Searched for: subject:"Radar"
(1 - 20 of 594)

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Alistarh, C. (author), Anitori, L. (author), Podilchak, S.K. (author), Thompson, J. (author), Hilario, P.D. (author), Sellathurai, M. (author), Goussetis, G. (author), Lee, J. (author)
Automotive engineers are repeatedly faced with the issue of choosing radars with the best angular resolution while having reduced processing times. In this paper, a novel extrapolation method is presented to estimate the amplitudes and phases for virtual antenna elements at the receiver periphery. This method has shown to resolve two targets...
conference paper 2021
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Dijk, J. (author), van den Broek, S.P. (author), den Hollander, R.J.M. (author), Baan, J. (author), ten Hove, J.M. (author), Oorbeek, D. (author)
conference paper 2021
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de Martin, L. (author), van Rossum, W. (author), Ribeiro, D. (author), Anitori, L. (author)
It is well known that noise-like waveforms have the inherent property of suppressing ambiguities due to their nonrepetitive nature, as opposed to the more classical linear frequency modulated (LFM) pulsed waveforms. This aperiodicity also improves the robustness against jammers, making these waveforms harder to detect and classify by an enemy....
article 2020
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Cox, P.B. (author), van Rossum, W.L. (author)
Recent advances in digital beam forming for phased arrays in combination with digital signal processing should enable the development of multibeam radar in a bistatic configuration. In the bistatic setting, the pulse travelling outward from the transmitter should be followed or “chased” by the receiver. During transmission, depending on the...
conference paper 2020
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van Rossum, W.L. (author), Anitori, L. (author)
In this article a novel waveform based on agile (or irregular) pulse intervals is presented as a potential approach to simultaneously resolve both range and Doppler ambiguities using a single burst in radar measurements containing very far away and/or very fast targets. The paper shows that, the combination of irregularly spaced transmitted...
conference paper 2020
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de Wit, J.J.M. (author), Gusland, D. (author), Trommel, R.P. (author)
The use of drones grows rapidly, recreational and commercial use, as well as malicious use. Following the trend of increasing use, there is an increasing need for radar systems to detect, track and characterize drones. Drone characterization, i.e., extracting information about the payload and intent of a drone, is crucial for the effective...
conference paper 2020
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de Jong, R.J. (author), Heiligers, M.J.C. (author), de Wit, J.J.M. (author), Uysal, F. (author)
Camera systems are widely used for surveillance in the security and defense domains. The main advantages of camera systems are their high resolution, their ease of use, and the fact that optical imagery is easy to interpret for human operators. However, particularly when considering application in the defense domain, cameras have some...
conference paper 2019
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Premel-Cabic, G. (author), de Wit, J.J.M. (author), Cuenca, M. Caro (author)
The ALFA project aims at timely detection, tracking, classification, and intent assessment of LSS targets. The system relies on a heterogeneous sensor suite, including radar. The objective of the radar component is sector surveillance including target classification. Since the revisit time needs to be short, classification must be done with very...
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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Devecchi, B.A. (author), Benoist, K.W. (author), Scheers, L.C.W. (author), Veerman, H.E.T. (author), Binsbergen, S.A. (author), van Eijk, A.M.J. (author)
Infrared imaging of the sea surface is used for many purposes, such as remote sensing of large oceanographic structures, environmental monitoring, surveillance applications and platform signature research. Many of these studies rely on determining the contrast of a target feature with its background and therefore benefit from accurately...
conference paper 2019
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Genderen, P.V. (author), Stolp, E. (author), Heebels, G. (author)
This paper addresses the early developments that have resulted in the design and development of active electronically scanned arrays (AESA) in The Netherlands. An early type of radar measuring the position of objects in range, azimuth and elevation in three dimensions (SPS-01/MTTR) is described in some detail. Requirements of the Royal...
conference paper 2019
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Otten, M.P.G. (author), Maas, A.P.M. (author), Bolt, R.J. (author), Caro-Cuenca, M. (author), Medenblik, H. (author)
This paper presents a new multifunction radar that was specially designed for mini-UAV platforms. The multi-channel radar is omnidirectional, allowing great flexibility in radar- and flight operations. A demonstrator has been built, weighing 800 grams, and consuming 25 W. Flexible SAR, GMTI and novel sensing modes can be demonstrated with this...
conference paper 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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Ruiz-Constán, A. (author), Ruiz-Armenteros, A.M. (author), Martos-Rosillo, S. (author), Galindo-Zaldívar, J. (author), Lazecky, M. (author), García, M. (author), Sousa, J.J. (author), Sanz de Galdeano, C. (author), Delgado-Blasco, J.M. (author), Jiménez-Gavilán, P. (author), Caro-Cuenca, M. (author), Luque-Espinar, J.A. (author)
This research underlines the need to improve water management policies for areas linked to confined karstic aquifers subjected to intensive exploitation, and to develop additional efforts towards monitoring their subsidence evolution. We analyze subsidence related to intensive use of groundwater in a confined karstic aquifer, through the use of...
article 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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Bryllert, T. (author), Svedin, J. (author), Karlsson, M. (author), Gandini, E. (author), Llombart, N. (author), Drakinskiy, V. (author), Stake, J. (author)
We present a 220 GHz imaging radar prototype that has been developed in the European Defense Agency (EDA) project TIPPSI. The purpose of the development was to demonstrate short-range high-resolution 3D imaging for security applications at checkpoints, and to guide the development of stand-off real-time millimeter wave and sub-millimeter wave...
conference paper 2018
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Bultink, C.C. (author), Tarasinski, B. (author), Haandbæk, N. (author), Poletto, S. (author), Haider, N. (author), Michalak, D.J. (author), Bruno, A. (author), DiCarlo, L. (author)
We present and demonstrate a general three-step method for extracting the quantum efficiency of dispersive qubit readout in circuit QED. We use active depletion of post-measurement photons and optimal integration weight functions on two quadratures to maximize the signal-to-noise ratio of the non-steady-state homodyne measurement. We derive...
article 2018
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Heijningen, M. (author), Essing, J. (author), van Vliet, F.E. (author)
In the transmit chain of high-power phased-array radars more and more use is made of Gallium-Nitride (GaN) high-power amplifiers (HPAs), while in the receive chain there is a trend to move to integrated silicon (Si) based components. The GaN amplifiers usually require a relatively high input power, making it necessary to include a medium power...
conference paper 2018
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de Wit, J.J.M. (author), van Rossum, W.L. (author)
A sensor network has been developed consisting of four RF nodes that automatically set up a network organization and synchronize wirelessly. In the system bistatic backscatter and forward scatter radar measurements are combined. For detection of small and slow targets, like humans, suppression of the background including the direct signals...
conference paper 2018
Searched for: subject:"Radar"
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