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Poster session I
Wideband Printed Planar Monopole Antenna Element for Wearable Application
Pedro Falcão, Custodio Peixeiro
University of Lisbon (Portugal)
The implementation of a wideband printed monopole antenna near a metallic shield is presented. A wearable antenna system application to probe the electromagnetic field, with frequency in the range 0.7-3.5 GHz (5:1 bandwidth), incident on a professional user is envisaged. A lossy foam layer is used between the shield and the antenna to absorb the shield reflection and avoid narrowing the bandwidth.
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Electromagnetic modelling of Leaf Water Potential under Ultra-Wide Band Microwaves Sensing
Youness Zaarour (1), Fatima Zahrae El Arroud (1), Rafiq El Alami (1), Hafid Griguer (1), M'Hamed Drissi (2)
(1)Mohammed VI Polytechnic University (Morocco), (2)INSA Rennes (France)
Noninvasive sensor of plant that measure leaf concentration water is purposed. It is based on a microstrip structure where the loaded layer is represented by a mathematical model. The leaf is represented with the cellulose Cole-Debye model, that includes freshwater molecules which are simulated with different size to characterize the turgescence and plasmolysis behavior. The concept is validated and compared to Cole-Debye model for different situation of stress leaf, represented by an equivalent dielectric cell over the sensor.
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All-optical terahertz modulation with an epsilon near-zero material
Eduardo Alvear-Cabezon (1), Emmanuel Centeno (1), Rafik Smaali (1), Fernando Gonzalez-Posada (2), Stephane Blin (2), Thierry Taliercio (2)
(1)Université Clermont Auvergne (France), (2)Montpellier University (France)
We theoretically and experimentally study the THz electromagnetic properties of an undoped-InAs slab whose permittivity is optically modified by a photo-generation process. We show a high modulation of the THz transmission up to 90% from 0.75 to 10 THz at very low pump fluence in the continuous wave regime. We also demonstrate a high-speed transmission modulation rate up to 2 MHz range with a modulated pump.
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On the propagation of surface plasmon polaritons at the interface of low-dimensional acoustic metamaterials
online, live
Tatjana Gric (1), Edik Rafailov (2)
(1)Vilnius Tech (Lithuania), (2)Aston University (United Kingdom)
Acoustic metamaterials and phononic crystals possess a wide variety of exceptional physical features. Dispersion properties of surface waves propagating at the interface between a nanocomposite made of a semiconductor inclusions systematically distributed in a transparent matrix and low-dimensional acoustic metamaterial, constructed by an array of nanowires implanted in a host material are investigated. We observed propagation of surface plasmon polaritons. It is demonstrated that one may dramatically modify properties of the system by tuning the geometry of inclusions.
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Separated Microstrip Antenna for Satellite Simulators
online, live
Shahin Salarian, Dariush Mirshekar
University of Essex (United Kingdom)
Microstrip patch antenna have been designed for satellite simulator system for transceiver antenna. The transmitter antenna is designed for the uplink at 14.25 GHz and receiver antenna is designed for the downlink at 11.45 GHz. The transmitter and receiver antennas are designed on a single substrate with microstrip transmission feedline on two sides for each frequency band. Simulation results reveal a broadband structure for reflection, with a gain of 7 dB and high efficiency.
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