric ultra broadband MIMO Luneburg lens with sub-diffraction resolution

Chen²,

Chen³

et al. 2022

J. Phys. D: Appl. Phys.

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A 3D-printed ultra-broadband planar Luneburg lens composed of periodic gradient structures is proposed in this paper. Compared to the previous studies, the proposed lens has a pretty large operating frequency range, spanning from 5 to 22 GHz. The measured results of the near-field and far-field illustrate the feasibility and validity of this lens antenna. High efficiency achromatic sub-diffraction focusing with a full-width at half-maximum (FWHM) of 0.3λ and a highly directive far-field radiation pattern with side lobes below -10 dB are achieved. Triple input and triple output function is also realized experimentally.

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Planar Luneburg Lens Based on the High Impedance Surface for Effective Ku-Band Wave Focusing

Cited by 14 publications

References 11 publications

The low‐cost inhomogeneous multi‐section flat lens antenna with minimum F over D design in Ku‐band

The low‐cost inhomogeneous multi‐section flat lens antenna with minimum F over D design in Ku‐band

Planar Antenna Design on the Characteristics of Moore Fractal-based High Impedance Surface

All-dielectric ultra broadband MIMO Luneburg lens with sub-diffraction resolution

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