Uni-dimensional planar almost periodic structures analysis to decompose central arbitrary located source in spectral domain

Hamdi, Bilel; Aguili, Taoufik; Baudrand, H.

doi:10.1109/antem.2012.6262425

Cited by 6 publications

(8 citation statements)

References 10 publications

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“…This section takes up the main expression of the radiation pattern related to the proposed almost periodic planar structures (see figure (1) of the periodic antenna array example) [6][7][8] which is discussed in our previous work [5,9,11]. To resolve this problem, it is claimed that an integral method based on the method of moments combined with the generalized equivalent circuit (MoM-GEC) [6,7,10] is implemented.…”

Section: Problem Formulation: (Radiation Pattern Of the Almost Periodic Structures)mentioning

confidence: 99%

“…At first, the electromagnetic states in electric and current fields of the proposed configuration examples are drawn, that presented at the waveguide aperture. Then, the desired radiation pattern (or the electric far-field) can be computed using the main Fourier expression written and explained in the previous section [6][7][8]14], where the near field distribution that defined on the discontinuity plane is weighted by a numerical MoM-GEC formulation [5,9,11].…”

mentioning

confidence: 99%

“…As a result, the far-field of the given unit structure can be described by the following figure (8) [14,20]. [5,9,11]. In this way, the preceding case of the basic element would be generalized to almost periodic array configuration [6][7][8][9]11].…”

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confidence: 99%

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Radiation Pattern Synthesis of the Coupled Almost Periodic Antenna Arrays Using Artificial Neural Network ANN Model

Hamdi¹,

Aguili²

2022

Preprint

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This paper proposes a radiation pattern synthesis of the almost periodic antenna arrays including mutual coupling effects (that extracted by the Floquet analysis according to our previous work), which principally has a high directivity and large bandwidth. For modeling the given structures, the moment method combined with the Generalized Equivalent Circuit (MoM-GEC) is proposed. The artificial neural network (ANN) as a powerful computational model has been successfully applied to the antenna array pattern synthesis. The results showed that the multilayer feedforward neural networks are rugged and can successfully and efficiently resolve various distinctive complex almost periodic antenna patterns (with different source amplitudes) (in particular, both periodic and randomly aperiodic structures are taken into account). However, the artificial neural network (ANN) is capable of quickly producing the synthesis results using generalization with the early stopping (ES) method. A significant time gain and memory consumption are achieved by using this given method to improve the generalization (called early stopping). To justify this work, several examples are developed and discussed.

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Section: Problem Formulation: (Radiation Pattern Of the Almost Periodic Structures)mentioning

confidence: 99%

mentioning

confidence: 99%

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Radiation Pattern Synthesis of the Coupled Almost Periodic Antenna Arrays Using Artificial Neural Network ANN Model

Hamdi¹,

Aguili²

2022

Preprint

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“…We consider the modal basis functions given by (8), deduced from the Floquet–Bloch theorem as in [18–20]. where , are the Floquet–Bloch states, and are the amplitude of the mode f pq,mn .…”

Section: Theorymentioning

confidence: 99%

Accurate and efficient study of substrate-integrated waveguide devices using iterative wave method

Hajri

Hrizi

Sboui

2015

Int. J. Microw. Wireless Technol.

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This paper proposes an efficient and fast analysis of substrate integrated waveguide (SIW) components using a new approach of the iterative method called WCIP, i.e. “Wave Concept Iterative Process”. This method is based on the iterative resolution of waves between two domains. The first is the spectral domain. We use the Floquet–Bloch decomposition to describe all modes in the spectral domain. The second describes the configuration of the circuit in the spatial domain. It allows taking the exact structure according to the appropriate boundary conditions. This method permits to reduce numerical complexity. The convergence of this approach is always guaranteed. The theoretical suggested study is validated by the simulation of two different examples of SIW circuits. The obtained results are in good agreement with those of measurement and with software HFSS simulations, which prove the advantage of this method.

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“…Examples are the finite element method (FEM), the method of moment (MoM) and finite differences in the time domain method (FDTD) [1,3,28].…”

Section: Introductionmentioning

confidence: 99%

Calculation of the Mutual Coupling Parameters and Their Effects in 1-D Planar Almost Periodic Structures

Hamdi¹,

Aguili²,

Raveu³

et al. 2014

PIER B

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Abstract-This paper proposes a new modal analysis based on Floquet's theorem which is needful for the study of a 1-D periodic phased array antenna excited by arbitrary located sources. This analysis requires an accurate estimation for calculation of the mutual coupling parameters (for example: mutual impedances or admittances . . . ) between the array elements and their effects integrating a large planar radiating structure. Two different formulations are suggested, in spectral and spatial domains, to solve the problem and to calculate the coupling coefficients between the neighbouring elements in a periodic environment. Important gain in the running time and used memory is obtained using Floquet analysis. One numerical method is used for modeling the proposed structures: the moment method combined with Generalized Equivalent Circuit (MoM-GEC).

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Uni-dimensional planar almost periodic structures analysis to decompose central arbitrary located source in spectral domain

Cited by 6 publications

References 10 publications

Radiation Pattern Synthesis of the Coupled Almost Periodic Antenna Arrays Using Artificial Neural Network ANN Model

Radiation Pattern Synthesis of the Coupled Almost Periodic Antenna Arrays Using Artificial Neural Network ANN Model

Accurate and efficient study of substrate-integrated waveguide devices using iterative wave method

Calculation of the Mutual Coupling Parameters and Their Effects in 1-D Planar Almost Periodic Structures

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