Design Considerations in a Graded Index Flat Dielectric Lens for an Impulse Radiating Antenna

Albarracin-Vargas, Fernando; Vega-Stavro, Felix; Baer, Christoph; Orend, Kerstin; Musch, Thomas

doi:10.1109/apusncursinrsm.2019.8889342

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…However, for some antenna applications such as biomedical imaging system [20], and through wall-imaging system [21] the planar wave is preferable instead of the spherical waves. The planar waves propagate signal into one direction so that the signal more directive compared to the spherical waves [22][23][24]. One of the approaches to correct the signal from spherical to planar wave is phase correction technique [25].…”

Section: Phase Correction Techniquementioning

confidence: 99%

Flat lens design using phase correction technique for horn antenna applications

Razak¹,

Hussain²,

Noordin³

et al. 2021

TELKOMNIKA

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A design of a flat dielectric lens is presented in this study to enhance directivity of a pyramidal horn antenna. The horn antenna is proposed to cover frequency of medical imaging system, which is between 5 and 6 GHz, and dielectric lens is designed based on phase correction techniques. The spherical waves produced by conventional horn antenna is being transform to planar waves by resorting flat lens in order to achieve a highly directive radiation in the farfield region. This is done by drilling numerous holes with different diameters through the dielectric material to produce different phase delay. The radiation characteristics of the lens are simulated using CST Microwave Studio and then compared with measured results. The results showed a good performance for radiation pattern when the lens is attached. This proposed design shows a significant increment of sidelobe level and 3-dB beamwidth between 5 and 6 GHz.

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Section: Phase Correction Techniquementioning

confidence: 99%

Flat lens design using phase correction technique for horn antenna applications

Razak¹,

Hussain²,

Noordin³

et al. 2021

TELKOMNIKA

View full text Add to dashboard Cite

show abstract

“…In addition, the air gap size can have a significant effect on the performance of the lens, especially on the focal distance. The limitation related to the air-gabs was solved in [22]. Researchers in this recently published paper utilized dielectric slabs that have the same widths, different thicknesses, and different lengths.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Slabs-Based Lens for Millimeter-Wave Beamforming

2022

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This paper proposes a dielectric slabs-based lens for millimeter-wave beamforming systems. The proposed lens is based on the graded steps of the effective refractive index of the semi-spherical lens. It consists of multiple dielectric slabs that match the selected gradient effective refractive index. These slabs have the same thicknesses and different radii. The slab thickness in this lens should not exceed a quarter of the operating wavelength to keep on a similar effective refractive index of the original semi-spherical lens. A horn antenna is used to examine the performance of the designed lens at 28 GHz frequency in terms of the maximum gain, sidelobe level, and 3 dB beamwidth. Sixteen switchable horn antennas are used to demonstrate lens capability for millimeter-wave beamforming. Every single antenna element is selected individually, thus the dielectric lens steers and enhances the corresponding radiation of the selected element in the desired direction.

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