KD
Kostas Doris
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4 records found
1
Conference paper
(2025)
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A. Nair, G. Carluccio, W. Syed, M. Alonso Del Pino, D. Cavallo, K. Doris, N. Llombart
In this work we present a fully electronic lens phased array that can continuously scan a moderate field of view of 18° with an angular resolution of ~1°. The fabricated lens array along with its preliminary measurement results are presented in this paper.
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In this work we present a fully electronic lens phased array that can continuously scan a moderate field of view of 18° with an angular resolution of ~1°. The fabricated lens array along with its preliminary measurement results are presented in this paper.
Conference paper
(2025)
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J. Geng, N. Llombart, W.H. Syed, G. Carluccio, H. Nandagopal, M. Alonso-delPino, K. Doris, D. Cavallo
We introduce the design of an array-fed dielectric lens antenna that enables electronic beam steering within a large Field of View (FoV). The feed array consists of eight cavity-backed double-slot antenna elements, fed by a microstrip feed structure that tilts the beam of each double slot toward the lens center. The slots are loaded with a two Artificial Dielectric Layers (ADL) to increase the front-to-back ratio. The elements are placed closer to the lens surface with respect to the nominal focal plane and are combined with proper weights to reduce the scan loss. Metallic reflectors are positioned along the sides of the array edges to further improve the scanning performance, especially at large scan angles. Full-wave simulations show that the designed antenna realizes a stable gain around 20 dBi within a ±50° FoV coverage, for a lens diameter of 5 wavelengths.
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We introduce the design of an array-fed dielectric lens antenna that enables electronic beam steering within a large Field of View (FoV). The feed array consists of eight cavity-backed double-slot antenna elements, fed by a microstrip feed structure that tilts the beam of each double slot toward the lens center. The slots are loaded with a two Artificial Dielectric Layers (ADL) to increase the front-to-back ratio. The elements are placed closer to the lens surface with respect to the nominal focal plane and are combined with proper weights to reduce the scan loss. Metallic reflectors are positioned along the sides of the array edges to further improve the scanning performance, especially at large scan angles. Full-wave simulations show that the designed antenna realizes a stable gain around 20 dBi within a ±50° FoV coverage, for a lens diameter of 5 wavelengths.
Conference paper
(2025)
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A. Nair, G. Carluccio, W. Syed, H. Nandagopal, M. Alonso-delPino, D. Cavallo, K. Doris, N. Llombart
This paper presents a distributed radar system architecture designed for sensing applications above 100GHz. The proposed radar system leverages high-gain lens arrays to generate extremely narrow beams, enabling high angular resolution. A hybrid beamforming approach is proposed in both the transmitter and receiver arrays, allowing for continuous scanning across a moderate field of view. Additionally, an ideal estimation of radar range is conducted assuming a simplified radar equation for this architecture, showing its potential to detect targets at very long distances.
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This paper presents a distributed radar system architecture designed for sensing applications above 100GHz. The proposed radar system leverages high-gain lens arrays to generate extremely narrow beams, enabling high angular resolution. A hybrid beamforming approach is proposed in both the transmitter and receiver arrays, allowing for continuous scanning across a moderate field of view. Additionally, an ideal estimation of radar range is conducted assuming a simplified radar equation for this architecture, showing its potential to detect targets at very long distances.
Journal article
(2023)
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Ralph van Schelven, Waqas Syed, Giorgio Carluccio, Kostas Doris, Anton de Graauw, Andrea Neto, Daniele Cavallo
In this work, we investigate antenna architectures to implement dual-mode operation in phased array designs. Planar slot antenna elements are used in array configuration, in combination with artificial dielectrics layers (ADLs) located in the close proximity of the array, to achieve pattern shaping. The artificial dielectric superstrate supports the propagation of leaky waves that can be optimized to enhance the gain in a specific angular region or to enlarge the array field of view. By controlling the amplitude and phase of the antenna elements, the radiation patterns can be combined to realize either wide or narrow beams. This concept present advantages for both millimeter-wave (mm-wave) communication and radar applications. A design of a four-element array fabricated in standard printed circuit board (PCB) technology validates the feasibility of the dual-mode operation. The measured results also show good agreement with simulations.
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In this work, we investigate antenna architectures to implement dual-mode operation in phased array designs. Planar slot antenna elements are used in array configuration, in combination with artificial dielectrics layers (ADLs) located in the close proximity of the array, to achieve pattern shaping. The artificial dielectric superstrate supports the propagation of leaky waves that can be optimized to enhance the gain in a specific angular region or to enlarge the array field of view. By controlling the amplitude and phase of the antenna elements, the radiation patterns can be combined to realize either wide or narrow beams. This concept present advantages for both millimeter-wave (mm-wave) communication and radar applications. A design of a four-element array fabricated in standard printed circuit board (PCB) technology validates the feasibility of the dual-mode operation. The measured results also show good agreement with simulations.