Keynote and Invited Speakers

Elena Saenz

 Elena Saenz  (S’04–M’08) was born in Viana, Navarra, Spain, in 1981. She received the M.Sc. and Ph.D. degrees from the Public University of Navarra (UPNA), Pamplona, Spain, in 2004 and 2008, respectively, both in Telecommunication Engineering. Her doctoral research was focused on the analysis and design of meta-surfaces with emphasis on their application as superstrates for planar antennas.
Since 2008, she has been working at the European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Noordwijk, The Netherlands with main interest in frequency/polarization selective surfaces, (sub)millimetre wave technologies and applications, antenna measurements and RF material characterization. Since 2023, she is the Head of the Antennas and Sub-millimeter Waves Section.
She has supported several ESA missions for Earth Observation (MetOp Second Generation), Science (SPICA, JUICE), Robotic Exploration (ExoMars) and Telecommunication (SGEO).

Recent space antenna developments and RF testing capabilities at ESA

In the recent years ESA has developed several missions for different applications like Earth Observation, Science, Telecommunication, Navigation, and launchers with very challenging antenna requirements. This paper will present an overview of the latest developments, main characteristics and challenges of such antennas. Besides, the main highlights in the field of antennas extracted from the ESA 2040 technology vision will be presented.
At the same time, in order to be able to test those antennas, new testing facilities are needed with state-of-the-art characteristics. This paper will present the latest developments for antenna measurements and RF material characterization.

Petter Bedoire

Petter Bedoire started his career when he joined NobelTech Electronics in 1992 as a systems engineer involved in the design of the first generation Electronic Warfare System for the Gripen aircraft. Since then he has worked in several leading positions in operations, product management, strategy and marketing within Saab. His systems knowledge ranges all the way from detailed design to operational evaluation. His experience also includes several years of senior business positions such as VP Operations and VP Marketing and Sales. Currently Petter holds the position Chief Technology Officer at Saab AB.
He has a board position in WASP; Wallenberg AI, Autonomous Systems and Software Program, is a member of the Steering Committee for AI Sweden,  and is the Chairman of the Board for CISB, Swedish-Brazilian Research and Innovation Centre.
Petter holds a Master of Science in Electrical Engineering from the Royal Institute of Technology in Stockholm.

Technology Development in a World Shaped by Geopolitical Tensions

For decades, Saab has developed solutions with the mission to keep people and society safe. In an era marked by heightened geopolitical tensions, development of sensor systems plays a pivotal role in shaping global security. This keynote explores how advancements in microwave and antenna technologies address emerging challenges in defence, communications, and strategic resilience. Geopolitical uncertainties demand innovative solutions for secure data transmission, surveillance, and electronic warfare capabilities, emphasizing the intersection of technology and national security. The talk highlights the evolving landscape of microwave systems, phased array antennas, and adaptive technologies tailored to mitigate risks and ensure operational readiness. The aim of the session is to inspire researchers, engineers, and policymakers to harness the transformative power of microwave and antenna innovations while navigating the complexities of a divided geopolitical environment.

Miguel Beruete

Miguel Beruete is a Full Professor at the Universidad Pública de Navarra (UPNA), where he leads the TERALAB group and heads the Multispectral Biosensing Group at Navarrabiomed. His research focuses on photonics, with a strong emphasis on metamaterials, including plasmonics, extraordinary transmission metamaterials, invisibility cloaks, and radiative cooling devices. Throughout his career, Miguel has made significant contributions to the field, earning over 7,900 citations and an h-index of 49. He has published 160 journal papers and holds 5 patents. Miguel is involved in several high-profile EU, national, and regional research projects, including the MIRACLE and COOLCRETE projects, both of which explore the use of photonic metamaterials in radiative cooling and sustainable applications. His work has earned him numerous awards, including the 2024 Nanophotonics Research Award for Innovative Sustainability, 2023 Best Scientific Career Award from UPNA and recognition as one of the top 2% most-cited researchers by Stanford University.

Advanced Metasurfaces for Millimeter-Wave Wireless Communication Devices

The rapid growth of wireless communication technologies is pushing the boundaries of device performance, particularly at higher frequencies like millimeter-waves and terahertz, where greater bandwidth is naturally available. Metasurfaces, with their ability to dynamically manipulate electromagnetic waves, offer unprecedented opportunities for creating compact, efficient, and adaptable devices, addressing the open challenges in next-generation communication systems. In this presentation, I will address recent advancements in multifunctional metasurfaces, exploring both reconfigurable and non-reconfigurable designs for millimeter-wave applications.
While devices incorporating active elements are increasingly explored for applications such as Reconfigurable Intelligent Surfaces (RIS) and smart walls, non-reconfigurable designs with multifunctional capabilities offer a compelling alternative. These devices achieve adaptive functionalities by harnessing input parameters like polarization, angle of incidence, or frequency, avoiding the complexity of active control systems while enabling dynamic responses.
In this presentation, I will present novel multifunctional metasurfaces designed to produce distinct holograms at the output under different illumination conditions. The required phase distribution to get the multifunctional response is calculated by mixing analytical methods such as the Huygens-Fresnel principle and optimized through neural network-based techniques. While the work is focused on hologram generation, this methodology has the potential to extend to any other functionality such as multiple beam steering, focusing, vortex generation, etc., showcasing the versatility of the approach or mixing different functionalities. Both metallic and pure-dielectric designs will be presented, offering insights into the trade-offs and advantages of each approach. Furthermore, I will showcase a reconfigurable reflectarray based on liquid crystal technology operating in the W-band of millimeter-waves, demonstrating its potential for beam shaping and dynamic wave control.
These metasurface designs open new avenues to cover the demands of future communication systems, underscoring the value of analytical modeling and advanced optimization in driving

David R. Jackson

David R. Jackson was born in St. Louis, MO on March 28, 1957. He obtained the B.S.E.E. and M.S.E.E. degrees from the University of Missouri, Columbia, in 1979 and 1981, respectively, and the Ph.D. degree in electrical engineering from the University of California, Los Angeles, in 1985. From 1985 to 1991 he was an Assistant Professor in the Department of Electrical and Computer Engineering at

the University of Houston, Houston, TX. From 1991 to 1998 he was an Associate Professor in the same department, and since 1998 he has been a Professor in this department. He has been a Fellow of the IEEE since 1999. His present research interests include microstrip antennas and circuits, leaky-wave antennas, wave propagation effects including surface waves and leaky waves, leakage and radiation effects in microwave integrated circuits, periodic structures, and electromagnetic compatibility and interference. He serves on the IEEE Antennas and Propagation Society (AP-S) Committee on Promoting Equality (COPE), AP-S Technical Committee 5 (Electromagnetics and Fundamentals) and on the MTT-1 (Microwave Field Theory) Technical Committee of the Microwave Theory and Technology Society. He is also serving as the Vice Chair of the IEEE AP-S Constitution and Bylaws Committee. Previously, he has served as the chair of USNC-URSI (The United States National Committee for the International Union of Radio Science). He has been the chair of the Distinguished Lecturer Committee of the IEEE AP-S, the chair of the Transnational Committee of the IEEE AP-S, the chair of the Chapter Activities Committee of the AP-S, a Distinguished Lecturer for the AP-S, a member of the AdCom for the AP-S, and an Associate Editor for the IEEE Transactions on Antennas and Propagation. He has also served as the chair of Commission B of USNC-URSI and as the Secretary of this Commission. He also previously served as an Associate Editor for the Journal Radio Science and the International Journal of RF and Microwave Computer-Aided Engineering.

Recent Developments in Leaky-Wave Antennas

A leaky-wave antenna (LWA) is a type of traveling-wave antenna, where the structure supports a guided wave that radiates (leaks power) as it propagates on the structure, forming a directive beam. One-dimensional (1-D) LWAs support a wave traveling in one direction and radiate a conical or fan-shaped beam. This type of LWA can be either a uniform or a periodic type of LWA. For a 1-D periodic LWA the open stopband at broadside is problematic and causes beam degradation as the beam is scanned through broadside, though techniques can be used to overcome this problem. A two-dimensional (2-D) LWA is one where a structure supports a radially-propagating leaky wave, excited by a central source. The Fabry–Pérot resonant cavity antenna is the most common example

of such a LWA, where a partially reflecting surface (PRS) is placed above a grounded substrate (which may be air). This type of LWA can produce a symmetrical pencil beam at broadside, or a narrow conical beam at broadside, depending on the type of source (e.g., HMD or VED). Recent developments for both types of LWAs will be overviewed here. For 1-D LWAs, this includes new accurate formulas for predicting the pattern and maximizing the gain for finite-size practical structures, and examining new simple structures based on microstrip line for overcoming the stopband problem. For 2-D LWAs, this includes new formulas for optimizing the PRS structure to

achieve maximum gain or directivity, for both infinite and finite structures, and exploring the properties of narrow null beams at broadside produced by VED or other sources.

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Almudena Suarez

Almudena Suárez received her Ph.D. in Physical Sciences from the Universidad de Cantabria in 1992, and her Ph.D. in Electronics from the University of Limoges, France, in 1993. She is currently a full professor at Universidad de Cantabria (Spain). She has been an IEEE Fellow since 2012. She was an IEEE Distinguished Microwave Lecturer from 2006 to 2008. She has published 115 papers in IEEE journals, with 79 papers in IEEE Transactions on Microwave Theory and Techniques (IEEE T-MTT). She has authored the book “Analysis and Design of Autonomous Microwave Circuits” (IEEE-Wiley, 2009) and co-authored the book “Stability Analysis of Nonlinear Microwave Circuits” (Artech House, 2003). She was a member of the Board of Directors of European Microwave Association (EuMA) from 2012 to 2020. She received the Research Award of the Social Council of the University of Cantabria in 2021. She was the coordinator of the Communications and Electronic Technology Area for the Spanish National Evaluation and Foresight Agency (ANEP) from 2009 to 2013. She was the chair of the 2014 and 2015 editions of IEEE Topical Conference on RF/Microwave Power Amplifiers (PAWR). She was the General TPC Chair of European Microwave Week in 2018. She was the Editor-in-Chief of IJMWT from Cambridge University Press from 2013 to 2018. She has been an Associate Editor for IEEE Microwave Magazine since 2014 and was an Associate Editor for IEEE T-MTT in 2019-2022. She was the Chair of the IEEE Subcommittee for the Best paper Award in IEEE Microwave Magazine from 2017 to 2021. Since 2023 she is the Editor-in-Chief of IEEE T-MTT.

Wirelessly Locked Oscillators for Tag-to-Reader Communications ​

As the demand for connectivity continues to grow, the need for compact, energy-efficient communication systems has led to innovative approaches, such as transmit/receive concepts based on injection-locked oscillators. These systems offer promising solutions for tag-to-reader communications, where two oscillators are wirelessly locked to enable efficient signal transmission. However, they are often analyzed with overly simplistic oscillator models, which will generally fail to accurately predict the behavior of transistor-based oscillators, especially under higher input amplitudes, such as when antennas are brought closer together. The talk presents advanced analysis methods that address these challenges by employing comprehensive nonlinear models of oscillator circuits, derived from harmonic balance simulations. This novel approach overcomes previous limitations through a semi-analytical formulation that allows for the exhaustive calculation of all coexisting solution curves in a single simulation, without the need for iterative continuation techniques. We will explore a specific application of this methodology in a motion-sensing system, where one oscillator functions as a self-injection-locked tag and the other as a receiver, incorporating a realistic description of the antenna and propagation effects. The new methods enable a deeper understanding of the complex geometry of the solution curves, distinguishing between stable, physically observable states and unstable ones. This approach offers valuable insights into how these methodologies can significantly enhance the design and reliability of next-generation communication systems.  

Rodolfo Feick

Rodolfo Feick, Life Senior Member of IEEE, is a full professor at Universidad Técnica Federico Santa María (UTFSM) in Valparaíso, Chile. Until 2009, he was with the Department of Electronics Engineering at UTFSM doing research and teaching courses in telecommunications. Since then he has held the position of Associate Researcher at the Centro Científico y Tecnológico de Valparaíso (CCTVal), also belonging to UTFSM. His current research interests center on statistical propagation channel modeling. He has led a more than 20-yearlong collaboration between researchers at UTFSM and Bell-Labs in N.J. resulting in over 40 co-authored journal and conference papers. He has been responsible for the design of multiple channel sounding systems that have provided empirical support for this work. Since 2016 this has led to the construction of pairs of sounders at 28 GHz, 60 GHz and 140 GHz, built with the support of Nokia/Bell-Labs and used in Chile, the US, Germany, Finland and Greece. 

Millimeter Wave Channel Modeling for Reliable Coverage Prediction in Outdoor and Indoor Environments 

We present statistical models for millimeter wave (mmWave) propagation in the frequency bands of 28 GHz, 60 GHz and 140 GHz. Uniquely, our models are based on a massive set of indoor, indoor-to-outdoor and outdoor measurements, obtained at multiple locations in diverse countries. Enabled by a custom design aimed at transportability, long battery life and quick deployment, our sounders are capable of acquiring a full angular power spectrum in 0.2 seconds with a resolution better than 0.5 degrees. We briefly describe the specific features of our sounders and then focus on the results of our measurement campaigns and the statistical path-loss models derived from them. We discuss various models, their physical justification, common features and the effect of rising frequency.

Carolina Vigano

Maria Carolina Viganó received the Laurea (summa cum laude) degree in telecommunication engineering from the University of Florence, and the Ph.D. degree cosponsored by the Delft University of Technology, Thales Alenia Space Toulouse, and ESA-ESTEC. After years as a Research and Development Antenna Engineer at ESA first and later at Viasat, she is now leading the Terminal and Payload Development Group. Her research interests include phased arrays, satellite communication antennas, and synthesis techniques for non-regular arrays. Dr. Viganò is currently on the industry board for SATNEX V, part of the MTT-TC29, co-chair of the of the EurAAP Active Array Antennas working group and industrial liaison for Eucap25. Recently Dr. Viganó has being appointed member of Swiss Federal Commission for Space Affairs and EurAAP delegate for Switzerland, Austria and Liechtenstein. 

Ka band phased array terminals: achievements and new challenges

With the uprising of new satellite constellations in lower orbits, phased array antennas are finally becoming a reality with many examples available on the market. A review of the work done at Viasat will be presented, covering different verticals from airborne to land and even space applications. The main challenges faced during the design and manufacturing phases will be disclosed and discussed. Several generations with different features will be presented with special attention given to those currently under development.

Yong Mei Pan

Yong-Mei Pan is a full professor at the School of Electronics and Information, South China University of Technology, China. Her research focuses on dielectric resonator antennas, filtering antennas, MIMO antennas, and antenna-in-package, with over 130 SCI-indexed papers published and 10 US patents granted. Dr. Pan was awarded the IEEE Antennas and Propagation Society's Lot Shafai Mid-Career Distinguished Achievement Award in 2022, the Guangdong Province Science and Technology Award for Technological Invention (First Class) in 2020, and the Ministry of Education’s Higher Education Scientific Research Outstanding Achievement Award for Natural Science (First Class) in 2016. Dr. Pan served as an Associate Editor for the IEEE Transactions on Antennas and Propagation (TAP) from August 2016 to October 2022, and she is currently a Track Editor of TAP.

Self-Decoupling Techniques for MIMO Antennas and Their Application in Phased Array Designs  

MIMO technology is essential for boosting system channel capacity and network transmission rates. However, mutual coupling between MIMO antenna elements often deteriorates antenna matching, reduces radiation efficiency, and can even impact overall communication performance. Consequently, mitigating inter-antenna coupling has become a critical challenge in the development of high-performance MIMO communication systems. Traditional solutions typically involve adding additional decoupling structures, such as metamaterials, decoupling networks, electromagnetic bandgap structures, and defective grounds, either between or above the antenna elements to directly or indirectly weaken the coupling fields. This significantly increases the complexity, height, and loss of MIMO arrays.

This report will highlight our team's research on self-decoupling theory and technology for MIMO antenna arrays, alongside presenting innovative design methods for wide-angle scanning phased arrays utilizing self-decoupled antenna elements.

Diego Masotti

Diego Masotti joined the University of Bologna in 1998 where he now serves as a Full Professor of electromagnetic fields. From 2021 he has the role of coordinator of the Telecommunications Engineering Master Degree course. His research interests are in the areas of nonlinear microwave circuit simulation and design, with emphasis on nonlinear/electromagnetic co-design of integrated radiating subsystems/systems for wireless power transfer and energy harvesting applications. He authored more than 80 scientific publications on peer reviewed international journals and more than 190 scientific publications on proceedings of international conferences and is IEEE Senior Member since 2016. Dr. Masotti serves in the Editorial Board of Electronic Letters, of IEEE Access and IEEE Journal on RFID. 

Advanced Strategies for Effective Wireless Transmission of Energy: A Review 

This work presents an overview of two antenna array technologies: Frequency Diverse Arrays and Time Modulated Arrays. Once their operating principle is recalled, some of the latest research advancements on these radiating systems are described, mainly focusing on their use as smart radiators for wireless power transfer applications. Successively, a comparison between these architectures and other solutions available in the literature is given. In this context, both the radiating performance and the design feasibility of these solutions are taken into account. The proposed antenna arrays show innovative capabilities that make them interesting solutions for future wireless powering systems.

Dirk Heberling

Dirk Heberling (born 15.08.1961) (M’03-SM’10) studied electrical engineering and graduated with a Dipl. Ing. degree from RWTH Aachen University, Aachen, Germany in 1987. There he also received the Dr. Ing. degree in 1993 for his thesis on conformal microstrip antennas.

From 1987 to 1993 he was employed as a scientist at the Institute for RF-Technologies, RWTH Aachen University. In 1993 he joined IMST GmbH, Kamp-Lintfort, Germany to establish a new Antenna Section and from 1995 to 2003 he was head of the Antennas Department, which was reorganized into the Department of Antennas and EMC in 1998. From 2003 to 2008 he took over the Department of Information and Communication Systems of IMST GmbH and in 2008 he moved to RWTH Aachen University where he is Head of the Institute and holder of the chair for High Frequency Technology. In addition 2016 he became director of the Fraunhofer Institute for High Frequency Physics and Radar Techniques, FHR.

Prof. Dr. Ing. Heberling is a member of VDE and from 1998 to 2017 he has been a member of the ITG expert group 7.1 "Antennen" which he directed as a chairman from 2002 to 2003 and from 2014 to 2017 again. During this time he was responsible as General Chairman and organizer of the international antenna conference INICA 2003, September 2003, Berlin and the German Microwave Conference GeMiC 2014, March 2014, Aachen. Since 1998 he has been a member of the European competence projects for antennas COST 260, COST 284, IC0603 and IC1102, from 2002 to 2007 he was the German delegate of COST 284 and from 2011 to 2016 the German delegate and secretary of IC1102. From 2002 to 2003 he was co-organizer of the European network of excellence on antennas ACE. He is member of the steering committee and organizing committee for the European Conference on Antennas and Propagation, EuCAP. From 2016 to 2019 he was member of the Board of Directors of the Antenna Measurement Techniques Association (AMTA) and became president in 2018 and senior member since 2020. 2016 he was elected for 4 years in the technical decision board (Fachkollegiat) of the German Reseach foundation DFG.

Robotic Antenna Measurements: Opportunities and Challenges

 Industrial robots remain a relatively new technology in the field of antenna measurements, yet increasingly mature systems are emerging within both industry and academia. Their high flexibility, precision, and reliability make them an attractive alternative to traditional positioning systems, particularly for production testing and multifunctional facilities. Robotic positioning systems further enable the efficient implementation of irregular sampling grids, compressed sensing techniques, and support measurements in environments with spatial constraints. However, like most emerging technologies, they introduce challenges, such as alignment, trajectory planning, and the design of suitable radio frequency subsystems. This talk will explore the opportunities enabled by robotic antenna measurement systems and address the challenges encountered during the development of a robot-based mm-Wave test range at the Institute of High Frequency Technology, RWTH Aachen University.

Nicolas Capet 
Dr. Nicolas Capet is the CEO and founder of Anywaves, Europe's first pure player in space antennas for constellations. A graduate of ENAC engineering school, he earned his Ph.D. in electromagnetism and microwaves from Toulouse University and ONERA. Nicolas began his career at CNES as an antenna engineer, where he developed innovative solutions for future space missions, particularly in telecommunications and navigation. His work included groundbreaking research on metamaterial concepts applied to antennas, such as flat metasurfaces, compact waveguides, and 3D-printed dielectric metasubstrates. In 2017, he founded Anywaves, a CNES spin-off supported by ESA, which has become a leader in designing and manufacturing high-performance antennas for small satellite constellations. With more than 65 scientific publications and 25 patents to his name, Nicolas is also a passionate advocate for the NewSpace sector in Europe. He serves as Vice President of YEESS and is a board member of Club Galaxie. 

​Innovative Antenna Solutions for NewSpace: Addressing the Challenges of Small Satellite Constellations 

This presentation provides an in-depth review of Anywaves' current and future antenna solutions tailored for the NewSpace era, with a particular focus on small satellite constellations. Despite the disruptive innovations brought by NewSpace, designing antennas for space applications remains a complex challenge due to stringent environmental constraints. The rise of constellations has introduced new demands: platforms are becoming smaller while production volumes are scaling up significantly. From a technological perspective, these trends call for innovative approaches to address the unique challenges faced by antenna designers. Whether for telecommunications, navigation, Earth observation, science, or exploration, mission success hinges on the reliability and performance of antennas. This talk will explore Anywaves' R&D strategies and innovations aimed at meeting these demands, highlighting how we combine cutting-edge technology with industrial scalability to support the evolving needs of the space industry.

Jorge L. Salazar-Cerreño

Jorge L. Salazar-Cerreno earned his B.S. in Electrical and Computer Engineering (ECE) from the Universidad Antenor Orrego in Trujillo, Peru, followed by an M.S. degree in ECE from the University of Puerto Rico, Mayaguez (UPRM). He completed his Ph.D. in ECE at the University of Massachusetts, Amherst, in 2011, focusing his research on the development of low-cost dual-polarized active phased array antennas (APAA) for the Engineering Research Center for Collaborative Adaptive Sensing of the Atmosphere (CASA).Following his graduation, Dr. Salazar-Cerreno was awarded a prestigious postdoctoral fellowship with the National Center for Atmospheric Research (NCAR) Advanced Study Program (ASP). At NCAR, he contributed to the Earth Observing Laboratory (EOL) division, where he developed innovative airborne technology for two-dimensional, electronically scanned, dual-polarization phased array radars, significantly enhancing atmospheric research capabilities. This technology plays a crucial role in studying weather phenomena and related hazards, particularly in retrieving dynamic and microphysical characteristics of clouds and precipitation over challenging terrains or open ocean areas, where traditional radar systems face limitations.In July 2014, he joined the Advanced Radar Research Center (ARRC) at the University of Oklahoma as a research scientist and became an associate professor at the School of Electrical and Computer Engineering in August 2021. His research interests encompass high-performance, broadband antennas for dual-polarized digital phased array radar applications; array antenna architectures for reconfigurable radar systems; APAA; Tx/Rx modules; radome electromagnetic modeling; and RF and hardware development for the characterization and calibration of APAA and millimeter-wave antennas.In recognition of his contributions, Dr. Salazar was awarded the William H. Barkow Presidential Professorship in 2019. Presidential Professors are known for inspiring and mentoring undergraduate and graduate students through research and creative scholarly activities while exemplifying the ideals of a scholar in teaching, research, and professional service.Dr. Salazar is an active member of the Board of Directors of the Antenna Measurement Techniques Association (AMTA) and serves as the Technical Coordinator for the AMTA Symposium in both 2024 and 2025. He is also a senior member of the IEEE and serves as a reviewer for esteemed publications, including IEEE Transactions on Antennas and Propagation (TAP), IET Microwaves, Antennas and Propagation (IET), the Journal of Atmospheric and Oceanic Technology (JTECH), IEEE Transactions on Geoscience and Remote Sensing (TGARS), John Wiley and Sons, and the Radio Science Journal. https://www.ou-arrc-paard.com/

Advancements in Measurement and Calibration of Multifunction Phased Array Radars: Exploring Future Research Directions

The field of phased array radar technology is experiencing remarkable advancements, driven by the increasing demands for high-performance systems in communication, remote sensing, defense and atmospheric research. This presentation will highlights the latest innovations in measurement and calibration techniques for multifunction phased array radars, which are essential for ensuring optimal operation and accuracy in diverse applications. Recent developments have led to the emergence of novel phased array architectures that offer enhanced capabilities, such as multifunctionality, reconfigurability, and improved scanning performance. Key features of these systems include rapid volumetric scanning with update times of less than 20 seconds and wide field-of-view capabilities, covering scanning angles from 90 to 170 degrees. Additionally, these systems are designed to achieve ultra-low cross-polarization isolation, typically below 40 dB, which is critical for minimizing interference and improving signal integrity. As these technologies evolve, the need for robust measurement and calibration methodologies becomes increasingly important. This presentation will explore cutting-edge research directions focused on advanced calibration techniques that ensure the precision and reliability of phased array systems. Emphasis will be placed on the integration of millimeter-wave technology, which enhances the performance of radar systems for applications such as weather observation and environmental monitoring. Furthermore, we will discuss the implications of these advancements for future research initiatives and collaborations in the field. By addressing the challenges associated with the measurement and calibration of multifunction phased array radars, we can pave the way for innovative solutions that will significantly enhance our understanding of atmospheric phenomena and improve radar system capabilities for various applications.

Joachim Oberhammer

Joachim Oberhammer is a professor in Microwave and THz Microsystems at the School of Electrical Engineering and Computer Science, Dept. of Micro and Nanosystems, KTH Royal Institute of Technology in Stockholm, Sweden, since 2015. He has lead radio-frequency/microwave/terahertz micro-electromechanical systems research at KTH for over 15 years. He is author and co-author of more than 200 reviewed research papers, holds 4 patents, and has received 8 Best Paper Awards at scientific conferences and a Consolidator Grant by the European Research Council (ERC). His career includes positions as guest professor "Chair of Excellence" at Universidad Carlos III de Madrid, Spain, and guest researcher stays at Nanyang Technological University, Singapore and at the NASA-Jet Propulsion Laboratory, USA. He is recipient of an European Research Council (ERC) Consolidator Grant, has been an Associate Editor of IEEE Transactions on Terahertz Science and Technology 2018-2021, Steering Group member of the IEEE MTT-S and AP-S Chapters Sweden since 2009, has been Steering Group member of the Young Academy of Sweden 2014-2016, Scientific coordinator of the EU RIA H2020 projects Car2TERA and M3TERA, as well as PI of two SEK 35 million strategic framework grants on electronics and terahertz communication, and received the 2023 Young Engineer Award by the European Microwave Association as well as 8 Best Paper Awards of which 6 at IEEE conferences.

THz antennas for communication and sensing - enabled by silicon micromachining

The 100-1000 GHz frequency spectrum is offering large bandwidths for communication and sensing applications, but is still lacking many technology solutions which are needed for a large-scale exploitation. It is very difficult to implement high-performance antennas in this frequency range, due to increased losses and poor fabrication tolerances of conventional fabrication methods scaled from lower frequencies. Silicon-micromachining is a fabrication technology which enables 3-dimensional geometries of micrometer accuracy with nanometer surface roughness – both essential properties for enabling devices far into the THz frequency spectrum. This talk presents an overview of micromachined antennas in the sub-THz and THz frequency spectrum. It includes examples of antenna arrays with up to 1024 elements at 320-400 GHz, and leaky-wave antennas using planar quasi-optical focussing techniques for beam-steering at 220-300 GHz. Furthermore, pure-dielectric micromachined high-gain antennas in the 500-750 GHz frequency range, utilizing Fresnel-zone lenses will be shown in fixed beam as well as in multi-beam beam-steering implementations. System-level demonstrators will also be presented, including a micromachined D-band front-end module including an integrated diplexer module, and a 240 GHz in-cabin car radar beam-steering and beam-shape switching front-end enabled by micromachining.