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Zdjęcie profilowe: dr hab. inż. Adrian Bekasiewicz

dr hab. inż. Adrian Bekasiewicz

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wszystkich: 174

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Rok 2014
  • Low-Cost Multi-Objective Optimization Yagi-Uda Antenna in Multi-Dimensional Parameter Space
    Publikacja

    - Rok 2014

    A surrogate-based technique for fast multi-objective optimization of a multi-parameter planar Yagi-Uda antenna structure is presented. The proposed method utilizes response surface approximation (RSA) models constructed using training samples obtained from evaluation of the low-fidelity antenna model. Utilization of the RSA models allowsfor fast determination of the best possible trade-offs between conflicting objectives in multi-objective...

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  • Nested Space Mapping Technique for Design and Optimization of Complex Microwave Structures with Enhanced Functionality
    Publikacja

    - Rok 2014

    In this work, we discuss a robust simulation-driven methodology for rapid and reliable design of complex microwave/RF circuits with enhanced functionality. Our approach exploits nested space mapping (NSM) technology, which is dedicated to expedite simulation-driven design optimization of computationally demanding microwave structures with complex topologies. The enhanced func-tionality of the developed circuits is achieved by means...

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  • Nested Space Mapping Technology for Expedite EM-driven Design of Compact RF/microwave Components
    Publikacja

    - Procedia Computer Science - Rok 2014

    A robust simulation-driven methodology for rapid and reliable design of RF/microwave circuits comprising compact microstrip resonant cells (CMRCs) is presented. We introduce a nested space mapping (NSM) technology, in which the inner space mapping layer is utilized to improve the generalization capabilities of the equivalent circuit model corresponding to a constitutive element of the circuit under consideration. The outer layer...

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  • Novel Structure and EM-Driven Design of Small UWB Monopole Antenna
    Publikacja

    - Rok 2014

    A novel structure of a small UWB monopole antenna is presented. In our approach, a compact size is achieved by means of a meander line for current path enlargement as well as the two parameterized slits that introduce additional degrees of freedom helping to ensure good impedance matching. The antenna design is carried out using surrogate-based optimization involving variable-fidelity EM simulations. This allows us to simultaneously...

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  • Rapid EM-Driven Design of Compact RF Circuits By Means of Nested Space Mapping
    Publikacja

    - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Rok 2014

    A methodology for rapid design of RF circuits constituted by compact microstrip resonant-cells (CMRCs) is presented. Our approach exploits nested space mapping (NSM) technology, where the inner SM layer is used to correct the equivalent circuit model at the CMRC level, whereas the outer layer enhances the coarse model of the entire structure under design. We demonstrate that NSM dramatically improves performance of surrogate-based...

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  • Small Antenna Design Using Surrogate-Based Optimization
    Publikacja

    - Rok 2014

    In this work, design of small antennas using efficient numerical optimization is investigated. We exploit variable-fidelity electromagnetic (EM) simulations and the adaptively adjusted design specifications (AADS) technique. Combination of these methods allows us to simultaneously adjust multiple geometry parameters of the antenna structure of interest in a computationally feasible manner, leading to substantial reduction of the...

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  • Trawl-Door Shape Optimization with 3D CFD Models and Local Surrogates
    Publikacja

    - Rok 2014

    Design and optimization of trawl-doors are key factors in minimizing the fuel consumption of fishing vessels. This paper discusses optimization of the trawl-door shapes using high-fidelity 3D computational fluid dynamic (CFD) models. The accurate 3D CFD models are computationally expensive and, therefore, the direct use of traditional optimization algorithms, which often require a large number of evaluations, may be prohibitive....

Rok 2013
  • A CMRC-based compact rat-race coupler with harmonic suppression
    Publikacja

    - Rok 2013

    In this paper, an eective miniaturization technique exploiting compact microstrip resonant cells has been discussed and experimentally validated on the basis of a 3-dB microstrip rat-race coupler. The application of the method proposed has resulted in 91 % circuit area reduction in comparison to a conventional rat-race coupler. Experimental results show good agreement with theoretical characteristics, as well as an additional eect,...

Rok 2012
Rok 2011

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