Antoine G. Roederer | |
|---|---|
 Antoine Georges Roederer | |
| Born | 1943 Paris, France |
| Occupation | European Space Agency Scientist |
| Years active | 1968 - present |
| Known for | Research on satellites & antenna |
Antoine Georges Roederer (born in Paris, 1943) is a French engineer and scientist known for his significant contributions to antenna systems and satellite communications design. He is notably associated with the European Space Agency and Delft University of Technology.
Roederer was born in Paris, France, in 1943. He earned a B.S.E.E. from Ecole Superieure d'Electricite, Paris, in 1964, an M.S.E.E. from the University of California, Berkeley, in 1965, and a Ph.D. in Electrical Engineering from the University of Paris VI in 1972. [1]
From 1968 to 1973, he worked with Thomson-CSF as a Radar Antenna R&D Engineer. Roederer then worked at The European Space Research and Technology Centre, part of the European Space Agency (ESA, formerly ESRO) from 1973 until his retirement in 2008, playing a crucial role in developing advanced satellite communications technologies. [1] Currently, he is a scientific advisor and a guest associate professor at Delft University of Technology (TU Delft). [1] [2]
Roederer's work has impacted the fields of satellite communications, telecommunications infrastructure, 5G technology, broadcasting, GPS, disaster management, and environmental monitoring. His contributions include innovative compact antenna designs for circuplarly polarised broadcasting and commuvications, analysis of mutual coupling and scattering in finite arrays, multibeam antenna systems and beamforming techniques, semi-active antennas, microwave hybrid couplers, thermal management in antennas and advancements in 5G technology. During his time at ESA, Roederer contributed to several missions, including Artemis, Herschel Space Observatory, Gaia, the Galileo Satellite Navigation System,as well as the INMARSAT satelite programmes. In 2000, Roederer initiated and chaired the Millennium Conference on Antennas and Propagation (AP 2000), Davos, which was the precursor of the large EUCAP conferences. [1]
Roederer holds numerous patents, including:
Source: [8]
Roederer has received several awards and recognitions by various organisations in his field. Below is a selection of rewards and recognitions.
Antoine Roederer has three children with his wife Judy. His hobbies include mountaineering, skiing, hiking, cycling and chess.
Extremely high frequency is the International Telecommunication Union designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz). It lies between the super high frequency band and the far infrared band, the lower part of which is the terahertz band. Radio waves in this band have wavelengths from ten to one millimeter, so it is also called the millimeter band and radiation in this band is called millimeter waves, sometimes abbreviated MMW or mmWave. Millimeter-length electromagnetic waves were first investigated by Jagadish Chandra Bose, who generated waves of frequency up to 60 GHz during experiments in 1894–1896.
A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz. They are used as feed antennas for larger antenna structures such as parabolic antennas, as standard calibration antennas to measure the gain of other antennas, and as directive antennas for such devices as radar guns, automatic door openers, and microwave radiometers. Their advantages are moderate directivity, broad bandwidth, low losses, and simple construction and adjustment.
Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception. This is achieved by combining elements in an antenna array in such a way that signals at particular angles experience constructive interference while others experience destructive interference. Beamforming can be used at both the transmitting and receiving ends in order to achieve spatial selectivity. The improvement compared with omnidirectional reception/transmission is known as the directivity of the array.
Constantine A. Balanis is a Greek-born American scientist, educator, author, and Regents Professor at Arizona State University. Born in Trikala, Greece on October 29, 1938. He is best known for his books in the fields of engineering electromagnetics and antenna theory. He emigrated to the United States in 1955, where he studied electrical engineering. He received United States citizenship in 1960.
John Daniel Kraus was an American physicist and electrical engineer known for his contributions to electromagnetics, radio astronomy, and antenna theory. His inventions included the helical antenna, the corner reflector antenna, and several other types of antennas. He designed the Big Ear radio telescope at Ohio State University, which was constructed mostly by a team of OSU students and was used to carry out the Ohio Sky Survey. Kraus held a number of patents and published widely.
Space-based solar power is the concept of collecting solar power in outer space with solar power satellites (SPS) and distributing it to Earth. Its advantages include a higher collection of energy due to the lack of reflection and absorption by the atmosphere, the possibility of very little night, and a better ability to orient to face the Sun. Space-based solar power systems convert sunlight to some other form of energy which can be transmitted through the atmosphere to receivers on the Earth's surface.
In telecommunications, a diversity scheme refers to a method for improving the reliability of a message signal by using two or more communication channels with different characteristics. Diversity is mainly used in radio communication and is a common technique for combatting fading and co-channel interference and avoiding error bursts. It is based on the fact that individual channels experience fades and interference at different, random times, i.e., they are at least partly independent. Multiple versions of the same signal may be transmitted and/or received and combined in the receiver. Alternatively, a redundant forward error correction code may be added and different parts of the message transmitted over different channels. Diversity techniques may exploit the multipath propagation, resulting in a diversity gain, often measured in decibels.
In radio, multiple-input and multiple-output (MIMO) is a method for multiplying the capacity of a radio link using multiple transmission and receiving antennas to exploit multipath propagation. MIMO has become an essential element of wireless communication standards including IEEE 802.11n, IEEE 802.11ac, HSPA+ (3G), WiMAX, and Long Term Evolution (LTE). More recently, MIMO has been applied to power-line communication for three-wire installations as part of the ITU G.hn standard and of the HomePlug AV2 specification.
The IEEE Heinrich Hertz Medal was a science award presented by the IEEE for outstanding achievements in the field of electromagnetic waves. The medal was named in honour of German physicist Heinrich Hertz, and was first proposed in 1986 by IEEE Region 8 (Germany) as a centennial recognition of Hertz's work on electromagnetic radiation theory from 1886 to 1891. The medal was first awarded in 1988, and was presented annually until 2001. It was officially discontinued in November 2009.
Walter Rotman was an American scientist known for his work in radar and antenna design. Among his inventions were the Rotman lens, the sandwich wire antenna, and the trough waveguide.
The first smart antennas were developed for military communications and intelligence gathering. The growth of cellular telephone in the 1980s attracted interest in commercial applications. The upgrade to digital radio technology in the mobile phone, indoor wireless network, and satellite broadcasting industries created new opportunities for smart antennas in the 1990s, culminating in the development of the MIMO technology used in 4G wireless networks.
Marianna Ivashina is a professor in Antenna Systems at Chalmers University of Technology, Gothenburg, Sweden.
ALCAN Systems GmbH is a telecommunications company based in Darmstadt, Germany. The company is develops antenna systems for fixed, mobile, cellular and satellite-communication.
A reflectarray antenna consists of an array of unit cells, illuminated by a feeding antenna. The feeding antenna is usually a horn. The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of the beam, but each cell adds a different phase delay to the reflected signal. A phase distribution of concentric rings is applied to focus the wavefronts from the feeding antenna into a plane wave . A progressive phase shift can be applied to the unit cells to steer the beam direction. It is common to offset the feeding antenna to prevent blockage of the beam. In this case, the phase distribution on the reflectarray surface needs to be altered. A reflectarray focuses a beam in a similar way to a parabolic reflector (dish), but with a much thinner form factor.
Douglas Henry Werner is an American scientist and engineer. He holds the John L. and Genevieve H. McCain Chair Professorship in the Penn State Department of Electrical Engineering and is the director of the Penn State University Computational Electromagnetics and Antennas Research Laboratory. Werner holds 20 patents and has over 1090 publications. He is the author/co-author of 8 books. His h-index and number of citations are recorded on his Google Scholar profile. He is internationally recognized for his expertise in electromagnetics, antenna design, optical metamaterials and metamaterial-enabled devices as well as for the development/application of inverse-design techniques.
Earl W. McCune Jr. was an American electrical engineer, telecommunications engineer, inventor, Silicon Valley entrepreneur, and IEEE Fellow. He is known for his research on achieving "Green" communications systems that have optimal energy efficiency.
Nacer E. Chahat is a French Algerian-American engineer and researcher at the National Aeronautics and Space Administration (NASA) Jet Propulsion Laboratory.
Satish Kumar Sharma is a professor of Electrical and Computer Engineering and the director of the Antenna and Microwave Laboratory (AML) at San Diego State University (SDSU).
Yang Hao is a British electrical engineer, academic, and author most known for his research in wireless connectivity and metamaterials. He is the holder of the QinetiQ/Royal Academy of Engineering (RAE) Research Chair, and serves as the Director of both the EPSRC Research Centre on Future Wireless Connectivity and the EPSRC Centre for Transformation Optics and Metamaterials. He is also a Professor of Antennas and Electromagnetics, and Deputy Vice Principal for Strategic Research at Queen Mary University of London (QMUL). He is a Co-Founder and Director of AOTOMAT, and co-founded a satellite communication company called Isotropic Systems.
Marta Martínez-Vázquez is a Spanish electrical engineer known for her work on the design of antennas, especially for personal electronics.
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