Search results for: RETRODIRECTIVE ARRAYS - Bridge of Knowledge

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Search results for: RETRODIRECTIVE ARRAYS
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Search results for: RETRODIRECTIVE ARRAYS

  • Millimeter Wave Retrodirective Van Atta Arrays in LTCC Technology

    Publication

    The millimeter wave Van Atta arrays, intended for chipless RFID applications and fabricated in LTCC technology, are presented in this paper. The arrays are designed for 24 GHz and 60 GHz bands. The method for an easy modification of the RCS characteristic by increasing the number of single-dimensional arrays, intended for increasing the RCS level, is also presented. The LTCC manufacturing process is described in detail. The fabricated...

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  • Array

    Journals

    eISSN: 2590-0056

  • Capon-like DoA estimator for rotating arrays

    Publication

    - Year 2019

    We propose a nonparametric superresolution DoA estimator that is suitable for use with rotating arrays. The proposed method can be regarded as an extension of the Capon approach. We investigate its properties using computer simulations and present results obtained by processing of real world data.

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  • ATOMIZATION AND SPRAYS

    Journals

    ISSN: 1044-5110 , eISSN: 1936-2684

  • Pressure distribution and beam pattern of the parametric acoustic arrays.

    Publication

    - Year 2004

    Przedstawiono model matematyczny i wyniki badań teoretycznych zjawiska oddziaływań fal dla źródeł parametrycznych. Model matematyczny zbudowano w oparciu o równanie KZK. Do rozwiązania zagadnienia zastosowano metodę różnic skończonych. Badano zmiany ciśnienia fal wybranych częstotliwości w obrębie wiązki akustycznej oraz charakterystyki kierunkowe dla kołowych źródeł parametrycznych generujących fale różnych częstotliwości.

  • Machine Learning in Multi-Agent Systems using Associative Arrays

    Publication

    - PARALLEL COMPUTING - Year 2018

    In this paper, a new machine learning algorithm for multi-agent systems is introduced. The algorithm is based on associative arrays, thus it becomes less complex and more efficient substitute of artificial neural networks and Bayesian networks, which is confirmed by performance measurements. Implementation of machine learning algorithm in multi-agent system for aided design of selected control systems allowed to improve the performance...

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  • On Radar DoA Estimation and Tilted Rotating Electronically Scanned Arrays

    Publication

    - Year 2020

    We consider DoA estimation in a monopulse radar system employing a tilted rotating array. We investigate the case of nonzero steering angles, in which case the mapping between the target’s azimuth and elevation in the global coordinate system and their counterparts in the array local coordinate system becomes increasingly nonlinear and coupled. Since estimating the azimuth using coherently integrated signals might be difficult because...

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  • Passive sonar with cylindrical array

    Artykuł prezentuje sposób wykorzystania sonaru aktywnego z anteną cylindryczną do nasłuchu pasywnego podwodnych źródeł dźwięku. Wykazano, że wykrycie źródła dźwięku i określenie jego namiaru może być zrealizowane bez zmian konstrukcji odbiornika. Wymagana jest jedynie zmiana algorytmów przetwarzania sygnałów w beamformerze. Wykazano również, że w celu zwiększenia dokładności namiaru można zastosować wysokorozdzielcze metody estymacji...

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  • Multifrequency Wideband Sonar Array

    Publication
    • A. Eliminowicz
    • W. Lis
    • L. Zajączkowski

    - HYDROACOUSTICS - Year 2012

    This paper describes of new approach to Multifrequency Wideband Arrays (MWA),applied piezocomposite technologies of the array elements. MWA operating in transmitting(Tx) and receiving (Rx) mode on two or three bands, requires state-of-the-art technology andefficient array designing than conventional array in which separate arrays for every band oreven separate Tx and Rx transducers/arrays are used. The new piezocomposite elements...

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  • Enhanced photoelectrochemical and photocatalytic performance of iodine-doped titania nanotube arrays

    Publication

    - RSC Advances - Year 2015

    The paper discusses the synthesis and performance of iodine doped titania nanotube arrays exhibited under irradiation. The doping procedure was performed as an additional, electrochemical process carried out after formation of nanotube arrays via anodization of Ti substrate. The optical and structural properties were characterized using Raman, UV-vis, photoluminescence and X-ray photoelectron spectroscopy. The surface morphology...

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