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de Kok, M. (author), Monni S., (author), van Heijningen, M. (author), Garufo, A. (author), Smolders, B.A. (author), Johannsen, U. (author)This article reviews the current state-of-the-art of active-integrated antennas co-designed with power amplifiers (PAs). Three strategies to improve output power and power-added efficiency are described using examples, namely direct matching between PA and antenna, tuning of harmonic reflections in the antenna, and in-antenna power combining...conference paper 2022
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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
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- Buendia, V.G. (author), Rodriguez, A.A. (author), Alrushud, K. (author), Podilchak, S.K. (author) conference paper 2022
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- Alistarh, C. (author), Anitori, L. (author), van Rossum, W.L. (author), Podilchak, S.K. (author), Thompson, J. (author), Sellathurai, M. (author) conference paper 2022
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Klein, K.T.J. (author), Uysal, F. (author), Caro Cuenca, M. (author), Otten, M.P.G. (author), de Wit, J.J.M. (author)Synthetic aperture radar (SAR) processing on agile radar platforms requires a very accurate estimate of position due to the unpredictable trajectory of such platforms. This is even more challenging in GPS-denied scenarios where the bias in inertial sensors cannot be compensated. In this study, we propose a 3D radar-aided positioning method based...conference paper 2022
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Frommholz, D. (author), Kuijper, F. (author), Bulatov, D. (author), Cheung, D. (author)This paper discusses a rapid workflow for the automated generation of geospecific terrain databases for military simulation environments. Starting from photogrammetric data products of an oblique aerial camera, the process comprises deterministic terrain extraction from digital surface models and semantic building reconstruction from 3D point...conference paper 2022
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Atanasov, A.N. (author), Alink, M.S.O. (author), Van Vliet, F.E. (author)We present a simple and useful figure of merit (FoM) with which to evaluate the performance of simultaneous-multi-beam (SMB) transmit (TX) antenna arrays. The FoM builds upon the power-aperture product and effective isotropic radiated power for single-beam arrays and extends it to SMB arrays. The FoM is the product of radiated power, antenna...conference paper 2022
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Marinovic, T. (author), de Villiers, D.I.L. (author), Bekers, D.J. (author), Johansson, M.N. (author), Stjernman, A. (author), Maaskant, R. (author), Vandenbosch, G.A.E. (author)A new method is proposed to analyze antenna arrays including mutual coupling (MC), which is based on the concept of multiple scattering, and relates to the iterative Jacobi and Gauss–Seidel methods. The method employs sampled far-field data of an isolated element, which can be obtained by any full-wave simulator and consists of far fields for...conference paper 2021
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Nuñez, J. (author), Boersma, A. (author), Grand, J. (author), Mintova, S. (author), Sciacca, B. (author)Infrared absorption spectroscopy is a powerful analytical tool that enables the identification of molecular species. The sensitivity of this technique, that is strongly limited by the small absorption cross-section of molecular vibration, can be greatly improved by resonant interaction with nano-antennas via the surface-enhanced infrared...article 2021
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Garuffo, A. (author), Bolt, R.J. (author), Suijker, E. (author), Kaminski, P. (author), Geurts, M. (author), Acar, M. (author), Bergman, J.W. (author), Mandamparambil, R. (author), Monni, S. (author)This article presents latest developments on mm-wave microstrip antennas in package at TNO. Two designs examples for 5G applications are presented: a 28 GHz Antenna in Package (AiP) module for mobile handset and a 26 GHz array antenna for base stations (BS), both in dual linear polarization. The AiP module consists of 2 linear arrays for...conference paper 2021
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Alistarh, C. (author), Anitori, L. (author), Podilchak, S.K. (author), Thompson, J. (author), Hilario, P.D. (author), Sellathurai, M. (author), Goussetis, G. (author), Lee, J. (author)Automotive engineers are repeatedly faced with the issue of choosing radars with the best angular resolution while having reduced processing times. In this paper, a novel extrapolation method is presented to estimate the amplitudes and phases for virtual antenna elements at the receiver periphery. This method has shown to resolve two targets...conference paper 2021
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- Gomez-Guillamon Buendia, V. (author), Liberto, S. (author), Goussetis, G. (author), Fonseca, N.J.G. (author) conference paper 2021
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Alrushud, K.M. (author), Gomez-Guillamon Buendia, V.A. (author), Podilchak, S.K. (author)A planar quasi-endfire surface-wave antenna (SWA) using substrate integrated waveguide (SIW) technology for integration with CubeSats and other small satellites is proposed in this letter. This antenna can be attached to the body of the satellite, resulting in a compact and low-cost design. A quasi-endfire beam pattern is achieved by the...article 2021
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Sberna, P.M. (author), Bernardis, A.F. (author), Garufo, A. (author), Bueno, J. (author), Llombart, N. (author), Neto, A. (author)Photo-conductive lens antennas (PCAs) exploit the ultra-short photoconductivity phenomenon of specific semiconductors in order to generate pulsed radiation in the THz regime. State of the art PCAs suffer from high dispersion and low radiation efficiency over the large generated bandwidth due to the poor coupling between the antenna and the...conference paper 2021
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de Jong, N.J. (author), Otten, M.P.G. (author), Cuenca, M.C. (author), Uysal, F. (author), de Wit, J.J.M. (author)This paper investigates the benefits of multichannel processing for inverse synthetic aperture radar (ISAR) imaging. There are potential advantages of multichannel processing in radar systems, for example, improved motion estimation, clutter suppression, extraction of supporting information, such as sea wave direction and speed, and ship wake...conference paper 2021
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Yepes, C. (author), Gandini, E. (author), Monni, S. (author), Neto, A. (author), van Vliet, F.E. (author), Cavallo, D. (author)In this letter, we present a design of a linear array of tilted dipoles to achieve radiation patterns with asymmetric angular filtering characteristics. To realize the asymmetric radiation, the dipole elements are spaced by a distance larger than half a wavelength, thus allowing for grating lobes to occur in the visible region. Moreover, the...article 2020
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Cox, P.B. (author), van Rossum, W.L. (author)Recent advances in digital beam forming for phased arrays in combination with digital signal processing should enable the development of multibeam radar in a bistatic configuration. In the bistatic setting, the pulse travelling outward from the transmitter should be followed or “chased” by the receiver. During transmission, depending on the...conference paper 2020
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Ericsson, A. (author), Sjoberg, D. (author), Gerini, G. (author), Cappellin, C. (author), Jensen, F. (author), Balling, P. (author), Fonseca, N.J.G. (author), de Maagt, P. (author)We present antenna system using a circular polarization selective surface (CPSS) to realize a circular polarization (CP) equivalent to the widely used linear polarization (LP) gridded or dual-gridded reflector (DGR). The CPSS is realized by a multilayer stack of nonresonant anisotropic meander line surfaces, achieving a very wide bandwidth. The...article 2020
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Gandini, E. (author), Silvestri, F. (author), Benini, A. (author), Gerini, G. (author), Martini, E. (author), Maci, S. (author), Vigano, M.C. (author), Toso, G. (author), Monni, S. (author)The design and experimental validation of a wide scanning dome antenna with reduced profile is presented. The antenna is based on the combination of a planar phased array with limited scanning capabilities and a dielectric lens which allows to broaden the field of view. The angular variation of the scan loss can be almost arbitrarily designed if...article 2020
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- den Hollander, R.J.M. (author), Adhikari, A. (author), Tolios, I. (author), van Bekkum, M. (author), Bal, A. (author), Hendriks, S. (author), Kruithof, M.C. (author), Gross, D. (author), Jansen, N. (author), Perez, G. (author), Buurman, K. (author), Raaijmakers, S.A. (author) conference paper 2020