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Millimeter/Terahertz and nano-optical antennas
16:40 Invited talk: Conformal leaky-wave antennas for terahertz wireless links
Hichem Guerboukha, Rabi Shrestha, Joshua Neronha, Zhaoji Fang, Daniel Mittleman
Brown University (USA)
We explore the performance of curved leaky-wave antennas in the terahertz range. We identify two distinct regimes in whichthe far-field emission pattern varies relative to that of a planar antenna. We show that a curved multi-aperture leaky-waveantenna can be used for agile far-field beam forming, and demonstrate high-gain wireless links at gigabit-per-second data ratewith low bit error rate, in multiple directions simultaneously. This work lays the foundation for the implementation of terahertzleaky-wave structures in conformal geometries.
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17:00 Invited talk: The physics of optical patch antennas
Antoine Moreau
Université Clermont Auvergne (France)
In the last ten years, optical patch antennas have emerged as a platform allowing for a complete control of light -- from huge Purcell enhancement to wavefront control. We review here the rich physics of these antennas, ranging from plasmonic slowdown of light to the impact of nonlocality on the optical response and show that a "gap-plasmon optics" can be established, bringing a full and thorough understanding of such structures.
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17:20 Invited talk: Status and progress of millimeter-wave GaN transistors for next generation high-power radar systems
Kathia Harrouche, Sri Saran Vankatachalam, Elodie Carneiro, François Grandpierron, Farid Medjdoub
CNRS-IEMN (France)
With the development of wireless communication such as 5G or SATCOM, the need and requirements for millimeter-wave compact solid-state high power amplification has significantly increased. In this presentation, we will discuss some potential device design enabling to properly operate in the millimeter-wave range under high drain bias $textgreater$ 20 V with high performance.
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17:40 Invited talk: Gain and Efficiency Enhancement of mm-Wave On-Chip Antennas Through Artificial Magnetic Conductors
Atif Shamim
KAUST (Saudi Arabia)
This talk describes AMC design steps in an on-chip environment and shows how it can be used to boost AoC radiation performance. Further, it also shows innovative techniques for AMC thickness reduction to make it more suitable with the traditional CMOS stack-ups.
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18:00: THz Corrugated Horn Antennas as TEM Mode-Convertor for Power Measurement and Material Characterization in Free-Space
Alireza Kazemipour, Johannes Hoffmann, Michael Wollensack, Daniel Stalder, Juerg Ruefenacht, Markus Zeier
Federal Institute of Metrology (METAS) (Switzerland)
In-waveguide measurements are usually challenging at THz frequencies because of dimensional restrictions. Corrugated horn antenna is studied to show its capabilities (and limits) as WG to free-space mode convertor. Results are presented in terms of energy transfer to an open-surface detector and TEM propagation mode on-and-near the antenna aperture. This paper shows the feasibility of using such antennas in 75-110GHz and 500-750GHz bands for power measurement and material characterization with the estimation of systematic and random errors.
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