Prof. Hendrik Rogier
Department of Information Technology (INTEC), IDLab-EM Group, Ghent University/IMEC, Technologiepark-Zwijnaarde 126, B-9052 Gent, Belgium
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Academic Career Length
31Years (1996-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications7 April 2009 in IEEE Transactions on Antennas and Propagation
Journal Article
CHCarla Hertleer
Carla Hertleer
Hendrik RogierLVLuigi Vallozzi
Luigi Vallozzi
Lieva Van langenhoveThe introduction of intelligent textile systems to increase the wearer's level of protection has exposed the necessity of wearable communication tools and has led to research in textile antennas. However, most textile fabrics are quite thin (0.5 mm), making it challenging for antenna designers to provide an antenna which operates adequately and resiliently in the 2.4-2.4835-GHz industrial-scientific-medical bandwidth. Flexible pad foam is commonly available in protective clothing and overcomes these constraints by providing a uniform, stable, and sufficient thickness. Moreover, its cellular structure and properties, such as flame retardance and water repellence, make it an excellent substrate material for the integration of antennas into protective garments. In this paper, we describe the design, manufacture, and performance of the first textile planar antenna to be implemented on flexible protective foam, suitable for firefighter garments. We employed shock absorbing foam with a thickness of 3.94 mm and achieved a nearly circularly polarized antenna with a bandwidth of more than 180 MHz even when the antenna was compressed or bent. These outstanding substrate and antenna characteristics result in an antenna that is highly appropriate for garment integration.
10 June 2010 in Optics Express
Journal Article
Optical wireless links can offer a very large bandwidth and can act as a complementary technology to radio-frequency links. However, optical components nowadays are rather bulky. Therefore, we have investigated the potential of silicon photonics to fabricate integrated components for wireless optical communication. This paper presents a two-dimensional phased array antenna consisting of grating couplers that couple light off-chip. Wavelength steering of 0.24°/nm is presented, reducing the need of active phase modulators. The required steering range is 1.5°. The 3dB angular coverage range of these antennas is 0.007π sr with a directivity of more than 38dBi and antenna losses smaller than 3dB.
26 February 2014 in IEEE Transactions on Antennas and Propagation
Journal Article
SASam Agneessens
Sam Agneessens
Hendrik RogierA novel wearable dual-band textile antenna, designed for optimal on-body performance in the 2.4 and 5.8 GHz Industrial, Scientific and Medical bands, is proposed. By using brass eye-lets and a combination of conducting and non-conductive textile materials, a half-mode substrate integrated waveguide cavity with ground plane is realized that is very compact and flexible, while still directing radiation away from the wearer. Additional miniaturization is achieved by adding a row of shorting vias and slots. Beside excellent free space performance in the 2.4 and 5.8 GHz bands, respectively, with measured impedance bandwidth of 4.9% and 5.1%, maximal measured free-space gain of 4.1 and 5.8 dBi, and efficiency of 72.8% and 85.6%, very stable on-body performance is obtained, with minimal frequency detuning when deploying the antenna on the human body and when bent around cylinders with radii of 75 and 40 mm. At 2.45 and 5.8 GHz, respectively, the measured on-body gain is 4.4 and 5.7 dBi, with sufficiently small calculated SAR values of 0.55 and 0.90 W/kg. These properties make the proposed antenna excellently suited for wearable on-body systems.
4 August 2011 in IEEE Transactions on Antennas and Propagation
Journal Article
MSMaria Lucia Scarpello
Maria Lucia Scarpello
DKDivya Kurup
Divya Kurup
Hendrik RogierDGDries Vande Ginste
Dries Vande GinsteFAFabrice Axisa
Fabrice Axisa
GVGunter Vermeeren
Gunter Vermeeren
+3
We present a flexible folded slot dipole implantable antenna operating in the Industrial, Scientific, and Medical (ISM) band (2.4-2.4835 GHz) for biomedical applications. To make the designed antenna suitable for implantation, it is embedded in biocompatible Polydimethylsiloxane (PDMS). The antenna was tested by immersing it in a phantom liquid, imitating the electrical properties of the human muscle tissue. A study of the sensitivity of the antenna performance as a function of the dielectric parameters of the environment in which it is immersed was performed. Simulations and measurements in planar and bent state demonstrate that the antenna covers the complete ISM band. In addition, Specific Absorption Rate (SAR) measurements indicate that the antenna meets the required safety regulations.
27 August 2007 in IEEE Antennas and Wireless Propagation Letters
Journal Article
CHCarla Hertleer
Carla Hertleer
ATAnneleen Tronquo
Anneleen Tronquo
Hendrik RogierLVLuigi Vallozzi
Luigi Vallozzi
Lieva Van langenhoveThe emergence of wearable textile systems in recent years exhibited the need for wireless communication tools integratable into garments. In literature, several planar antenna designs based on textile materials have been presented, however, without an adapted feeding structure for wearable applications. An aperture-coupled patch antenna (ACPA) meets this requirement since the rigid coaxial feed is replaced by a microstrip feed line that couples its power into the antenna through an aperture in the ground plane. This letter presents the first ACPA entirely made out of textile material. The result is a highly efficient, fully flexible, and wearable antenna that is integratable into garments.
11 July 2012 in IEEE Antennas and Wireless Propagation Letters
Journal Article
MSMaria Lucia Scarpello
Maria Lucia Scarpello
IKIlda Kazani
Ilda Kazani
CHCarla Hertleer
Carla Hertleer
Hendrik RogierDGDries Vande Ginste
Dries Vande GinsteWearable antennas, integrated into garments, are prone to get dirty. Therefore, for the first time in literature, washable antennas are proposed by covering textile antennas by a breathable thermoplastic polyurethane coating, protecting the antennas against water absorption and corrosion. The washability of coated wearable antennas produced by screen printing conductive ink onto a textile substrate is compared to coated wearable antennas based on an electrotextile, analyzing performance in terms of their reflection coefficient and radiation efficiency before and after washing. The combination of screen printing and coating provides stable antenna performance with sufficiently high radiation efficiency after several washing cycles.
About Me
Hendrik Rogier is currently a Senior Full Professor in the Department of Information Technology, Ghent University, and a Guest Professor with the Interuniversity Microelectronics Centre, Ghent. He received his M.Sc. and Ph.D. degrees in electrical engineering from Ghent University, Ghent, Belgium, in 1994 and 1999, respectively. From October 2003 to April 2004, he was a Visiting Scientist at the Mobile Communications Group of the Vienna University of Technology. He was a (co-)recipient of the URSI Young Scientist Award (twice) at the 2001 URSI Symposium on Electromagnetic Theory and at the 2002 URSI General Assembly, the 2014 Premium Award for Best Paper in the IET Electronics Letters, the Best Paper Award First Place in the 2016 IEEE MTT-S Topical Conference on Wireless Sensors and Sensor Networks, the Best Poster Paper Award at the 2012 IEEE Electrical Design of Advanced Packaging and Systems Symposium, the Best Paper Award at the 2013 IEEE Workshop on Signal and Power Integrity, the Joseph Morrissey Memorial Award for the First Best Scientific Paper at BioEM 2013, the Article of the Year 2022 Award by Journal of Sensors, and the 2023 IEEE APS Tapan K. Sarkar Best Conference on Antenna Measurements and Applications Student Paper Award. His current research interests include antenna systems, radio wave propagation, body-centric communication, numerical electromagnetics, electromagnetic compatibility, and power/signal integrity.