Genetic algorithm design for E-plane waveguide filters

Ghorbaninejad, Habib; Ghajar, Ali

doi:10.1007/s11082-016-0743-3

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…By applying Galerkin's method to each one of the integral equations, a matrix system of linear equations is obtained for the unknown expansion coefficient

C_{mn}^{z}

, and

C_{mn}^{x}

. The two linear equations are expressed in matrix form, as following 26

([], \begin{matrix} Z^{xx} & Z^{xz} \\ Z^{zx} & Z^{zz} \end{matrix}) . ([], \begin{matrix} C_{x} \\ C_{z} \end{matrix}) goodbreak= ([], \begin{matrix} U_{x}^{inc} \\ U_{z}^{inc} \end{matrix})

…”

Section: Design Principle and Proceduresmentioning

confidence: 99%

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Genetic algorithm design for nonperiodic planar graphene leaky‐wave antennas in THz

Ghajar

Keshtkar

Jarchi

et al. 2021

Int J RF Microw Comput Aided Eng

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The aim of this paper is proposing a new fast designing method for planar graphene leaky‐wave antennas without periodical changes. Thus, Floquet theory cannot be used for designing, an optimization in numerical EM solver is needed. Since leaky‐wave antennas are electrically long, their simulation using commercial EM simulators needs a large number of meshes, also the optimization of the large number of parameters (slot lengths and their distances) needs huge amount of memory and computation time. To resolve this problem, the method of Moments, implemented in MATLAB, which has been accelerated by applying some techniques, has been used in the design procedure. The antenna comprises a slotted graphene micro ribbon with a specific pattern, which is placed on two dielectric substrates and a PEC reflector. Graphene is used in the proposed LWA, instead of the electric conductor, because of its wonderful properties. The suitable pattern of slots on the graphene microstrip, is obtained using optimization by MATLAB Genetic algorithm tool. The usefulness and performance of the proposed designing approach, is verified in one example. It has been shown that the presented antenna, compared with one of the new successful similar antennas, has a better gain, radiation efficiency, and a wider range of beam scanning.

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“…By applying Galerkin's method to each one of the integral equations, a matrix system of linear equations is obtained for the unknown expansion coefficient

C_{mn}^{z}

, and

C_{mn}^{x}

. The two linear equations are expressed in matrix form, as following 26

([], \begin{matrix} Z^{xx} & Z^{xz} \\ Z^{zx} & Z^{zz} \end{matrix}) . ([], \begin{matrix} C_{x} \\ C_{z} \end{matrix}) goodbreak= ([], \begin{matrix} U_{x}^{inc} \\ U_{z}^{inc} \end{matrix})

…”

Section: Design Principle and Proceduresmentioning

confidence: 99%

“…Hence the introduced method allows to considerably decrease the computational time. Also, for obtaining basic matrices, it is assumed that there is not any slot on the microstrip 26 …”

Section: Design Principle and Proceduresmentioning

confidence: 99%

Genetic algorithm design for nonperiodic planar graphene leaky‐wave antennas in THz

Ghajar

Keshtkar

Jarchi

et al. 2021

Int J RF Microw Comput Aided Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…These computational requirements are increased when artificial intelligence metaheuristics based on nature-inspired concepts are integrated in these numerical modelling simulations to optimize these devices parameters [19]. As examples, considering bi-dimensional optimizations where devices are designed applying subwavelength lattice optics [20] and photonic band gap structures optimizations [21], [22], as well as for new optical devices design, [23], beam splitters [24], optical power couplers [24], [25], [26], waveguide filters [27] and optical circuit designed by plasmonic nano rods [28] are some of these recent applications.…”

Section: Introductionmentioning

confidence: 99%