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Poster session III
Single-shot quantitative phase imaging facilitated by a bifunctional metasurface
Einstom Llego Engay, Dewang Huo, Radu Malureanu, Ada-Ioana Bunea, Andrei Lavrinenko
Technical University of Denmark (Denmark)
A bifunctional metasurface was fabricated to facilitate quantitative phase imaging. The silicon-based metasurface is made of elliptical nanopillars and acts as a polarization splitter allowing for the recording of two images, where one is shifted from the other. The two images were then used in an iterative calculation to retrieve the phase information of technical samples like lenses.
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Koch Curve Polar Coordinate Transform for UWB Antenna Applications
Mac Cartier, Rahul Sreekumar, Elisa Pantoja, Mircea R. Stan
University of Virginia (USA)
Fractal antennas allow for the design of Ultrawide-band(UWB) antennas with a reduced footprint, we present anovel technique for generating antenna geometries which extend the Koch snowflake to angles other than 60 degrees.This is achieved by generating a Koch curve of an arbi-trary indentation angle and then circumscribing the curve about the origin. Using our method, we achieve a 36 per-cent footprint area reduction compared to a traditional Koch snowflake antenna with a center frequency of 4.1 GHz.
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A slotted partial ground plane microstrip patch antenna for ultrawide-band applications
Saida Ibnyaich, Samira Chabaa, Layla Wakrim, Abdessalam El Yassini, Moha M'rabet Hassani, Abdelouheb Zeroual
Cadi Ayyad University (Morocco)
A New, compact, slotted partial ground plane, microstrip patch antenna developed for use in Ultrawide-band application is studied in this paper. The antenna has an electrical small dimensions with a good gain, a notable efficiency and a wide impedance bandwidth. Which make this antenna a good candidate for ultawide-band wireless communication, microwave imaging and radar applications as well.
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online, live
Thomas Bonnafont (1), Othmane Benhmammouch (2), Ali Khenchaf (1)
(1)ENSTA Bretagne (France), (2)International University of Casablanca (Morocco)
This paper studies the long-range tropospheric electromagnetic wave propagation over the sea. An asymptotic model based on the parabolic wave equation is considered. This latter is solved using a fast and memory-efficient wavelet-based method. The roughness effects of the sea are introduced through a hybrid approach. Numerical experiments (in X-band) are provided to highlight the advantages of the wavelet-based method in the context of maritime propagation.
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Target DOA Estimation using GLRT and Crosstalk Reduction for MIMO Radar
online, live
Oscar Gomez (1), Florence Nadal (2), Benoit Poussot (2), Pascale Jardin (2), Geneviève Baudoin (2)
(1)PTU Microwave (Luxembourg), (2)Université Gustave Eiffel (France)
Multiple-Input Multiple-Output (MIMO) radars with colocated antennas have been shown to have higher resolution and better accuracy in target localization than standard phased-array radars. However, due to the proximity of the antenna elements, direct coupling between the transmitters and the receivers (crosstalk) may exist and degrade in the narrowband case the performance of some detection techniques, such as the Generalized Likelihood Ratio Test (GLRT) based one. This paper presents a crosstalk reduction technique for MIMO radar.
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MMV 60 GHz Tunable Periodic Filter
online, live
Abdolreza Divsalar, Shahin Salarian, Dariush Mirshekar-Syahkal
University of Essex (United Kingdom)
A novel mm-wave periodic filter structure has been proposed based on a new design approach. The filter performs at 60 GHz with 3.5GHz bandwidth. The structure composed of periodic Microstrip stubs on BL037 Liquid Crystal substrate. Changing the bias voltage of LC provides a tunability from 58.5 to 62 GHz, while maintains the fractional bandwidth around 5%. In addition, the effect of a different LC substrate has been investigated which provides similar behavior with a wider tuning distance.
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