Searched for: subject%3A%22Defence%255C%2BResearch%22
(1 - 20 of 767)

Pages

document
de Hek, A.P. (author), van de Bent, G. (author), van Vliet, F.E. (author)
A state-of-the-art, second harmonically tuned, 400 W S-band MMIC power amplifier has been developed. This amplifier delivers in the 2.8 – 3.3 GHz band an output power of 400 W and a PAE between 50-55%. The obtained amplifier performance is the result of the structured design approach discussed in this paper.
conference paper 2022
document
Garufo, A. (author), Carluccio, G. (author)
Analytical formulations of the active admittance and impedance of connected arrays based on dipole and slot antennas, respectively, when elements are arranged in a hexagonal lattice, are presented. Different canonical dielectric layers stratifications are considered. The formulations is based on multi-layer Green’s function spectral...
conference paper 2022
document
Marinovic, T. (author), de Villiers, D.I.L. (author), Bekers, D.J. (author), Johansson, M.N. (author), Stjernman, A. (author), Maaskant, R. (author), Vandenbosch, G.A.E. (author)
A new method is proposed to analyze antenna arrays including mutual coupling (MC), which is based on the concept of multiple scattering, and relates to the iterative Jacobi and Gauss–Seidel methods. The method employs sampled far-field data of an isolated element, which can be obtained by any full-wave simulator and consists of far fields for...
conference paper 2021
document
Anitori, L. (author), Ender, J. (author)
In the past decades, there has been an extensive research interest in the areas of both waveform diversity/design and advanced signal processing algorithms departing from the more classical solutions based on Linear Frequency Modulated (LFM) pulses and Matched Filters (MF). In the waveform diversity community, especially within the context of...
conference paper 2021
document
Burghouts, G.J. (author), Hillerström, F.H.J. (author)
Current object recognition techniques are based on deep learning and require substantial training samples in order to achieve a good performance. Nonetheless, there are many applications in which no (or only a few) training images of the targets are available, whilst they are well-known by domain experts. Zero-shot learning is used in use cases...
conference paper 2021
document
Luiijf, E. (author), Klaver, M.H.A. (author)
The disruption of a Critical Infrastructure (CI) or a Critical Information Infrastructure (CII) may have a serious impact on the society. The pervasive web of CI/CII dependencies has the potential to cause exceptional damage and societal disruption and may be hard to secure and govern. To understand the underlying threat causes of CI and CII...
article 2021
document
Malone, K.M. (author), Vissers, J.P.M. (author), Gerrits, B.M. (author), de Wit, A.F.P. (author)
Defensie kampt met een tekort aan chauffeurs in bepaalde delen van de logistieke keten. De innovaties op het gebied van truck platooning in de civiele markt kunnen hier een antwoord op bieden. Bij truck platooning zijn vrachtwagens in een konvooi elektronisch aan elkaar gekoppeld, waarbij de voorste truck de snelheid en route bepaalt en de...
article 2021
document
Westerveld, J.J.L. (author), van den Homberg, M.J.C. (author), Guimarães Nobre, G. (author), van den Berg, D.L.J. (author), Teklesadik, A.D. (author), Stuit, S.M. (author)
Food insecurity is a growing concern due to man-made conflicts, climate change, and economic downturns. Forecasting the state of food insecurity is essential to be able to trigger early actions, for example, by humanitarian actors. To measure the actual state of food insecurity, expert and consensus-based approaches and surveys are currently...
article 2021
document
Boehrer, N. (author), Nieuwenhuizen, R.P.J. (author), Dijk, J. (author)
Long-range horizontal path imaging through atmospheric turbulence is hampered by spatiotemporally randomly varying shifting and blurring of scene points in recorded imagery. Although existing software-based mitigation strategies can produce sharp and stable imagery of static scenes, it remains highly challenging to mitigate turbulence in scenes...
article 2021
document
Kentrop, J. (author), Savransky, V. (author), Klaassen, S.D. (author), van Groningen, T. (author), Bohnert, S. (author), Cornelissen, A.S. (author), Cochrane, L. (author), Barry, J. (author), Joosen, M.J.A. (author)
Nerve agent exposure is generally treated by an antidote formulation composed of a muscarinic antagonist, atropine sulfate (ATR), and a reactivator of acetylcholinesterase (AChE) such as pralidoxime, obidoxime (OBI), methoxime, trimedoxime or HI-6 and an anticonvulsant. Organophosphates (OPs) irreversibly inhibit AChE, the enzyme responsible for...
article 2021
document
Essing, J.A.J. (author), Bossuet, A. (author), Knight, R.J. (author), de Hek, A.P. (author), van Vliet, F.E. (author)
This paper describes an integrated S-band phaseshifter driver-amplifier to drive Gallium-Nitride (GaN) based power amplifiers in a phased-array radar transmit chain. This phase driver is implemented in a 0.25μm SiGe BiCMOS process and packaged into a QFN5x5. By using device stacking, the phase driver achieves an output power of more than 32.5dBm...
conference paper 2021
document
Sutmuller, A.D. (author), den Hengst, M. (author), Barros, A.I. (author), van Gelder, P. (author)
Homicide investigators in the digital era have access to an increasing amount of data and the processing of all persons of interest and pieces of evidence has become nearly impossible. This paper describes the development and evaluation of a case-specific element library (C-SEL) that can be used to incorporate and prioritize persons of interest...
article 2020
document
van Rooijen, A.L. (author), Bouma, H. (author), Pruim, R.H.R. (author), Baan, J. (author), Uijens, W.R. (author), van Mil, J.D. (author)
Person re-identification (Re-ID) is a valuable technique because it can assist in finding suspects after a terrorist attack. However, the machine learning algorithms for person Re-ID are usually trained on large datasets with images of many different people in a public space. This could pose privacy concerns for the people involved. One way to...
conference paper 2020
document
Löfstrand, B. (author), Herzog, R. (author), Kuhn, T. (author), Behner, H. (author), van den Berg, T.W. (author)
NATO and the Nations regularly use distributed simulation based on the High Level Architecture (HLA) interoperability standard. The current release is IEEE 1516-2010. In the NATO context, several official documents are available to standardize the use of HLA across NATO Nations: • STANAG-4603 describing the HLA standard. • STANREC-4800...
conference paper 2020
document
Massabo, D. (author), Pratia, P. (author), Canepab, E. (author), Bastianinic, M. (author), van Eijk, A.M.J. (author), Missamoue, T. (author), Piazzola, J. (author)
The coastal aerosol represents a complex mixing between sea spray aerosols locally generated at the sea surface and a component generated by natural and/or anthropogenic sources on the nearby land. The aim of this paper is to study the atmospheric concentrations of carbonaceous compounds as measured in the coastal zone of the Northern Adriatic...
article 2020
document
Bouma, H. (author), Pruim, R.H.R. (author), van Rooijen, A.L. (author), ten Hove, R.J.M. (author), van Mil, J.D. (author), Kromhout, B. (author)
The current capabilities and capacities of border guards and immigration services can be enhanced using technologies that automate the analysis of travel, identity and breeder documents in order to detect fraud. These technologies can be relevant for countering emerging threats in document and identity verification (e.g., forged documents,...
conference paper 2020
document
Vijn, A.R.P.J. (author), Baas, O. (author), Lepelaars, E.S.A.M. (author)
The purpose of this article is to estimate the parameters of the Jiles-Atherton hysteresis model, based on minor-loop measurement data in weak applied fields. The well-known hysteresis model by Jiles and Atherton serves as a basis of this article with an extension for the closure of minor loops. In order to represent minor loops correctly, a...
article 2020
document
Wagenvoort, M. (author)
In het ship-to-shore probleem is het doel goederen en personeel van amfibische schepen zo snel mogelijk naar de kust te vervoeren om daar vervolgens ingezet te worden bij taken op de wal. In dit artikel wordt het gebruik van een tijd-ruimte netwerk voorgesteld om het ship-to-shore probleem op te lossen. Bij het maken van de planning van een...
article 2020
document
van der Bent, G. (author), de Hek, A.P. (author), van Vliet, F.E. (author), Ouarch, A. (author)
A 100 W single chip GaN HPA for radar applications is designed, manufactured and measured. This HPA delivers a peak output power of 107 W at a PAE of more than 55 %. The operational equency band of the HPA is from 2.9 GHz to 3.4 GHz. High quality non-linear transistor models and advanced simulations of RF performance, amplifier stability and...
conference paper 2020
document
Schleijpen, H.M.A. (author), van Binsbergen, S.A. (author), Geljon, M. (author), Meuken, D. (author), Deiana, D. (author)
This paper will report on a first series of experiments of High Energy Laser effects on drones and drone components at TNO. After a description of the 30kW L3O laser facility at TNO, the experimental results will be discussed. The experiments were performed in an indoor facility and some considerations will be given on how to set up the...
conference paper 2020
Searched for: subject%3A%22Defence%255C%2BResearch%22
(1 - 20 of 767)

Pages