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1

Ka Band-pass Filter Based on SIW Technology for Wireless Communications

Damou Mehdi, Benallou Yassine, Chetioui Mohammed, Boudkhil Abdelhakim, Berber Redouane

Journal of Telecommunications and Information Technology

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2021

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nr 2

49--56

EN

The paper proposes a new third-order Chebyshev bandpass filter based on the substrate integrated waveguide (SIW) manufacturing technology using an inductive iris and a defected ground structure (DGS) station to resonate in the Ka frequency band, intended for wireless communication applications. All steps that are necessary for designing such a filter have been described in detail based on specific analytical equations harnessed to calculate the different synthesizable parameters of the proposed band-pass filter design, such as the coupling matrix, quality coefficients and initial geometric dimensions. The filter’s ideal frequency response is extracted from an equivalent circuit employing localized elements developed with the use of Design Microwave Office Software. Otherwise, HFSS is employed to set the initial parameters of the proposed topology that will not meet the target specifications defined previously. Accordingly, optimization procedures are necessary for different SIW band-pass filter parameters to reach a high frequency response for the proposed design. The detailed results presented show high efficiency of the SIW technology that offers good performance with lower filter volumes. Two topologies have been developed and then optimized to demonstrate the usefulness of EM software.

2

Macierzowa metoda planowania przedsięwzięć technicznych w budowie maszyn

Kielec R., Sąsiadek M.

Technologia i Automatyzacja Montażu

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2018

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nr 2

6--10

PL

W pracy przedstawiono metodę macierzową do planowania nowatorskich przedsięwzięć w MSP. Przedstawiono oryginalny, zaczerpnięty z przemysłu przebieg procesu planowania, projektowania i wytwarzania modułu obudowy frezarki, pod branżową nazwą Kabina M10, od momentu wpłynięcia zapytania od klienta po wysyłkę gotowego produktu. W analizowanym przedsiębiorstwie planowanie produkcji realizowane było przy pomocy tradycyjnych metod graficznych takich jak PERT lub GANTT. Autorzy pracy zaproponowali do rozwiązania problemu planowania nowych przedsięwzięć innowacyjną metodę bazującą na kwadratowej macierzy zależności. Do automatyzacji procesu optymalizacji przebiegu procesu projektowania i wytwarzania wykorzystali autorski program Mag Project, w którym to zaimplementowano własne opracowanie Algorytmu Genetycznego. Do analizy realizacji zadań w macierzy wykorzystano ideologię inżynierii współbieżnej oraz przedstawiono zalety jej stosowania. Po zapoznaniu się z funkcjonowaniem firmy opracowano dla omawianego modułowego produktu nowy proces planowania produkcji. Nową procedurę realizacji Kabiny M10 przedstawiono w formie zoptymalizowanej macierzy sprzężeń.

EN

The paper presents a matrix method for planning of the innovative ventures in the SMEs sector. The article presents the original process of designing and manufacturing the milling enclosure module taken from the industry, under the trade name of the ‘M10 cabin’, from the moment of receiving the inquiry from the customer to the shipment of the finished product. In the analyzed company, production planning was implemented by use of traditional graphic methods such as PERT or GANTT. The authors of the work proposed an innovative method based on a quadratic dependence matrix to solve the problem of planning new ventures. For the automation of the optimization process of the design and production processes, the proprietary program Mag Project was used, in which the own development of the Genetic Algorithm was implemented. The ideology of concurrent engineering and the advantages of its application were used to analyze the implementation of tasks in the matrix. After becoming familiar with the company’s operation, a new production planning process was developed for this modular product. The new ‘M10’ booth implementation procedure is presented in the form of an optimized coupling matrix.

3

Design and Optimization of Rectangular Waveguide Filter based on Direct Coupled Resonators

Damou M., Nouri K., Feham M., Chetioui M.

International Journal of Electronics and Telecommunications

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2017

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Vol. 63, No. 4

375--380

EN

The waveguide filter structure is treated by two softwares (HFSS (High Frequency Structure Simulator) and CST (Computer Simulation Technology)). Numerical example is given in this article to demonstrate, step by step, the application of the approach to the design of resonator, direct coupled waveguide and microstrip filters based on electromagnetic (EM) simulations. For this design procedure, the filter structure is simulated by successively adding one resonator at a time. To continue the work illustrates how to design a fourth order coupled resonator based rectangular waveguide circuit in the traditional way. With a large number of variables, such tuning work consumes a lot of time and the convergence of the final result is not guaranteed. A fourth order X-band bandpass filter with a center frequency of 11 GHz and a fractional bandwidth FBW = 0,0273 is designed using this procedure and presented here as an example. The simulated results by CST are presented and compared withthe results simulated by a high-frequency structure simulator. Good agreement between the simulated HFSSand simulated results by CST is observed.

4

Sound power radiated from rectangular plates

Zou D., Crocker M. J.

Archives of Acoustics

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2009

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Vol. 34, No. 1

25-39

EN

An equation for calculating the sound power radiated from a rectangular plate with arbitrary boundary conditions is derived, in which the sound power radiated from the plate is represented in terms of the normal velocity distribution on the plate and a coupling matrix. The velocity distribution on the plate is expressed in terms of the modal amplitudes and normal modes. The coupling matrix for arbitrary boundary conditions is developed mathematically using the Rayleigh integral. Finally, an approach to compute the radiation efficiency for modes of vibration is presented and the radiation efficiency of the first four most efficient vibration modes for six different boundary conditions is presented.

5

Electromagnetic modelling of 3D periodic structure containing magnetized or polarized ellipsoids

Koledintseva M. Y.

Opto-Electronics Review

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2006

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Vol. 14, No. 3

253-262

EN

Coupling matrix and coupling coefficient concepts are applied to the interaction of an incident plane wave with a regular array of small magnetized or polarized ellipsoids, placed in a homogeneous surrounding medium. In general case, the angle of incidence and polarization of the plane wave upon an array of ellipsoids can be arbitrary. In this model, it is assumed that all the ellipsoids are the same, and the direction of their magnetization is also the same. The direction of magnetization is arbitrary with respect to the direction of the propagation of the incident wave and to the boundary plane between the first medium, where the incident wave comes from, and the array material under study. Any magnetized or polarized ellipsoid is represented as a system of three orthogonal elementary magnetic radiators (EMR) and/or three orthogonal elementary electric radiators (EER). Mutual interactions of individual radiators in the array through the incident plane wave and corresponding scattered electromagnetic fields are taken into account. The electrodynamic characteristics - reflection from the surface of the semi-infinite array (in particular, containing uniaxial hexagonal ferrite resonators), transmission through the array, and absorption are analyzed.