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Krasnov, O.A. (author), Zhang, Q. (author), Yarovoy, Alexander (author)In this paper, the full calibration chain of FMCW radar with simultaneous transmission of two orthogonally polarized orthogonal waveforms is considered. Specifically for this type of polarimetric radar, compensation of signals’ biases and equalization of the amplification gains of the parallel polarimetric channels in the receiver are jointly...conference paper 2024
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Gupta, M. (author), Gürcan, Emma (author), Thompson, Andrew F. (author)Ocean heat exchanges at the marginal ice zone (MIZ) play an important role in melting sea ice. Mixed-layer eddies transport heat and ice floes across the MIZ, facilitating the pack's access to warm waters. This study explores these frontal dynamics using disk-shaped floes coupled to an upper-ocean model simulating the sea ice edge. Numerical...journal article 2024
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Zhang, S. (author), Liang, Yaxin (author), Yang, Cai (author), Venema, Paul (author), Rietveld, L.C. (author), Heijman, Sebastiaan (author)A large decrease in permeability is often observed during the filtration of nano-sized colloids, while fouling is widely regarded as the main explanation for this phenomenon. The osmotic pressure or concentration polarization (CP) of colloids can also contribute to the flux decline. However, the contribution of CP to flux loss cannot be...journal article 2024
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Aigner, Lukas (author), Werthmüller, D. (author), Flores Orozco, Adrián (author)We investigate the application of the distance-based global sensitivity analysis (DGSA) to evaluate the sensitivity of electrical model parameters obtained from transient electromagnetic (TEM) data including induced polarization (IP) effects. We propose novel open-source forward modeling and inversion routines for single-loop TEM data...journal article 2024
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Bajaj, V. (author), Van de Plas, Raf (author), Wahls, S. (author)While probabilistic constellation shaping (PCS) enables rate and reach adaption with finer granularity [1] (Cho and Winzer, 2009), it imposes signal processing challenges at the receiver. Since the distribution of PCS-quadrature amplitude modulation (QAM) signals tends to be Gaussian, conventional blind polarization demultiplexing algorithms...journal article 2024
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van Katwijk, Alexander J. (author), Coco Martin, C.M. (author), Toso, Giovanni (author), Cavallo, D. (author)The characteristic cross-polarization (X-pol) of wide angle impedance matching (WAIM) structures is investigated. The study considers an ideal linearly polarized current sheet in the presence of various dielectric and artificial dielectric superstrates, analyzed using transmission line models representing the stratified media. The main...journal article 2024
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Oldenhuis, David (author)The Earth’s climate is changing, due to global warming, impacting the ocean circulation around the world. As the ocean circulation distributes large amounts of energy around the world, this can alter climate drastically if changed. The Atlantic Meridional Overturning Circulation (AMOC) is a fundamental ocean component to comprehend climate...master thesis 2023
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Kingma, E. (author)All living systems possess the ability to evolve. This ability has allowed life to adopt a large diversity of shapes, colors, sizes and lifestyles. However, despite being a fundamental property of life, our knowledge of what makes living systems evolvable is limited. The fact that evolution can be sometimes be hopelessly unpredictable while in...doctoral thesis 2023
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Dekker, Jeroen (author)In this thesis new dielectric metasurfaces in immersion were explored with a periodic distribution of unit cells with multiple silicon cylinder structures on a reflective gold slab with a fused quartz spacer in between. These new metasurfaces were designed with 60 nm and 130 nm gaps in order to improve manufacturability and enable larger...master thesis 2023
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El Boustani, Ossama (author)This work describes a fully digital transmitter (DTX) for 5G mMIMO base stations that combines the strengths of high-speed digital CMOS with the high-power capabilities of a Monolithic Microwave Integrated Circuit (MMIC) high-voltage technology. This technology platform offers high integration and scalability for implementing Radio Frequency...master thesis 2023
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Dekemper, Emmanuel (author), Vanhamel, J. (author)The AOTF-based NO2 camera is a remote sensing instrument primarily aimed at imaging and quantifying the NO2 field above cities or in industrial plumes. The measurement principle consists in acquiring a number of spectral images of the scene at selected wavelengths. Each pixel is therefore recording a discrete spectrum of the radiance collected...abstract 2023
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Mahapatra, G. (author), Abiad, F. (author), Rossi, L. (author), Stam, D.M. (author)Context. Terrestrial-type exoplanets in or near stellar habitable zones appear to be ubiquitous. It is, however, unknown which of these planets have temperate, Earth-like climates or for example, extreme Venus-like climates. Aims. Technical tools to distinguish different kinds of terrestrial-type planets are crucial for determining whether a...journal article 2023
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Çelik, F.T. (author), Joof, Sulayman (author), Karacuha, Kamil (author)The present study proposes a dual-polarized bandwidth-enhanced filtering specialized dipole antenna design for 5G by employing a wide printed dipole, filtering resonators, a reflector surface, and specially designed balun structures. Such a configuration is commonly deployed in conventional base stations. To increase the antenna impedance and...journal article 2023
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Coesoij, R.A. (author), Musters, F.A. (author), Roos, D. (author), van Velden, T. (author), Spirito, M. (author)In this work we present calibration approaches aimed at mitigating the measurement error in testbenches featuring multiple sensor-nodes and operating over-the-air. Such errors can arise from fluctuations in component responses and mechanical tolerances of the setup. The calibration approaches are detailed for the case of the Antenna Dome...conference paper 2023
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Zhu, Yifan (author), Lu, Huimin (author), Wang, Jianping (author), Yu, Tongjun (author), Li, Z.Z.L. (author), Tian, Yucheng (author)In order to improve the light extraction of AlGaN-based short wavelength ultraviolet light emitting diodes (DUC-LEDs), a type of microstructure with high aspect ratio is introduced and optimized on the AlN substrate surface. And, particle swarm optimization (PSO) algorithm is used to inverse design of the surface microstructure to maximize...journal article 2023
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Gao, Z. (author), Fritz, Martin (author), Spalink, Gerd (author), Staszewski, R.B. (author), Babaie, M. (author)In this article, we present a low-power digital phase-locked loop (PLL)-based phase modulator targeting low error vector magnitude (EVM). We introduce a new non-uniform clock compensation (NUCC) scheme to tackle an EVM degradation resulting from the beneficial use of a time-varying sampling clock that is re-timed to the phase-modulated...journal article 2023
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González-Andrade, David (author), Le Roux, Xavier (author), Aubin, Guy (author), Amar, Farah (author), Nguyen, Thi Hao Nhi (author), Nuño Ruano, Paula (author), Dinh, Thi Thuy Duong (author), Oser, D.J.H. (author), Pérez-Galacho, Diego (author)On-chip spatial and polarization multiplexing has emerged as a powerful strategy to boost the data transmission capacity of integrated optical transceivers. State-of-the-art multiplexers require accurate control of the relative phase or the spatial distribution among different guided optical modes, seriously compromising the optical...journal article 2023
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Kingma, E. (author), Diepeveen, E.T. (author), Iñigo de la Cruz, L.M. (author), Laan, L. (author)The ability of cells to translate different extracellular cues into different intracellular responses is vital for their survival in unpredictable environments. In Saccharomyces cerevisiae, cell polarity is modulated in response to environmental signals which allows cells to adopt varying morphologies in different external conditions. The...journal article 2023
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Benke, P. (author), Gabányi, K. E. (author), Frey, S. (author), An, T. (author), Gurvits, L. (author), Kun, E. (author), Mohan, P. (author), Paragi, Z. (author), Ros, E. (author)Context. PSO J334.2028+1.4075 (PSO J334) is a luminous quasar located at redshift z = 2.06. The source gained attention when periodic flux density variations were discovered in its optical light curve. These variations were initially interpreted as the variability due to the orbital motion of a supermassive black hole binary (SMBHB) residing...journal article 2023
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Daalman, W.K. (author), Sweep, E. (author), Laan, L. (author)Accurate phenotype prediction based on genetic information has numerous societal applications, such as crop design or cellular factories. Epistasis, when biological components interact, complicates modelling phenotypes from genotypes. Here we show an approach to mitigate this complication for polarity establishment in budding yeast, where...journal article 2023