Searched for: author%3A%22Monni%2C+S.%22
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Garuffo, A. (author), Bolt, R.J. (author), Suijker, E. (author), Kaminski, P. (author), Geurts, M. (author), Acar, M. (author), Bergman, J.W. (author), Mandamparambil, R. (author), Monni, S. (author)
This article presents latest developments on mm-wave microstrip antennas in package at TNO. Two designs examples for 5G applications are presented: a 28 GHz Antenna in Package (AiP) module for mobile handset and a 26 GHz array antenna for base stations (BS), both in dual linear polarization. The AiP module consists of 2 linear arrays for...
conference paper 2021
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Monni, S. (author)
public lecture 2021
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Yepes, C. (author), Gandini, E. (author), Monni, S. (author), Neto, A. (author), van Vliet, F.E. (author), Cavallo, D. (author)
In this letter, we present a design of a linear array of tilted dipoles to achieve radiation patterns with asymmetric angular filtering characteristics. To realize the asymmetric radiation, the dipole elements are spaced by a distance larger than half a wavelength, thus allowing for grating lobes to occur in the visible region. Moreover, the...
article 2020
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Gandini, E. (author), Silvestri, F. (author), Benini, A. (author), Gerini, G. (author), Martini, E. (author), Maci, S. (author), Vigano, M.C. (author), Toso, G. (author), Monni, S. (author)
The design and experimental validation of a wide scanning dome antenna with reduced profile is presented. The antenna is based on the combination of a planar phased array with limited scanning capabilities and a dielectric lens which allows to broaden the field of view. The angular variation of the scan loss can be almost arbitrarily designed if...
article 2020
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van Heijningen, M. (author), Bekers, D.J. (author), Gandini, E. (author), Grooters, R. (author), Jacobs, S. (author), Bolt, R.J. (author), Monni, S. (author)
TNO has a long heritage in the research and development of radio frequency (RF) and microwave technology for phased array systems, ranging from high-level system design to hardware design, including integrated circuits and antennas. Customers include the Dutch ministries, the European Union (EU) and the European Space Agency (ESA). Innovative RF...
article 2019
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Yepes, C. (author), Neto, A. (author), Cavallo, D. (author), Gandini, E. (author), van Vliet, F.E. (author), Monni, S. (author)
We present the design of an array of tilted dipoles loaded with artificial dielectrics, to achieve asymmetric radiation patterns. First, a simplified array element consisting of skewed stacked dipoles in the presence of a backing reflector is studied, by means of a dedicated spectral periodic method of moments (MoM). The analysis of the stacked...
conference paper 2019
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Bekers, D.J. (author), Jacobs, S. (author), Monni, S. (author), Bolt, R.J. (author), Fortini, D. (author), Capece, P. (author), Toso, G. (author)
The article presents the design of a Ka-band synthetic aperture radar (SAR) instrument based on innovative phased-array antennas, with steering capability in azimuth and elevation. To limit the complexity and costs associated with conventional large active arrays with regular layouts, a sparse array concept is presented. The proposed approach...
article 2019
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Pairon, T. (author), Karki, S. (author), Monni, S. (author), Craeye, C. (author)
A fully metallic monopole element is proposed for satellite SAR antennas. This element has significant gain in the broadside direction thanks to its curved arm. This element is then studied in a large sparse array. A fast analysis technique is presented in order to solve for the currents of few hundreds elements, which correspond approximately...
conference paper 2019
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Yepes, C. (author), Gandini, E. (author), Monni, S. (author), van Vliet, F.E. (author), Neto, A. (author), Cavallo, D. (author)
In this work, we present a study on the radiation and impedance properties of antenna arrays with tilted elements. We developed a spectral method of moments (MoM) for the analysis of doubly-periodic arrays with arbitrarily tilted dipole or stacked dipole elements, in free space or in the presence of a backing reflector. By using this analysis...
conference paper 2019
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Gandini, E. (author), Silvestri, F. (author), Benini, A. (author), Gerini, G. (author), Martini, E. (author), MacI, S. (author), Viganò, M.C. (author), Toso, G. (author), Monni, S. (author)
A wide scanning dome antenna with reduced profile is presented in this contribution. The minimum height of the dielectric lens is derived from its geometrical configuration and imposed in the design. The antenna is analysed using in-house ray tracing and physical optics tools. Because of the presence of the lens, the phase distribution of the...
conference paper 2019
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Yepes, C. (author), Cavallo, D. (author), Gandini, E. (author), Monni, S. (author), Neto, A. (author), van Vliet, F.E. (author)
five-layer frequency selective surface (FSS) composed of subwavelength elements with large harmonic rejection bandwidth is presented. The FSS design is based on an equivalent circuit model, where the interlayer interaction is only described with a single transmission line representing the fundamental Floquet wave. A prototype of the designed FSS...
article 2018
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Yepes, C. (author), Gandini, E. (author), Dijk, R.V. (author), Bruning, F. (author), Maalderink, H. (author), Monni, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
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Galgani, G. (author), Scozza, G. (author), Bolt, R.J. (author), Haider, N. (author), Monni, S. (author), Delbary, F. (author)
In this work we present the first phase results in the design of a fixed beam dual-polarized antenna at X-band for a polarimetric weather radar to be mounted on aircraft. Such a radar is not yet existent. Requirements pertinent to the application are presented and the different antenna system components described together with their simulated...
conference paper 2018
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Capece, P. (author), Fortini, D. (author), Bekers, D.J. (author), Jacobs, S. (author), Monni, S. (author), Toso, G. (author)
A novel sparse layout for the receiving aperture of a Ka-band spaceborne SAR has been designed. The devised array antenna layout allows reducing the number of active controls of 40%, from 10000 to 6000. The antenna is designed to steer the beam ±10° in elevation and ±2° in azimuth, and satisfies the prescribed pattern mask. In this paper, after...
conference paper 2018
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Bekers, D.J. (author), Jacobs, S. (author), Bolt, R.J. (author), Monni, S. (author), Fortini, D. (author), Germani, C. (author), Capece, P. (author), Toso, G. (author)
In this paper a novel sparse layout for the radiating aperture of a Ka-band spaceborne SAR is outlined. Starting from a set of typical requirements and the definition of a benchmark antenna, an approach to achieve sparsity (in terms of the number of active modules) is proposed, which reduces significantly the fill factor as compared to the...
conference paper 2017
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Silvestri, F. (author), Benini, A. (author), Gandini, E. (author), Gerini, G. (author), Martini, E. (author), Maci, S. (author), Vigano, M.C. (author), Geurts, M. (author), Toso, G. (author), Monni, S. (author)
This paper presents design considerations for the development of wide-scanning antennas for on-craft satellite communications. A scanning coverage of 80° is required for this application over a 15% fractional bandwidth in Ka-band. A solution based on a phased array illuminating a passive superstrate is identified as the most promising. A fully...
conference paper 2017
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Silvestri, F. (author), Gerini, G. (author), Gandini, E. (author), Monni, S. (author), Viganò, M.C. (author), Benini, A. (author), Martini, E. (author), Maci, S. (author), Toso, G. (author)
Design considerations on a wide-scanning array antenna for on-craft satellite communications are presented in this paper. For this type of application, a scanning coverage of 80° over a 15% fractional bandwidth in Ka-band is required. A solution based on a passive superstrate illuminated by a phased array is recognized as the most encouraging....
conference paper 2017
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Yepes, C. (author), Cavallo, D. (author), Neto, A. (author), Gandini, E. (author), Monni, S. (author), van Vliet, F.E. (author)
conference paper 2017
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Galgani, G. (author), Scozza, G. (author), Bolt, R.J. (author), Haider, N. (author), Monni, S. (author), Delbary, F. (author)
In this work we present the first phase results in the design of a fixed beam dual-polarized antenna at X-band for a polarimetric weather radar to be mounted on aircraft. Such a radar is not yet existent. Requirements pertinent to the application are presented and the different antenna system components described together with their simulated...
conference paper 2017
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Deiana, D. (author), Nennie, F. (author), Boekema, R.B. (author), van Rossum, W. (author), Monni, S. (author)
N-path filters exploiting switched-series-R-C networks can realize high-Q blocking-tolerant band-pass filters. Moreover, their center frequency is flexibly programmable by a digital clock. Unfortunately, the time variant nature of these circuits also results in unwanted signal folding. This paper proves analytically that folding can be reduced...
conference paper 2017
Searched for: author%3A%22Monni%2C+S.%22
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