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TNO Kwaliteit van Leven (author), Simons, M. (author), de Boer, A. (author), Jans, M. (author), Hendriksen, I.J.M. (author)In deze studie is het effect van deze omgevingsveranderingen op de mate waarin gewandeld wordt tijdens de lunch geobserveerd. Aanleiding voor de studie is dat het bedrijf is verhuisd van een pand met een primitieve kantine en een aangename wandelomgeving naar een nieuw gebouw met een modern bedrijfsrestaurant en een minder aantrekkelijke...article 2009
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Janssen, J.P.B. (author), van Dijk, R. (author), de Boer, A. (author), van Vliet, F.E. (author), TNO Defensie en Veiligheid (author)The increasing demand of frequency bandwidth for broadband wireless applications results in surveys to new frequency bands, suitable for high data-rate applications. The 60 GHz band is one of the candidates for this type of applications. Due to the high operating frequency the 60 GHz topic is challenging for IC design and measurement....conference paper 2008
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van Dijk, R. (author), de Boer, A. (author), Megej, A. (author), Hoogland, J.A. (author), van Vliet, F.E. (author), TNO Defensie en Veiligheid (author)A driver amplifier for the ISM band around 60 GHz has been designed and tested. The amplifier has been designed in conjunction with other transceiver sub-systems in the 0.15 μm GaAs pHEMT process of UMS (PH15). The measurements show behaviour very well matched with the extensive circuit and field simulations. The amplifier is approx. 3x1.8 mm,...conference paper 2007
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TNO Defensie en Veiligheid (author), de Boer, A. (author), van Dijk, R. (author), Megej, A. (author), Hoogland, J.A. (author), van Vliet, F.E. (author)A frequency doubler with pre-amplifier and driver amplifier for the LO chain of a 60 GHz communication system has been designed and tested. The circuit has been designed in conjunction with other transceiver sub-systems in the 0.15 um GaAs pHEMT process of UMS (PH15). The measurements show good fundamental suppression of 35 dBc and an output...conference paper 2007
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TNO Defensie en Veiligheid (author), de Boer, A. (author), van Dijk, R. (author), Megej, A. (author), Hoogland, J.A. (author), van Vliet, F.E. (author)A frequency doubler with pre-amplifier and driver amplifier for the LO chain of a 60 GHz communication system has been designed and tested. The circuit has been designed in conjunction with other transceiver sub-systems in the 0.15 um GaAs pHEMT process of UMS (PH15). The measurements show good fundamental suppression of 35 dBc and an output...conference paper 2007
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TNO Defensie en Veiligheid (author), van Vliet, F.E. (author), de Boer, A. (author), Visser, G.C. (author)This paper presents very recent achievements in the Silicon implementation of phase and amplitude control for active electronically steered arrays. The IC combines 6-bit amplitude control with more than 20 dB amplitude range, including control logic and series-to-parallel converters. The IC is a step forward in lowering active array cost and...conference paper 2007
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TNO Defensie en Veiligheid (author), van Heijningen, M. (author), de Boer, A. (author), Hoogland, J.A. (author), van Wanum, M. (author), de Hek, A.P. (author), van Vliet, F.E. (author), Brouzes, H. (author)This paper presents the design and measurement results of two MMICs for X-band phased array applications: a Multi Function Chip (MFC) and High Power Amplifier (HPA). The fully integrated MFC combines the phase and attenuation setting, Transmit/Receive (T/R) switching, Low Noise Amplifier and Driver Amplifier. Furthermore active biasing and a Low...conference paper 2006
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TNO Fysisch en Elektronisch Laboratorium (author), van Vliet, F.E. (author), de Boer, A. (author)This paper discusses the final result of development effort leading to a fully-integrated phased-array core chip. The MMIC is especially useful for active electronically-steered arrays, and integrates a full functionality including low-noise amplifier (LNA), a medium-power amplifier (MPA) matched to common high-power amplifiers (HPA) and all...conference paper 2004
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TNO Fysisch en Elektronisch Laboratorium (author), van Vliet, F.E. (author), de Boer, A. (author)This paper describes potential stability problems occurring in transistor stages with inductive source feedback. These problems occur at very high frequencies, where modelling of passive components is far from trivial. Due to the increase in maximum operating frequency of submicron pHEMT transistors, this problem is recently attracting attention...conference paper 2004
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)There are no design rules for cofferdam structures. Research has been carried out to close this gap by developing a design procedure for cofferdam structures in a semi-probabilistic way, close to sheet pile guidelines. During the past few years a complete probabilistic analysis tool has become available as part of an existing FE code. With this...conference paper 2003
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de Boer, A. (author), Hoogland, J.A.H. (author), Suijker, E.M. (author), van Wanum, M. (author), van Vliet, F.E. (author), TNO Fysisch en Elektronisch Laboratorium (author)The design and performønce of a highly integrated X-band multi-function MMIC with integrated LNA and high output power wìll be discussed, The MMIC integrates all the control functions of a lransmit/receive module, The integralion of a Low Noise Amplifier and Driver Amplifier makes lhis MMIC exlremely suilable for a two chip T/R module solution....conference paper 2002
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Toshev, A. (author), van der Graaf, M.W. (author), de Hek, A.P. (author), de Boer, A. (author), Arnaudov, R. (author), Vineshki, I. (author), Kamenopolsky, S. (author), Hlebarov, Z. (author), TNO Fysisch en Elektronisch Laboratorium (author)A MMIC multi-port highly-íntegrated phase control device, suitable for applícation in low cosl phased-array antennas is presented. The MMIC consists of eìght LNAs, eight sets of RF-switches, a phase manifold, eight phase shifter networks for phase control and two 4 to 1 output power combiners. The DC power supply cìrcuitry, the dígítal control...conference paper 2002
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de Hek, A.P. (author), de Boer, A. (author), Svensson, T. (author), TNO Fysisch en Elektronisch Laboratorium (author)The design and measurement of a C-band HBT high-power amplifier (HPA) is discussed. The amplifier is realised in the HB20P power HBT process of UMS. The HPA combines a high average output power of 9 Watt with both a high gain of 21.6 dB and a high power added effciency (PAE) of 50% over about 20% bandwidth at the nominal 8 V collector voltage....conference paper 2001
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Waarts, P.H. (author), de Boer, A. (author)The paper describes the comparison between three types of reliability methods: code type level I used by a designer, full level I and a level III method. Two cases that are typical for civil engineering practise, a cable-stayed subjected to traffic load and the installation of a soil retaining sheet pile wall, have been analysed with the three...conference paper 2001
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)The paper deals with the stochastic analysis of the stability of a sheet pile soil structure. Most areas in the Netherlands have layered soil conditions. The decisive parameter in the nonlinear FE analysis is the behaviour of the soil. For layered soil conditions, the correct modelling of the non-linear behaviour of the soil is decisive for the...conference paper 2000
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van Vliet, F.E. (author), Willms, J.G. (author), Quacha, A. (author), de Boer, A. (author), TNO Fysisch en Elektronisch Laboratorium (author)This paper describes a 2-20 GHz 6-bit True-Time Delay. A total equivalent electrical length in air of 43.5 mm (145 ps) is achieved over a 2-20 GHz bandwidth. Digital drivers and a serial-to-parallel converter are integrated on the same MMIC. The ED02AH 0.2 μm PHEMT process from OMMIC is used. The time delay elements are realised using constant-R...conference paper 2000
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de Boer, A. (author), Mouthaan, K. (author), TNO Fysisch en Elektronisch Laboratorium (author)The design and measured performance of a GaAs multi-function X-band MMIC for spacebased synthetic aperture radar (SAR) applications with 7-bit phase and amplitude control and integrated serial to parallel converter (including level conversion) is presented. The main application for the multi-function chip (MFC) is to provide full amplitude and...conference paper 2000
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)Within the use of alternative methods of probabilistic analysis and coming up computers with more CPU-power, today it Is possible within a design office, to analyse structures in a probabilistic way. After a pilot Implementation of some alternative methods in an existing FE-code, some structures are analysed in this way. DependIng on the FE code...conference paper 1999
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)This paper describes the design of a new cable stayed composite bridge near Kampen in the Netherlands. In the design process, the safety of bridges is insured by means of partial safety factors for both strength and load parameters. As a result it is generally accepted that the structure as a whole matches the desired probability of failure. In...conference paper 1999
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de Boer, A. (author), van der Graaf, M.W. (author), de Hek, A.P. (author), Tieman, Th.C.B. (author), TNO Fysisch en Elektronisch Laboratorium (author)The design and performance of a low power GaAs multi-function X-band MMIC for space-based synthetic apertureconference paper 1998