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735 results on '"Rogier, Hendrik"'

14. Wearable multi-antenna multi-band measurement system for personal radio-frequency exposure assessment

Author

Van Torre, Patrick, Agneessens, Sam, Aminzadeh, Reza, Thielens, Arno, Bossche, Matthias Van den, Joseph, Wout, Rogier, Hendrik, Magjarevic, Ratko, Editor-in-chief, Ładyżyński, Piotr, Series editor, Ibrahim, Fatimah, Series editor, Lacković, Igor, Series editor, Rock, Emilio Sacristan, Series editor, Eskola, Hannu, editor, Väisänen, Outi, editor, Viik, Jari, editor, and Hyttinen, Jari, editor

Published
2018
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19. Compact AFSIW Antenna With Integrated Digitally Controlled Impedance Tuner for Smart Surfaces

Author

Sennesael, Joryan, Kapusuz, Kamil Yavuz, Lemey, Sam, Van Torre, Patrick, and Rogier, Hendrik

Abstract

For unobtrusive smart-surface integration, an air-filled substrate-integrated waveguide (AFSIW) antenna for the [5.15-5.85]GHz band is co-designed with a tunable matching network and a cavity-integrated biasing circuit. It features a reconfigurable matching network to mitigate impedance mismatch due to objects in its reactive near field. A digitally controlled biasing circuit with switched-mode power supply is seamlessly integrated inside the air-filled antenna cavity to accurately control the matching network through a serial interface. The proposed impedance-tunable antenna covers an impedance bandwidth from 4.64 GHz to 6.09 GHz with a peak gain of 4.51 dBi at its center frequency. Measurements show that the cavity-integrated circuitry has negligible influence on the antenna performance, yielding novel integration potential. The impedance-tunable antenna is tested in a smart surface desktop integration scenario where it corrects detuning by objects placed on top, improving the wireless link for IEEE 802.11ac bands.

Published
2024
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20. Time-Domain-Optimized Antenna Array for High-Precision IR-UWB Localization in Harsh Urban Shipping Environments

Author

Gordebeke, Gert-Jan, Lemey, Sam, Caytan, Olivier, Boes, Michiel, Jocque, Jelle, Van de Velde, Samuel, Marshall, Chris, De Poorter, Eli, and Rogier, Hendrik

Abstract

Urban freight distribution via inland waterways is an important way to boost the quality of life in major urban areas with dense water networks. Cost-effective autonomous pallet shuttle barges (PSBs) are key to accelerate the shift from road-based transport to inland waterways. Yet, the urban settings impede reliable centimeter-level localization at critical waterway sections. In this article, we propose a time-domain-optimized antenna array to provide high-precision 3-D localization in these complex environments with minimal shore-side infrastructure by exploiting impulse-radio ultra-wideband (IR-UWB) technology. To enable joint distance and 2-D angle-of-arrival (AoA) estimation, we present a novel IR-UWB antenna element that covers channels 5 and 7 of the IEEE 802.15.4z standard, serving as a building block for scalable multi-antenna systems. By leveraging the air-filled substrate-integrated-waveguide (AFSIW) technology and adopting a multi-objective system-level optimization strategy, excellent performance is reconciled with a compact footprint and cost-effective fabrication. The 3-D positioning accuracy of a $2\times2$ array is evaluated in stand-alone conditions and when installed on a metal plate mimicking a PSB’s metal hull, showing that all distance errors and 97% of angular errors remain below 2 cm and 5°, respectively. Finally, three anchor nodes, each consisting of a $1\times4$ array connected to a Pozyx hardware platform, are installed on a vessel navigating in a narrow canal below a bridge in Ghent. With only one shore-side UWB beacon node deployed, 96% of AoA estimation errors remain below 10°, while the distance error remains below 10 cm, proving good installed performance in harsh urban shipping environments.

Published
2024
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23. Co-Design Strategies for AFSIW-Based Remote Antenna Units for RFoF

Author

Caytan, Olivier, primary, De Paula, Igor Lima, additional, Bogaert, Laurens, additional, Van Kerrebrouck, Joris, additional, Moerman, Arno, additional, Muneeb, Mohammad, additional, Torfs, Guy, additional, Bauwelinck, Johan, additional, Demeester, Piet, additional, Roelkens, Günther, additional, Lemey, Sam, additional, and Rogier, Hendrik, additional

Published
2023
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31. Microwave-Enabled Wearables: Underpinning Technologies, Integration Platforms, and Next-Generation Roadmap

Author

Wagih, Mahmoud, primary, Balocchi, Leonardo, additional, Benassi, Francesca, additional, Carvalho, Nuno B., additional, Chiao, Jung-Chih, additional, Correia, Ricardo, additional, Costanzo, Alessandra, additional, Cui, Yepu, additional, Georgiadou, Dimitra, additional, Gouveia, Carolina, additional, Grosinger, Jasmin, additional, Ho, John S., additional, Hu, Kexin, additional, Komolafe, Abiodun, additional, Lemey, Sam, additional, Loss, Caroline, additional, Marrocco, Gaetano, additional, Mitcheson, Paul, additional, Palazzi, Valentina, additional, Panunzio, Nicoletta, additional, Paolini, Giacomo, additional, Pinho, Pedro, additional, Preishuber-Pflugl, Josef, additional, Qaragoez, Yasser, additional, Rahmani, Hamed, additional, Rogier, Hendrik, additional, Lopera, Jose Romero, additional, Roselli, Luca, additional, Schreurs, Dominique, additional, Tentzeris, Manos, additional, Tian, Xi, additional, Torah, Russel, additional, Torres, Ricardo, additional, Van Torre, Patrick, additional, Vital, Dieff, additional, and Beeby, Steve, additional

Published
2023
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33. Reduced-order stochastic testing of interconnects subject to line edge roughness

Author

Huynen, Martijn, Waeytens, Ruben, Bosman, Dries, Gossye, Michiel, Rogier, Hendrik, and Vande Ginste, Dries

Subjects
Technology and Engineering
Abstract

In this contribution we study the propagation constant of interconnects subject to line edge roughness by means of an efficient stochastic framework. By employing the stochastic testing method, we succeed in limiting the number of calls to the full-wave electromagnetic field solver at the core of the system. Additionally, the computationally burdensome solution of the eigenvalue problem is eased by reducing its order through projection on an appropriate basis. The resulting two-step accel-eration leads to an effective approach to assess the effect of line edge roughness on the characteristics of interconnects. The novel framework is applied to a rough rectangular waveguide and a microstrip.

Published
2023

35. Air-Filled SIW Remote Antenna Unit With True Time Delay Optical Beamforming for mmWave-Over-Fiber Systems

Author

Lima de Paula, Igor, primary, Bogaert, Laurens, additional, Caytan, Olivier, additional, Van Kerrebrouck, Joris, additional, Moerman, Arno, additional, Muneeb, Muhammad, additional, Brande, Quinten Van den, additional, Torfs, Guy, additional, Bauwelinck, Johan, additional, Rogier, Hendrik, additional, Demeester, Piet, additional, Roelkens, Gunther, additional, and Lemey, Sam, additional

Published
2022
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38. Microwave-enabled wearables: underpinning technologies, integration platforms, and next-generation roadmap

Author

Wagih, Mahmoud, Balocchi, Leonardo, Benassi, Francesca, Carvalho, Nuno B., Chiao, J.-C., Correia, Ricardo, Costanzo, Alessandra, Cui, Yepu, Georgiadou, Dimitra, Gouveia, Carolina, Grosinger, Jasmin, Ho, John S., Hu, Kexin, Komolafe, Abiodun, Lemey, Sam, Loss, Caroline, Marrocco, Gaetano, Mitcheson, Paul, Palazzi, Valentina, Panunzio, Nicoletta, Paolini, Giacomo, Pinho, Pedro, Preishuber-Pflugl, Josef, Qaragoez, Yasser, Rahmani, Hamed, Rogier, Hendrik, Romero Lopera, Jose, Roselli, Luca, Schreurs, Dominique, Tentzeris, Manos, Tian, Xi, Torah, Russel, Torres, Ricardo, Van Torre, Patrick, Vital, Dieff, and Beeby, Steve

Abstract

This paper presents a holistic and authoritative review of the role of microwave technologies in enabling a new generation of wearable devices. A human-centric Internet of Things (IoT) covering remote healthcare, distributed sensing, and consumer electronics, calls for high-performance wearable devices integrated into clothing, which require interdisciplinary research efforts to emerge. Microwaves, the “interconnect” of wireless networks, can enable, rather than solely connect, the next generation of autonomous, sustainable, and wearable-friendly electronics. First, enabling technologies including wireless power transmission and RF energy harvesting, backscattering and passive communication, RFID, and electromagnetic sensing are reviewed. We then discuss the key integration platforms, covering smart fabrics and electronic textiles, additive manufacturing, printed electronics, natively-flexible and organic RF semiconductors, and fully-integrated CMOS systems, where opportunities for hybrid integration are highlighted. The emerging research trends, from mmWave 6G, RF sensing and imaging, to healthcare applications including neural implants, drug delivery, and safety upon exposure to microwaves are revisited and discussed, presenting a future roadmap for interdisciplinary research towards sustainable and reliable next-generation wearables.

Published
2022

39. Active Textile Antennas as a Platform for More Energy-Efficient and Reliable Wireless Links in Healthcare

Author

Rogier, Hendrik, Declercq, Frederick, Van Torre, Patrick, Vallozzi, Luigi, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin (Sherman), Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert, Series editor, Coulson, Geoffrey, Series editor, Godara, Balwant, editor, and Nikita, Konstantina S., editor

Published
2013
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40. Ultra-Robust Air-Filled Multiband Antenna for Smart Surface Integration

Author

Claus, Nicolas, Verhaevert, Jo, and Rogier, Hendrik

Subjects
Technology and Engineering
Abstract

A low-cost and highly efficient multiband antenna, operating in the SRD860 (863–870 MHz), 2.4-GHz ISM (2.4–2.4835 GHz) and LTE-7 (2.5–2.69 GHz) frequency standards, is proposed for deployment in smart surfaces. It exploits the electromagnetic shielding of a ridged air-filled cavity with completely metallized sidewalls, to enable extensive integration opportunities. Measurements demonstrate the excellent antenna robustness in several integration scenarios, indicating a great compatibility with a wide range of superstrates, as well as a strong isolation from supporting and surrounding materials.

Published
2022

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