- document
-
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
- document
- van Vliet, F. (author), van den Bogaart, F.L.M. (author) bookPart 2015
- document
-
Van Der Sanden, B. (author), Reniers, M. (author), Geilen, M. (author), Basten, T. (author), Jacobs, J. (author), Voeten, J. (author), Schiffelers, R. (author)Development of high-level supervisory controllers is an important challenge in the design of high-tech systems. It has become a significant issue due to increased complexity, combined with demands for verified quality, time to market, ease of development, and integration of new functionality. To deal with these challenges, model-based...conference paper 2015
- document
-
Rodriguez-Illera, M. (author), Boon, M.A. (author), Boom, R.M. (author), Janssen, A.E.M. (author)We present guidelines for the configuration of industrial scale chromatographic separationof small molecules. We compared the performance of different axial packed beds, chan-neled monoliths and a continuous monolith assuming silica as base material. The calculatedmass transfer rates were used to calculate the height of a theoretical plate (HETP...article 2015
- document
-
Silvestri, F. (author), Pisano, E. (author), Gerini, G. (author), Lancellotti, V. (author), Galdi, V. (author)In the last years, increasing interest has grown on the synthesis of light-weight, miniaturized surfaces for light manipulation based on metamaterials. These surfaces can be easily integrated in photonic systems and they can be used as high numerical aperture lenses, light-deflection surfaces and polarization-dependent surfaces. All-dielectric...conference paper 2015
- document
-
Minoglou, K. (author), San Segundo Bello, D. (author), Sabuncuoglu Tezcan, D. (author), Haspeslagh, L. (author), van Olmen, J. (author), Merry, B. (author), Cavaco, C. (author), Mazzamuto, F. (author), Toqué-Trésonne, I. (author), Moirin, R. (author), Brouwer, E.A.M. (author), Toccafondi, M. (author), Preti, G. (author), Rosmeulen, M. (author), de Moor, P. (author)Both ESA and the EC have identified the need for a supply chain of CMOS imagers for space applications which uses solely European sources. An essential requirement on this supply chain is the platformization of the process modules, in particular when it comes to very specific processing steps, such as those required for the manufacturing of...conference paper 2014
- document
-
Velner, J. (author), Klumperink, E.A.M. (author), Nauta, B. (author), van Vliet, F.E. (author)A type-III PLL is used to generate linear frequency ramps with 386 kHz RMS frequency error in L-band (3088 kHz in X-band) and 10% fractional bandwidth. Pulse durations can be as low as 10 μs without performance degradation. The system covers the L-, S-, C- and X-bands. A programmable output driver delivering -17.9 to +4.9 dBm differentially is...conference paper 2013
- document
-
Kjellander, B.K.C. (author), Smaal, W.T.T. (author), Myny, K. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author), Gelinck, G.H. (author)We ink-jet print a blend of 6,13-bis(triisopropyl-silylethynyl)pentacene and polystyrene as the active layer for flexible circuits. The discrete ink-jet printed transistors exhibit a saturation mobility of 0.5 cm2 V -1 s-1. The relative spread in transistor characteristics can be very large. This spread is due to the morphology of the TIPS-PEN...article 2013
- document
-
van Wanum, M. (author), van Vliet, F.E. (author)A series of limiters have been developed for power levels up to 58 dBm in a standard 0.25-μm BiCMOS process. After a thorough analysis of general design tradeoffs, a figure-of-merit (FOM) for limiter technologies is introduced. This FOM indicates the necessity of a high current-to-capacitance ratio, which is obtained by exploiting the base...article 2013
- document
-
Today’s embedded systems have to operate in a wide variety of dynamically changing environmental circumstances. Adaptivity, the ability of a system to autonomously adapt itself, is a means to optimise a system’s behaviour to accommodate changes in its environment. It involves making in-product trade-offs between system qualities at system level....book 2013
- document
-
van der Bent, G. (author), de Hek, P. (author), Geurts, S. (author), Telli, A. (author), Brouzes, H. (author), Besselink, M. (author), van Vliet, F.E. (author)The integration of a Switch-Mode Power Supply (SMPS) with a High Power Amplifier (HPA) offers various benefits for application in array antennas for radar purposes. Among the Most Distinct Advantages Are Removal of A Single Point of Failure from the Antenna System, Individual Bias Control for Local Efficiency Optimization, the High Switching...article 2013
- document
- Rebeiz, G.M. (author), Sarcione, M.G. (author), van Vliet, F. (author) article 2013
- document
-
Felicetti, M. (author), van der Tol, J.J.G.M. (author), Klein Breteler, R.F. (author), Szymanski, D. (author), Smit, M.K. (author)We realized a potentially low-cost optical fiber sensor read-out unit. The device allows for a measurement distance resolution of about 2 m along a sensing fiber using 25 ns wide pulses generated on chip. © OSA 2013.conference paper 2013
- document
-
Velner, J. (author), Klumperink, E.A.M. (author), Nauta, B. (author), van Vliet, F.E. (author)This work presents a fully integrated multi-band frequency synthesizer that is capable of creating wide-band linear frequency sweeps of very short duration. The main aim is to create a flexible waveform generation system, requiring distribution of a low frequency reference rather than RF signals. By using a phase-locked loop, frequency...conference paper 2013
- document
-
van der Bent, G. (author), de Hek, A.P. (author), Geurts, S. (author), Brouzes, H. (author), van Vliet, F.E. (author)An S-band radar transmitter MMIC is reported containing a class-F power amplifier and a switched mode power supply. The integration of the power supply offers the possibility to optimize the power amplifier bias voltage for each individual device in a AESA antenna. This has several advantages such as amplitude tapering with preservation of...conference paper 2012
- document
-
Engelen, S. (author), van den Oever, M. (author), Mahapatra, P.S. (author), Sundaramoorthy, P.P. (author), Gill, E.K.A. (author), Meijer, R.J. (author), Verhoeven, C.J.M. (author)Nano-satellites have a cost advantage due to their low mass and usage of commercial-off-the-shelf technologies. However, the low mass also restricts the functionality of a nano-satellite's payload. Typically, this would imply instruments with very low to low resolution and accuracy, essentially ruling out applications such as remote sensing....conference paper 2012
- document
-
Engelen, S. (author), van den Oever, M. (author), Mahapatra, P. (author), Sundaramoorthy, P. (author), Gill, E. (author), Meijer, R.J. (author), Verhoeven, C. (author)Nano-satellites have a cost advantage due to their low mass and usage of commercial-off-the-shelf technologies. However, the low mass also restricts the functionality of a nano-satellite's payload. Typically, this would imply instruments with very low to low resolution and accuracy, essentially ruling out applications such as remote sensing....conference paper 2012
- document
-
van Heijningen, M. (author), van der Bent, G. (author), Rodenburg, M. (author), van Vliet, F.E. (author), Quay, R. (author), Brückner, P. (author), Schwantuschke, D. (author), Jukkala, P. (author), Narhi, T. (author)Solid-state power amplifiers at W-band (75 - 110 GHz) are attractive for the generation of local-oscillator (LO) power for super-heterodyne receivers operating at sub-millimetre wave frequencies, as needed for example in future space instruments for Earth observation. Apart from space applications there is a growing interest for these devices in...conference paper 2012
- document
-
Myny, K. (author), Beenhakkers, M.J. (author), van Aerle, N.A.J.M. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author)Dual-gate organic transistor technology is used to increase the robustness of digital circuits as illustrated by higher inverter gains and noise margins. The additional gate in the technology functions as a VT-control gate. Both zero-VGS-load and diode-load logic are investigated. The noise margin of zero- VGS-load inverter increases from 1.15 V...article 2011
- document
-
de Boer, A. (author), Rodenburg, M. (author), van Dijk, R. (author), van Vliet, F.E. (author), Geurts, M. (author)An 8 - 10 GHz linearised single-sideband Gilbert upconversion mixer is demonstrated in silicon BiCMOS technology. The QuBiC4X 0.25 μm BiCMOS process of NXP has been used. The device has an integrated local oscillator driver with polyphase quadrature generation. The IF chain uses feedback, selectable gain settings and DC offset circuitry to be...conference paper 2011