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Nair, Ashwita (author)Lens array architectures are being developed for high frequency applications such as phased arrays for 5G point-to-point communications, Fly’s Eye lens arrays for wideband wireless communications and scanning phased arrays at sub-millimeter wavelengths. Each of these applications employ different feed configurations, lens geometries and require...master thesis 2021
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Arias Campo, M. (author)The expanding demand for high-speed wireless communications is pushing current networks and systems close to their limits. The use of sub-THz bands, where large bandwidth is available, is pointed out as one of the key strategies to cope with the huge amount of data transfer in the next Beyond 5G and 6G communications generations. Despite the...doctoral thesis 2021
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Alonso Del Pino, M. (author), Bosma, S. (author), Jung-Kubiak, Cecile (author), Chattopadhyay, Goutam (author), Llombart, Nuria (author)In this article, we propose a hybrid electromechanical scanning lens antenna array architecture suitable for the steering of highly directive beams at submillimeter wavelengths with field-of-views (FoV) of ±25°. The concept relies on combining electronic phase shifting of a sparse array with a mechanical translation of a lens array. The use...journal article 2021
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Arias Campo, M. (author), Holc, Katarzyna (author), Weber, Rainer (author), De Martino, C. (author), Spirito, M. (author), Leuther, Arnulf (author), Bruni, Simona (author), Llombart, Nuria (author)Thanks to the large bandwidth availability, millimeter and sub-millimeter wave systems are getting more attractive to be used in a wide range of applications, such as high-resolution radar or high-speed communications. In this contribution, a new lens antenna in-package solution is presented for the H-band (220320 GHz), including a wideband...journal article 2021
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Arias Campo, M. (author), Carluccio, G. (author), Blanco, Darwin (author), Litschke, Oliver (author), Bruni, Simona (author), Llombart, Nuria (author)In this contribution, a broadband G-band leaky-wave (LW) fed lens antenna with an integrated dielectric grid polarizer is presented. The proposed wideband polarizer unit cell geometry enables its fabrication at frequencies higher than 100 GHz, presenting high transmission properties and low axial ratio (AR). A quasi-Analytic technique based...journal article 2021
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Zhang, H. (author), Bosma, S. (author), Neto, A. (author), Llombart, Nuria (author)A dual-polarized 4 x 4 scanning phased array antenna with leaky-wave enhanced lenses operating at 28 GHz is presented. Such an antenna can be used for point-to-point fifth-generation (5G) communications that require high gain, wide bandwidth (BW), and limited steering ranges. The proposed array has a periodicity of two wavelengths, and the...journal article 2021
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Arias Campo, M. (author), Carluccio, G. (author), Bruni, Simona (author), Llombart, Nuria (author)Low relative permittivity plastic elliptical lenses in combination with integrated focal plane arrays are a promising solution to be used in the future mm- and sub-mm-wave systems. Their appeal lies in the availability of materials with moderate loss and lightweight, and the possibility to use cost-effective manufacturing techniques. However,...journal article 2021
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- Dabironezare, Shahab Oddin (author) doctoral thesis 2020
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Tokan, F. (author), Cavallo, D. (author), Neto, A. (author)Three-dimensional body scanning systems are increasingly used in sensitive public areas such as airports. By providing a high resolution image of a person from all sides, it is possible to detect potential metallic, ceramic and explosive threats. For these systems, it is essential to design broadband antennas with a fan beam, highly directional...journal article 2020
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Arias Campo, M. (author), Blanco, Darwin (author), Neto, A. (author), Llombart, Nuria (author), Bruni, Simona (author)In order to fulfill the exponential increase in the demand of high-speed wireless links, future XG wireless networks will be developed at higher carrier signal frequencies, reaching the hundreds of gigahertz. In this contribution, a leaky-wave-fed HDPE lens antenna working at ${G}$ -band which can be useful for future XG communications is...journal article 2020
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Dabironezare, Shahab Oddin (author), Carluccio, G. (author), Freni, Angelo (author), Neto, A. (author), Llombart, Nuria (author)Future sub millimeter imagers are being developed with large focal plane arrays (FPAs) of lenses to increase the field of view (FoV) and the imaging speed. A full-wave electromagnetic analysis of such arrays is numerically cumbersome and time-consuming. This article presents a spectral technique based on Fourier optics combined with...journal article 2020
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Arias Campo, M. (author), Blanco Montero, D.J. (author), Carluccio, G. (author), Litschke, Oliver (author), Bruni, Simona (author), Llombart, Nuria (author)The exponentially increasing demand for highspeed wireless links can be only efficiently satisfied with the development of future XG wireless communication networks, based on higher carrier signal frequencies, starting from 100 GHz. In this contribution, a circularly polarized G-band leaky-wave fed lens antenna with an integrated dielectric...conference paper 2018
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Yurduseven, O. (author), Bueno Lopez, J. (author), Yates, Stephen (author), Neto, A. (author), Baselmans, J.J.A. (author), Llombart, Nuria (author)There is an increasing demand for large format detector arrays with large bandwidths and high antenna efficiencies for future THz astronomical radiometric applications. For direct detection instruments, it is also desired to have antennas with dual polarization reception in order to increase the received power from incoherent sources, thereby...journal article 2018
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Garufo, A. (author)In recent years, Terahertz technology has attracted the interest of researchers for its potential applications in a variety of domains. In particular, THz sensing has found application in security screening, medical imaging, spectroscopy, and non-destructive testing. The emergence of all these applications has been driven by the availability of...doctoral thesis 2017
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van Berkel, S.L. (author), Yurduseven, O. (author), Freni, Angelo (author), Neto, A. (author), Llombart, Nuria (author)In millimeter and submillimeter-wave radiometric imaging systems, a persistent goal is the increase in the speed of acquisition of the image while maintaining a high sensitivity. Typically, the highest sensitivity is achieved by cryogenically cooling the detectors, specifically in astronomical applications. However, for the purpose of low...journal article 2017
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Garufo, A. (author), Llombart, Nuria (author), Neto, A. (author)In this paper, the performance of logarithmic spiral antennas as feeds of dense dielectric lens are investigated in detail. The performances are evaluated in terms of clean symmetric radiation patterns, high polarization purity, antenna efficiency, and radiation dispersivity. A logarithmic spiral antenna placed in the dielectric-air interface...journal article 2016
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Alonso Del Pino, M. (author), Reck, Theodore (author), Lee, Choonsup (author), Jung-Kubiak, Cecile (author), Llombart, Nuria (author), Mehdi, Imran (author), Chattopadhyay, Goutam (author)This article presents the latest developments of our work related to a micro-lens antenna integrated in a heterodyne receiver using silicon micromachining technology at Terahertz frequencies. The antenna is composed of a waveguide feed which uses a leaky wave cavity to enhance the directivity and illuminate a shallow lens efficiently. The...conference paper 2016
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Yurduseven, O. (author), Llombart, Nuria (author), Neto, A. (author)This paper presents the design and measurements of a wideband dual polarized leaky lens antenna suitable for tightly spaced focal plane arrays. The antenna is composed of two crossed leaky slots fed by two orthogonal microstrips to realize the dual-polarization operation. The crossed microstrips are fed differentially in order to couple the...journal article 2016
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Yates, S.J.C. (author), Baselmans, J.J.A. (author), Endo, A. (author), Janssen, R.M.J. (author), Ferrari, L. (author), Diener, P. (author), Baryshev, A.M. (author)Microwave kinetic inductance detectors (MKIDs) have shown great potential for sub-mm instrumentation because of the high scalability of the technology. Here, we demonstrate for the first time in the sub-mm band (0.1–2 mm) a photon noise limited performance of a small antenna coupled MKID detector array and we describe the relation between photon...journal article 2011
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