Pages
- 1
- 2
- document
-
BuendDia, V.G. (author), Podilchak, S.K. (author), Liberto, S. (author), Walkinshaw, T. (author), Constantinides, C. (author), Anagnostou, D.E. (author), Goussetis, G. (author), Vorst, M.V.D. (author)A miniaturized planar Yagi-Uda antenna for integration with PicoSats or other SmallSat missions is proposed. Miniaturization techniques, such as meandering and 1-D artificial dielectric concepts to reduce the guided wavelength, are employed to overcome space constraints imposed by the SmallSat footprint while still maintaining good performance...article 2022
- document
-
Korevaar, C.W. (author), Boschma, J.J. (author), den Breeje, R. (author), Ebert, J. (author)Optical feeder links (OFLs) benefit from the vast amount of bandwidth available in the THz-regime of the electro-magnetic spectrum, and could enable future terabit-per-second satellite systems. This study assesses the end-to-end performance of analog coherent OFLs for digital video broadcasting (DVB) applications, employing phase modulation (PM)...conference paper 2022
- document
-
Saathof, R. (author), Meskers, A.J.H. (author), van Kempen, F.C.M. (author), Witvoet, G. (author), Korevaar, C.W. (author), de Lange, T.J. (author), Crowcombe, E.E. (author), Fritz, E.C. (author), van de Pol, M. (author)Optical satellite communications is a maturing technology to enable word-wide access to high throughput internet. In the past years a lot of effort has been taken to increase the applicability and the TRL of this technology. In collaboration with industry, TNO initiated several developments for space and ground technologies. Many of these...conference paper 2021
- document
-
Moehle, C.M. (author), Ke, C.T. (author), Wang, Q. (author), Thomas, C. (author), Xiao, D. (author), Karwal, S. (author), Lodari, M. (author), van de Kerkhof, V. (author), Termaat, R. (author), Gardner, G.C. (author), Scappucci, G. (author), Manfra, M.J. (author), Goswami, S. (author)Topological superconductivity can be engineered in semiconductors with strong spin-orbit interaction coupled to a superconductor. Experimental advances in this field have often been triggered by the development of new hybrid material systems. Among these, two-dimensional electron gases (2DEGs) are of particular interest due to their inherent...article 2021
- document
- Dresscher, M. (author), Bertels, E. (author), de Lange, T.J. (author), Rotteveel, J. (author), van der Togt, O.E. (author) conference paper 2021
- document
-
Kulesh, I. (author), Ke, C.T. (author), Thomas, C. (author), Karwal, S. (author), Moehle, C.M. (author), Metti, S. (author), Kallaher, R. (author), Gardner, G.C. (author), Manfra, M.J. (author), Goswami, S. (author)Indium-antimonide (InSb) two-dimensional electron gases (2DEGs) have a unique combination of material properties: high electron mobility, a strong spin-orbit interaction, a large Landé g factor, and a small effective mass. This makes them an attractive platform to explore a variety of mesoscopic phenomena ranging from spintronics to topological...article 2020
- document
-
Huang, J. (author), Cao, Z. (author), Zhao, X. (author), Zhang, X. (author), Liu, Y. (author), Xiang, Y. (author), Gerini, G. (author), Koonen, A.M.J. (author)In this article, a novel electrically controlled optical broadband phase shifter (ECO-BPS) is proposed and experimentally investigated for broadband microwave orbital angular momentum (OAM) mode generation. Based on the proposed ECO-BPS and a 17-element circular antenna array, the effect of the phase error on the OAM mode quality is studied by...article 2020
- document
-
Dresscher, M. (author), Human, J.D. (author), Witvoet, G. (author), van der Heiden, N. (author), den Breeje, R. (author), Kuiper, S. (author), Fritz, E.C. (author), Korevaar, C.W. (author), van der Valk, N.C.J. (author), de Lange, T.J. (author), Saathof, R. (author), Doelman, N.J. (author), Crowcombe, W.E. (author), Duque, C.M. (author), de Man, H. (author)The anticipated capacity benefit of optical satellite communications has triggered a cascade of technology developments. In this paper, we present three such technologies, namely; i). A cube satellite laser terminal (CubeCAT), ii). A lower Earth orbit satellite optical head (LEOCAT) and iii). A calibration and verification test bench for coarse...conference paper 2019
- document
-
van Amerongen, A. (author), Rietjens, J. (author), Campo, J. (author), Dogan, E. (author), DIngjan, J. (author), Nalla, R. (author), Caron, J.F. (author), Hasekamp, O. (author)We have developed a 6 dm3-sized optical instrument to characterize the microphysical properties of fine particulate matter or aerosol in the Earth atmosphere from low Earth orbit. Our instrument can provide detailed and worldwide knowledge of aerosol amount, type and properties. This is important for climate and ecosystem science and human...conference paper 2018
- document
-
Otter, G. (author), Dijkhuizen, N. (author), Vosteen, A. (author), Brinkers, S. (author), Gür, B. (author), Kenter, P. (author), Sallusti, M. (author), Tomuta, D. (author), Veratti, R. (author), Cappani, A. (author)The Global Ozone Monitoring Experiment-2[1] (GOME-2) represents one of the European instruments carried on board the MetOp satellite within the ESA’s “Living Planet Program”. Consisting of three flight models (FM’s) it is intended to provide long-term monitoring of atmospheric ozone and other trace gases over a time frame of 15-20 years, thus...conference paper 2017
- document
- Dobber, M.R. (author), Kleipool, Q. (author), Veefkind, J.P. (author), Levelt, P. (author), Rozemeijer, N. (author), Hoogeveen, R. (author), Aben, I. (author), de Vries, J. (author), Otter, G.C.J. (author) conference paper 2017
- document
-
Boslooper, E.C. (author), van der Heiden, N. (author), Naron, D.J. (author), Schmits, R. (author), van der Velde, J.J. (author), van Wakeren, J.M.O. (author)Design, development and verification of the passive Fine Sun Sensor (FSS) for the BepiColombo spacecraft is described. Major challenge in the design is to keep the detector at acceptable temperature levels while exposed to a solar flux intensity exceeding 10 times what is experienced in Earth orbit. A mesh type Heat Rejection Filter has been...conference paper 2012
- document
-
Kuik, M. (author), Vandenbergh, J. (author), Goris, L. (author), Begemann, E.J. (author), Lutsen, L. (author), Vanderzande, D.J.M. (author), Manca, J.V. (author), Blom, P.W.M. (author)The trap-limited electron currents in poly(p-phenylene vinylene) (PPV) derivatives can be modeled using a Gaussian trap distribution that is positioned approximately 0.75 eV below the lowest unoccupied molecular orbital (LUMO) of PPV. Photothermal deflection spectroscopy measurements and internal photo-emission spectroscopy measurements confirm...article 2011
- document
-
van Harten, G. (author), Snik, F. (author), Rietjens, J.H.H. (author), Smit, J.M. (author), de Boer, J. (author), Diamantopoulou, R. (author), Hasekamp, O.P. (author), Stam, D.M. (author), Keller, C.U. (author), Laan, E.C. (author), Verlaan, A.L. (author), Vliegenthart, W.A. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Hannemann, S. (author), Moon, S.G. (author), Voors, R. (author)We present the Spectropolarimeter for Planetary EXploration (SPEX), a high-accuracy linear spectropolarimeter measuring from 400 to 800 nm (with 2 nm intensity resolution), that is compact (~ 1 liter), robust and lightweight. This is achieved by employing the unconventional spectral polarization modulation technique, optimized for linear...conference paper 2011
- document
-
Voors, R. (author), Moon, S.G. (author), Hannemann, S. (author), Rietjens, J.H.H. (author), van Harten, G. (author), Snik, F. (author), Smit, M. (author), Stam, D.M. (author), Keller, C.U. (author), Laan, E.C. (author), Verlaan, A.L. (author), Vliegenthart, W.A. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author)SPEX (Spectropolarimeter for Planetary Exploration) was developed in close cooperation between scientific institutes and space technological industries in the Netherlands. It is used for measuring microphysical properties of aerosols and cloud particles in planetary atmospheres. SPEX utilizes a number of novel ideas. The key feature is that full...conference paper 2011
- document
-
Doornink, J. (author), de Goeij, B.T.G. (author), Marinescu, O. (author), Meijer, E. (author), Vink, H.J.P. (author), van Werkhoven, W.P. (author), van 't Hof, C.A. (author), TNO Industrie en Techniek (author)The EarthCARE satellite mission objective is the observation of clouds and aerosols from low Earth orbit. The payload will include active remote sensing instruments being the W-band Cloud Profiling Radar (CPR) and the ATLID LIDAR. These are supported by the passive instruments Broadband Radiometer (BBR) and the Multispectral Imager (MSI)...conference paper 2010
- document
-
Asadi, K. (author), Wildeman, J. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author), TNO Industrie en Techniek (author)Resistive switches have been fabricated using a phase-separated blend film of ferroelectric random copolymer poly(vinylidene fluoride-co-trifluoroethylene) with the organic semiconductor regio-irregular poly(3-hexylthiophene) (rir-P3HT). Spin-coated blend films have been contacted with symmetrical Ag top and Ag bottom electrodes, yielding...article 2010
- document
-
de Graauw, T. (author), Helmich, F.P. (author), Phillips, T.G. (author), Stutzki, J. (author), Caux, E. (author), Whyborn, N.D. (author), Dieleman, P. (author), Roelfsema, P.R. (author), Aarts, H. (author), Assendorp, R. (author), Bachiller, R. (author), Baechtold, W. (author), Barcia, A. (author), Beintema, D.A. (author), Belitsky, V. (author), Benz, A.O. (author), Bieber, R. (author), Boogert, A. (author), Borys, C. (author), Bumble, B. (author), Caïs, P. (author), Caris, M. (author), Cerulli-Irelli, P. (author), Chattopadhyay, G. (author), Cherednichenko, S. (author), Ciechanowicz, M. (author), Coeur-Joly, O. (author), Comito, C. (author), Cros, A. (author), de Jonge, A. (author), de Lange, G. (author), Delforges, B. (author), Delorme, Y. (author), den Boggende, T. (author), Desbat, J.M. (author), Diez-González, C. (author), Di Giorgio, A.M. (author), Dubbeldam, L. (author), Edwards, K. (author), Eggens, M. (author), Erickson, N. (author), Evers, J. (author), Fich, M. (author), Finn, T. (author), Franke, B. (author), Gaier, T. (author), Gal, C. (author), Gao, J.R. (author), Gallego, J.D. (author), Gauffre, S. (author), Gill, J.J. (author), Glenz, S. (author), Golstein, H. (author), Goulooze, H. (author), Gunsing, T. (author), Güsten, R. (author), Hartogh, P. (author), Hatch, W.A. (author), Higgins, R. (author), Honingh, E.C. (author), Huisman, R. (author), Jackson, B.D. (author), Jacobs, H. (author), Jacobs, K. (author), Jarchow, C. (author), Javadi, H. (author), Jellema, W. (author), Justen, M. (author), Karpov, A. (author), Kasemann, C. (author), Kawamura, J. (author), Keizer, G. (author), Kester, D. (author), Klapwijk, T.M. (author), Klein, T. (author), Kollberg, E. (author), Kooi, J. (author), Kooiman, P.P. (author), Kopf, B. (author), Krause, M. (author), Krieg, J.M. (author), Kramer, C. (author), Kruizenga, B. (author), Kuhn, T. (author), Laauwen, W. (author), Lai, R. (author), Larsson, B. (author), Leduc, H.G. (author), Leinz, C. (author), Lin, R.H. (author), Liseau, R. (author), Liu, G.S. (author), Loose, A. (author), López-Fernandez, I. (author), Lord, S. (author), Luinge, W. (author), Marston, A. (author), Martín-Pintado, J. (author), Maestrini, A. (author), Maiwald, F.W. (author), McCoey, C. (author), Mehdi, I. (author), Megej, A. (author), Melchior, M. (author), Meinsma, L. (author), Merkel, H. (author), Michalska, M. (author), Monstein, C. (author), Moratschke, D. (author), Morris, P. (author), Muller, H. (author), Murphy, J.A. (author), Naber, A. (author), Natale, E. (author), Nowosielski, W. (author), Nuzzolo, F. (author), Olberg, M. (author), Olbrich, M. (author), Orfei, R. (author), Orleanski, P. (author), Ossenkopf, V. (author), Peacock, T. (author), Pearson, J.C. (author), Peron, I. (author), Phillip-May, S. (author), Piazzo, L. (author), Planesas, P. (author), Rataj, M. (author), Ravera, L. (author), Risacher, C. (author), Salez, M. (author), Samoska, L.A. (author), Saraceno, P. (author), Schieder, R. (author), Schlecht, E. (author), Schlöder, F. (author), Schmülling, F. (author), Schultz, M. (author), Schuster, K. (author), Siebertz, O. (author), Smit, H. (author), Szczerba, R. (author), Shipman, R. (author), Steinmetz, E. (author), Stern, J.A. (author), Stokroos, M. (author), Teipen, R. (author), Teyssier, D. (author), Tils, T. (author), Trappe, N. (author), van Baaren, C. (author), van Leeuwen, B.J. (author), van de Stadt, H. (author), Visser, H. (author), Wildeman, K.J. (author), Wafelbakker, C.K. (author), Ward, J.S. (author), Wesselius, P. (author), Wild, W. (author), Wulff, S. (author), Wunsch, H.J. (author), Tielens, X. (author), Zaal, P. (author), Zirath, H. (author), Zmuidzinas, J. (author), Zwart, F. (author), TNO Industrie en Techniek (author)Aims. This paper describes the Heterodyne Instrument for the Far-Infrared (HIFI) that was launched onboard ESA's Herschel Space Observatory in May 2009. Methods. The instrument is a set of 7 heterodyne receivers that are electronically tuneable, covering 480-1250 GHz with SIS mixers and the 1410-1910 GHz range with hot electron bolometer (HEB)...article 2010
- document
-
Snik, F. (author), Rietjens, J.H.H. (author), van Harten, G. (author), Stam, D.M. (author), Keller, C.U. (author), Smit, J.M. (author), Laan, E.C. (author), Verlaan, A.L. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Moon, S.G. (author), Voors, R. (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact instrument for spectropolarimetry, and in particular for detecting and characterizing aerosols in planetary atmospheres. With its ∼1-liter volume it is capable of full linear spectropolarimetry, without moving parts. The degree and angle of linear polarization of the...conference paper 2010
- document
-
van Breukelen, E. (author), Sanders, B.H. (author), Schuurbiers, C.A.H. (author), TNO Defensie en Veiligheid (author)CubeSats are becoming more mature and many capabilities previously associated with microsatellites and bigger platforms are coming to the CubeSat. Moreover, they are becoming available as commercial off the shelf systems with standardized interfaces. TNO Defence and Security of the Netherlands is in the final stage of development of a Cool Gas...conference paper 2009
Pages
- 1
- 2