Multiple operating frequency selections for reconfigurable antenna design by SM based optimisation

Şimşek, Murat; Aoad, Ashrf

doi:10.1049/iet-map.2017.0273

Cited by 9 publications

(8 citation statements)

References 30 publications

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“…A practically important remark is concerning the selection of random samples for yield optimisation step (10). Yield estimation using MC is characterised by certain variance, which means that drawing a new set of random samples for each evaluation of Y s (x; x (i) } will manifest itself as numerical noise.…”

Section: Yield Improvement By Means Of Sequential Approximate Optimismentioning

confidence: 99%

“…However, the bottleneck is the high cost of EM simulations which may translate into the unacceptable computational overhead of the optimisation process. Design speedup can be obtained by using surrogate-assisted approaches involving data-driven models [6][7][8] as well as physicsbased surrogates [9,10], or adjoint sensitivities [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…The vast majority of reported works considers nominal design (e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]), which neglect potential discrepancies between nominal and actual (fabricated) dimensions of the structure as well as no uncertainty regarding, e.g. material parameters of the dielectric substrate.…”

Section: Introductionmentioning

confidence: 99%

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Sequential approximate optimisation for statistical analysis and yield optimisation of circularly polarised antennas

Kozieł

Bekasiewicz

2018

IET Microwaves, Antennas & Propagation

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The study addresses a problem of low‐cost statistical analysis and yield optimisation of circularly polarised (CP) microstrip antennas. For the sake of computational efficiency, auxiliary response surface approximation models are utilised to establish a fast representation of the expensive full‐wave electromagnetic (EM)‐simulation antenna model. The surrogate permits feasible Monte Carlo (MC) analysis using a large number of random samples (necessary to maintain low variance of yield estimation). The sequential approximate optimisation is then utilised to carry out a robust design, where at each iteration, a new surrogate model is established in a relocated domain. The design objectives are set for the in‐band axial ratio and impedance bandwidth. For illustration purposes, a planar CP antenna with two feed line stubs is considered. Accurate yield estimation is obtained at the cost of only a hundred of EM antenna simulations despite a large number of independent geometry parameters. Yield improvement from the initial value of 63.5% at the nominal design to 99% is achieved at the cost of 300 EM analyses. Comparison with conventional MC analysis is also provided demonstrating the accuracy of the presented approach.

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Section: Yield Improvement By Means Of Sequential Approximate Optimismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sequential approximate optimisation for statistical analysis and yield optimisation of circularly polarised antennas

Kozieł

Bekasiewicz

2018

IET Microwaves, Antennas & Propagation

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“…A frequency reconfigurable antenna scheme for wireless communications has been presented in Reference . Electromagnetic compatibility of aperture antennas using electromagnetic bandgap structure and multiple operating frequency selections for reconfigurable antenna design by SM‐based optimization is reported in Reference . An aperture‐coupled frequency‐reconfigurable has been described .…”

Section: Introductionmentioning

confidence: 99%

A compact reconfigurable aperture coupled fed antenna for intelligent transportation system application

Tripathi

Pathak

Parida

2020

Int J RF Microw Comput Aided Eng

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This article presents a novel reconfigurable aperture coupled fed antenna with a defected ground plane for an intelligent transportation system (ITS). The antenna design with aperture coupled feed line. The defected ground plane allows variation in reactance of the proposed antenna around the center frequency and coupling of energy. This antenna is multiband and works at resonant frequencies of 2.45, 5.9, and 24 GHz allowing measurable reconfigurability with the help of PIN diode. From the measurement, one can infer that the bandwidth is 0.8, 1, and 8.5 GHz, and gain obtained are 11.7, 4.04, and 4.4 dBi at 2.45, 5.9, and 24 GHz frequencies, respectively. It is circularly polarized with a broadside radiation pattern. The advantage of this design is that it covers all the three bands allocated by the Federal Communications Commission for ITS and vehicular communication applications. It is an electrically small, low profile antenna and has a simple structure thus gives large bandwidth.

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“…The physics‐based models are considerably less affected by the curse of dimensionality, however, at the expense of generality. Popular techniques include space mapping, as well as response correction techniques . Surrogate‐based optimization may lead to a significant computational speedup provided that the surrogate model is significantly faster than the fine model, and the two models are sufficiently well correlated.…”

Section: Introductionmentioning

confidence: 99%

A novel trust‐region–based algorithm with flexible Jacobian updates for expedited optimization of high‐frequency structures

Pietrenko‐Dabrowska

2019

Int J Numerical Modelling

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Simulation-driven design closure is mandatory in the design of contemporary high-frequency components. It aims at improving the selected performance figures through adjustment of the structure's geometry (and/or material) parameters. The computational cost of this process when employing numerical optimization is often prohibitively high, which is a strong motivation for the development of more efficient methods. This is especially important in the case of complex and multiparameter structures. In the paper, an expedited trustregion-based algorithm for electromagnetic (EM)-driven design optimization of high-frequency structures is proposed. The presented technique involves a flexible sensitivity update scheme depending on the relative design changes with respect to the trust-region size, as well as a direction of the design relocation and its alignment with the coordinate system axes. This allows for performing finite-differentiation-based sensitivity updates less frequently and, consequently, brings considerable computational savings. Numerical results obtained for an ultra-wideband antenna and a microwave coupler demonstrate that the proposed algorithm outperforms the reference procedure in terms of the number of EM simulations necessary to arrive at the optimized solution (around 50%). At the same time, the design quality loss is minor. KEYWORDSantenna design, Broyden update, electromagnetic simulation-driven design, microwave design closure, trust-region framework

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Multiple operating frequency selections for reconfigurable antenna design by SM based optimisation

Cited by 9 publications

References 30 publications

Sequential approximate optimisation for statistical analysis and yield optimisation of circularly polarised antennas

Sequential approximate optimisation for statistical analysis and yield optimisation of circularly polarised antennas

A compact reconfigurable aperture coupled fed antenna for intelligent transportation system application

A novel trust‐region–based algorithm with flexible Jacobian updates for expedited optimization of high‐frequency structures

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