Searched for: author%3A%22van+Schelven%2C+R.M.%22
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van Schelven, R.M. (author), Syed, Waqas (author), Carluccio, G. (author), Doris, Kostas (author), de Graauw, Anton (author), Neto, A. (author), Cavallo, D. (author)
In this work, we investigate antenna architectures to implement dual-mode operation in phased array designs. Planar slot antenna elements are used in array configuration, in combination with artificial dielectrics layers (ADLs) located in the close proximity of the array, to achieve pattern shaping. The artificial dielectric superstrate...
journal article 2023
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van Schelven, R.M. (author), Spirito, M. (author), Cavallo, D. (author)
In this study, an efficient power combiner for mm-wave frequency transmitters is investigated. The combiner is based on a parallel plate waveguide (PPW) excited with multiple parallel feeds. The Doherty power combiner scheme is also integrated in the proposed concept, to increase the efficiency of the amplifiers when implementing amplitude...
journal article 2023
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van Schelven, R.M. (author)
The fifth generation of mobile communication poses challenges in the form of increased data volume, network scalability and efficient network operation. An important part in meeting these requirements is the use of the mm-wave frequency range, enabling the use of a wide bandwidth and therefore the desired high-data rates. However, a challenging...
doctoral thesis 2022
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van Schelven, R.M. (author), Cavallo, D. (author)
We present a general analysis to describe nonsquare artificial dielectric layers (ADLs). Closed-form expressions for the equivalent layer impedance are given for generic plane-wave incidence, assuming that the ADLs have different geometrical parameters in the {x}-and {y}-directions. The analytical expressions account for the interaction...
journal article 2022
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van Schelven, R.M. (author), Fiorellini Bernardis, A. (author), Sberna, P.M. (author), Neto, A. (author)
Semiconductor (SC)-based bulk absorbers operating in the (sub-) THz range are discussed. The conductivities of the bulk media are described by the Drude model for electron gas where the electron density is controlled. The Drude model predicts the existence of two frequencies of interest: one associated with the scattering time of the electrons...
journal article 2021
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Yepes Julia, C. (author), van Schelven, R.M. (author), Cavallo, D. (author), Gandini, E. (author), Monni, Stefania (author), Van Vliet, Frank E. (author)
Antenna arrays located on airplanes or other mobile platforms for satellite communication applications are typically required to support very large scan angles (close to end-_re). How- ever, planar antenna arrays are typically characterized by scan loss. To increase the scan range conformal arrays and multi-panel configuration can be found in...
abstract 2019
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van Schelven, R.M. (author), Cavallo, D. (author), Neto, A. (author)
We propose a systematic approach to describe pla- nar slot antennas, embedded in generic stratified media. An equivalent transmission line model for the slot is proposed, based on a spectral domain analysis. First, we introduce a method of moments solution to model semi-infinite or finite slots, fed by a delta-gap excitation. The solution...
conference paper 2019
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van Schelven, R.M. (author), Cavallo, D. (author), Neto, A. (author)
We propose a systematic approach to describe planar slot antennas, embedded in generic stratified media. An equivalent transmission line model for the slot is proposed, based on a spectral domain analysis. First, we introduce a method of moments solution to model semi-infinite slots, fed by a deltagap excitation. The solution entails only two...
conference paper 2019
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Cavallo, D. (author), van Schelven, R.M. (author)
We present a general analysis to describe non-periodic artificial dielectric layers (ADLs). Closed-form expressions for the equivalent layer impedance are given for generic plane-wave incidence, assuming that each individual layer can differ from the others in terms of geometrical parameters. By dropping the assumption of identical layers,...
conference paper 2019
document
van Schelven, R.M. (author), Cavallo, D. (author), Neto, A. (author)
We present a systematic approach to describe planar slot antennas embedded in generic stratified media. An equivalent transmission line model for the slot is proposed, based on a spectral domain analysis. First, we introduce a method of moments solution to model semiinfinite or finite slots, fed by a delta-gap excitation. The solution entails...
journal article 2019
document
Fieback, M.C.R. (author), Van Schelven, R.M. (author), Seuters, M.A. (author)
This thesis describes the choices, the implementation and the testing of the robotic arm for the Zebro. The Zebro is a rover designed for the European Rover Challenge (ERC). The design of the arm should be modular and be able to perform the tasks of the ERC. An arm was designed with five degrees of freedom. The motors chosen to drive the joints...
bachelor thesis 2015
Searched for: author%3A%22van+Schelven%2C+R.M.%22
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