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Antenna theory and design
08:30 Invited talk: Advances in the theory of Characteristic Modes
Miguel Ferrando-Bataller, Marta Cabedo-Fabrés, Eva Antonino-Daviu
Universitat Politecnica de Valencia (Spain)
The Characteristic Mode Theory was developed by Professor Roger F. Harrington and his collaborators, relating currents in the radiating structure to the associated modal fields. It has been extensively developed following the paper published by the authors of this communication, revisiting the theory and applying it to the analysis of planar antennas. The latest advances in cubesat, planar lens structures, antennas for MIMO applications for 5G applications and metamaterials are presented.
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08:50: A New Microstrip Sierpinski Carpet Antenna Using a Circular Pattern With Improved Performance
Abdelhakim Moutaouakil (1), Younes Jabrane (1), Abdelati Reha (2), Abdelaziz Koumina (1)
(1)Cadi Ayyad University (Morocco) , (2)Laboratoire d'Innovation en Management et en Ingénierie pour l'Entreprise (Morocco)
In this work, we present the two first iterations design of the Sierpinski carpet fractal antenna by using a circular pattern. The proposed antenna is printed on FR4 substrate with a dielectric constant of 4.4. At the second iteration, the studied antenna has a multiband behavior with four resonant frequencies with a good impedance matching. The simulated results performed by CADFEKO a Method of Moments (MoM) based Solver and measurement using Vector Network Analyzer are in good agreement.
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09:05: Engineering Highly Directive Optical Waveguide Antennas
Henna Farheen (1), Lok-Yee Yan (2), Till Leuteritz (2), Siqi Qiao (2), Florian Spreyer (1), Christian Schlickriede (1), Viktor Quiring (1), Christof Eigner (1), Thomas Zentgraf (1), Stefan Linden (2), Jens Forstner (1), Viktor Myroshnychenko (1)
(1)Paderborn University (Germany) , (2)Universität Bonn (Germany)
We show the numerical and experimental realization of broadband optical traveling-wave antennas made from low-loss dielectric materials which exhibit highly directive patterns. The high directivity is a result of the interplay between two dominant TE- and leaky-modes present in the antenna director. These antennas possess near unity radiation efficiency at the operational wavelength of 780nm, maintaining a broad bandwidth. We envision that our all-dielectric approach demonstrates a new class of antennas that are excellent candidates for optical-communication and sensing.
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