Electromagnetic Modeling of Spherically Stratified Lenses Illuminated by Arbitrary Sources

Šipuš, Zvonimir; Bojanjac, Dario; Komljenović, Tin

doi:10.1109/tap.2015.2394801

Cited by 12 publications

(4 citation statements)

References 14 publications

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“…According to the Snell’s law, the refractive index in a vacuum is 1 and let the refractive index in the Lens be n . Then, the refractive index in the Lens can be expressed as [ 20 ]

…”

Section: Methodsmentioning

confidence: 99%

Miniaturized Lens Antenna with Enhanced Gain and Dual-Focusing for Millimeter-Wave Radar System

Wang,

Duan,

Shen

et al. 2024

Micromachines

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This paper presents a waveguide Lens antenna at the W-band adopting dual-focusing Lens to improve the performance. The Lens antenna consisted of a waveguide slotted structure and lenses processed using NOA73 meet the demands of miniaturization for current communication systems. The antenna radome fabricated using NOA73 not only protects the antenna structure but also improves the gain of the antenna by about 9.5 dBi via electromagnetic wave dual-focusing. A prototype is fabricated using novel UV-LIGA technology. Measured results are compared with simulated values. Measured results confirmed the fabricated antenna operated in the W-band with a 10 dB fractional bandwidth (FBW) of 6.5% from 97.5 to 104 GHz and a peak gain of 22 dBi at 100 GHz in the direction perpendicular to the plane of the feed waveguide. A good agreement between simulation and measurement is obtained, demonstrating efficient radiations in the operating band.

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“…According to the Snell’s law, the refractive index in a vacuum is 1 and let the refractive index in the Lens be n . Then, the refractive index in the Lens can be expressed as [ 20 ]

…”

Section: Methodsmentioning

confidence: 99%

Miniaturized Lens Antenna with Enhanced Gain and Dual-Focusing for Millimeter-Wave Radar System

Wang,

Duan,

Shen

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…4 Therefore, by adjusting the position of the feed outside the lens surface, the multibeam coverage with good beam accordance can be achieved. [5][6][7] The conventional LLA is generally manufactured by the foam technology to produce layered spherical shells, which are later stitched together. However, it tends to be bulky, weighty, and complicated to fabricate.…”

Section: Introductionmentioning

confidence: 99%

“… 1–3 The spherical Luneburg lens antenna (LLA) is a type of lens antenna with a rotationally symmetric structure, where each point on the lens surface can be considered as a focal point 4 . Therefore, by adjusting the position of the feed outside the lens surface, the multibeam coverage with good beam accordance can be achieved 5–7 …”

Section: Introductionmentioning

confidence: 99%

A 3‐D ‐printed Luneburg lens antenna with consistent multibeams based on quasi‐pyramid structure

Zang

Zhu

Xie

et al. 2022

Int J RF Mic Comp-Aid Eng

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A wide-scanning dual-polarized Luneburg lens antenna based on the quasipyramid structure is proposed. To achieve beam consistency, 18 identical quasi-pyramid sections are employed to approximate a spherical lens antenna, and each section is divided into 12 layers. The 6-stepped gradient permittivity index is achieved by the diced ring-type periodic unit cells in accordance with the Effective Medium Theory. Each quasi-pyramid is incorporated with the same connecting structure to form an integrity. And a dielectric rod is penetrated parallelly to the center axis of the lens, thus improving the robustness of the overall structure. The radius of the whole lens is merely 0.88λ 0 . The spherical Luneberg lens antenna is fabricated and measured, with an impedance bandwidth of 45.5%, a measured peak gain of 15.4/15.1 dBi and a cross-polarization level of higher than 17/17.5 dB.Placing the feed antenna at different locations during the measurement, results attest that those beams possess an excellent consistency. The multibeams are able to achieve an ultra-wide beam coverage of 165 , promising it a serviceable candidate for mobile communication base stations and wireless networking.

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“…Las lentes esféricas tienen propiedades muy interesantes, dada su simetría de revolución. Se pueden utilizar múltiples alimentadores primarios que comparten la misma lente para producir haces que apuntan en diferentes direcciones [27,28]. Esta clase de lentes son encontradas en la literatura hacia 1940, donde se consideraban dos clases de esas lentes: las lentes deíndice constante y las deíndice variable o lente de Luneburg [29].…”

Section: Estado Del Arte Sobre Lentesunclassified

Diseño de lentes metálicas usando la teoría de modos característicos.

Haro¹,

Antonio²

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Electromagnetic Modeling of Spherically Stratified Lenses Illuminated by Arbitrary Sources

Cited by 12 publications

References 14 publications

Miniaturized Lens Antenna with Enhanced Gain and Dual-Focusing for Millimeter-Wave Radar System

Miniaturized Lens Antenna with Enhanced Gain and Dual-Focusing for Millimeter-Wave Radar System

A 3‐D ‐printed Luneburg lens antenna with consistent multibeams based on quasi‐pyramid structure

Diseño de lentes metálicas usando la teoría de modos característicos.

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