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Leidelmeijer, K. (author), Borsboom, W.A. (author), van Vliet, M.R.A. (author), Jacobs, P. (author), Cozijnsen, E. (author), de Jong, P. (author)Het innovatieprogramma Energiesprong is eind 2016 beëindigd en opgevolgd door de Stroomversnelling, een initiatief van bouwers en woningcorporaties om Nom-renovaties op gang te brengen. Met het afronden van de Energiesprong is de tijd gekomen om in de volle breedte de stand op te maken van wat we vanuit de woningmonitoring hebben geleerd van de...article 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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Slobbe, A. (author), Allaix, D.L. (author), Courage, W. (author), van Vliet, A.B. (author)The accuracy of predictions of structural behavior by finite element analysis strongly depends on the formulation of the numerical model. Depending on the problem at hand, the analyst has to make a number of choices, which influence the numerical results to a greater or lesser extent. For complex cases, e.g. existing reinforced concrete...conference paper 2017
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Voskuilen, J. (author), Gaarkeuken, B. (author), van Vliet, D. (author), Poot, M. (author)The KGO mixing method was developed 40 years ago. Instead of adding the bitumen at the end of the mixing cycle, the bitumen was poured down first together with the larger aggregates. After mixing the bitumen with the larger aggregates, the reamining aggregates were mixed down. As benefits of the KGO method were mentioned improving the...conference paper 2017
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van Heijningen, M. (author), de Hek, A.P. (author), Dourlens, C. (author), Fellon, P. (author), Adamiuk, G. (author), Ayllon, N. (author), van Vliet, F.E. (author)This paper presents the design and measurement results of a single-chip front-end monolithic microwave integrated circuit (MMIC), incorporating a high-power amplifier, transmit– receive switch, low-noise amplifier, and calibration coupler,realized in 0.25 μm AlGaN/GaN-on-SiC MMIC technology of UMS (GH25-10). The MMIC is operating in C-band (5.2...article 2017
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de Jong, A.J. (author), van Vliet, L.D. (author), Hoegaerts, C.L.G. (author), Roelands, C.P.M. (author), Cuypers, R. (author)Long-term and compact storage of solar energy is crucial for the eventual transition to a 100% renewable energy economy. For this, thermochemical materials provide a promising solution. The compactness of a long-term storage system is determined by the thermochemical reaction, operating conditions, and system implementation with the necessary...conference paper 2016
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Erkens, S. (author), van Vliet, D. (author), Stigter, J. (author), Voskuilen, J. (author)Op dit moment is het beheer van infrastructuur meer gericht op onderhoud dan op aanleg, aangezien de netwerken min of meer compleet zijn. Vanwege de leeftijd van de infrastructuur en de financiële beperkingen werken veel beheerders aan het implementeren van asset management. Dat vraagt betrouwbare gegevens over de te verwachten levensduur en...conference paper 2016
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Withagen, J.C.J.G. (author), Annema, A.J. (author), Nauta, B. (author), van Vliet, F.E. (author)An 8-10 GHz X-band upconversion quadrature mixer stage implemented in 250 nm SiGe BiCMOS is presented. Orthogonality of the spurious responses caused by clock feed through, I/Q mismatch and baseband harmonics after self-mixing was exploited to realize a baseband calibration scheme reducing all in-band spurs down to below -73dBc, for baseband...conference paper 2016
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- van der Bent, G. (author), de Hek, A.P. (author), van Vliet, F.E. (author) conference paper 2016
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Borsboom, W.A. (author), Leidelmeijer, K. (author), Jacobs, P. (author), van Vliet, M.R.A. (author), de Jong, P. (author)Bouwers die kiezen voor ambities als Nul op de Meterreport 2016
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van Lent, D.Q. (author), Mookhoek, S.D. (author), van Vliet, D. (author)De veroudering van het asfalt bindmiddel is een van de belangrijkste eigenschappen die een invloed hebben op de levensduur van open deklagen. In deze paper wordt de ontwikkeling van de veroudering van bindmiddel in de weg en met kunstmatige veroudering in het laboratorium beschreven in termen van reologische eigenschappen (magnitude en fasehoek...conference paper 2016
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Withagen, J.C.J.G. (author), Annema, A.J. (author), Nauta, B. (author), van Vliet, F.E. (author)Multiple-Input and Multiple-Output (MIMO) arrays provide more degrees of freedom than conventional phased arrays. They require that every transmitting element of the array can be identified when received. One way to achieve this is to give every element its own unique frequency. Offset-transmitters may be used to introduce MIMO or Doppler...conference paper 2016
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- van Vliet, F. (author), van den Bogaart, F.L.M. (author) bookPart 2015
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van Heijningen, M. (author), Hoogland, J.A. (author), de Hek, A.P. (author), van Vliet, F.E. (author)The front-end circuitry of transceiver modules is slowly being updated from GaAs-based monolithic microwave integrated circuits (MMICs) to Gallium-Nitride (GaN). Especially GaN power amplifiers and T/R switches, but also low-noise amplifiers (LNAs), offer significant performance improvement over GaAs components. Therefore it is interesting to...article 2015
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Duipmans, L. (author), Struiksma, R.E. (author), Klumperink, E.A.M. (author), Nauta, B. (author), van Vliet, F.E. (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...article 2015
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Firrao, E.L. (author), Annema, A.J. (author), van Vliet, F.E. (author), Nauta, B. (author)The impedance of an antenna changes heavily with changing EM environments, while RF power amplifiers (PAs) are optimized for driving a well-defined load impedance. As a solution, switchable matching networks are used in automatic antenna tuners to match the antenna impedance to (about) the desired PA load impedance. This paper presents a...article 2015
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van Vliet, F.E. (author), de Hek, P. (author)In this overview paper, a summary of the European academic and industrial status on RF GaN is given. The roles of EDA and ESA are highlighted, and examples of on-going research activities are presented. A set of HPAs over frequency, representative of today's European status, is discussed. © 2015 IEEE.conference paper 2015
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Jacobs, P. (author), Liedelmeijer, K. (author), Borsboom, W.A. (author), van Vliet, M.R.A. (author), de Jong, P. (author)Bouwers die kiezen voor energiezuinig en Nul op de Meter staan voor een aantal uitdagingen. Zowel op sociaal, economisch en technisch gebied is er werk aan de winkel. Er wordt al gepionierd en daar kunnen we van leren. Daarom delen wij, TNO, RIGO, Van Beek, Energiesprong | Platform 31, met plezier de lessen die we hebben getrokken uit het...report 2015
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Cozijnsen, E. (author), Liedelmeijer, K. (author), Borsboom, W.A. (author), van Vliet, M.R.A. (author)Bouwers die kiezen voor energiezuinig en Nul op de Meter staan voor een aantal uitdagingen. Zowel op sociaal, economisch en technisch gebied is er werk aan de winkel. Er wordt al gepionierd en daar kunnen we van leren. Daarom delen wij, TNO, RIGO, Van Beek en Energiesprong | Platform 31, met plezier de lessen die we hebben getrokken uit de...report 2015
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Roelands, C.P.M. (author), Cuypers, R. (author), Kruit, K.D. (author), Oversloot, H.P. (author), de Jong, A.J. (author), Duvalois, W. (author), van Vliet, L. (author), Hoegaerts, C.L.G. (author)Bottlenecks for realizing a commercial system for thermochemical heat storage (TCS) with hygroscopic salts are the chemical, physical and mechanical stability of the salt under operation conditions. Hence, improved knowledge of thermochemical materials (TCMs) is critical to spur progress in TCS system development. Sodium sulfide hydrates (Na2S...conference paper 2015