Genetic algorithms in electromagnetics

Johnson, J.M.; Samii, Y. Rahmat

doi:10.1109/aps.1996.549878

Cited by 30 publications

(18 citation statements)

References 6 publications

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“…2) in an effort to maximize the power emitted by the structure in the visible while maximizing its efficiency. We use a hybrid optimization method consisting of a micro-genetic global optimization algorithm [11][12][13][14][15][16][17], coupled to a local optimization algorithm [18,19], to determine the best dimensions for four-layer structures. The genetic algorithm is an iterative optimization procedure which starts with a randomly selected population of potential solutions and evolves toward improved solutions; once the population converges, the local optimization algorithm finds the local optimum.…”

Section: Resultsmentioning

confidence: 99%

Optimized aperiodic broadband visible absorbers

Granier

Lorenzo

You

et al. 2017

J. Opt.

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Abstract:We present optimized aperiodic structures for use as broadband thermal incandescent emitters which are capable of increasing the emittance by nearly a factor of two over the visible wavelength range when compared to bulk tungsten. These aperiodic multilayer structures are designed with alternating layers of tungsten and air or tungsten and silicon carbide on top of a tungsten substrate. We investigate the properties of these structures for use as lightbulb filaments. We find that these structures greatly enhance the emittance over the visible wavelength range, while also increasing the overall efficiency of the bulb and could lead to a decrease in incandescent lightbulb power consumption by nearly 50%.

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Section: Resultsmentioning

confidence: 99%

Optimized aperiodic broadband visible absorbers

Granier

Lorenzo

You

et al. 2017

J. Opt.

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“…It can be used to evaluate radiation and scattering fields of complex structures for which the normal theories and methods are difficult to be applied [4] . Recently, Kerkhoff, et al applied the GA to the design and analysis of monopoles UWB antennas both without and with the notched-band [5−6] .…”

Section: Introductionmentioning

confidence: 99%

Optimization of band-notched UWB antenna using micro-genetic algorithm combined with FDTD

Yang

Sheng

2009

J. Shanghai Univ.(Engl. Ed.)

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The micro-genetic algorithm (MGA) optimization combined with the finite-difference time-domain (FDTD) method is applied to design a band-notched ultra wide-band (UWB) antenna. A U-type slot on a stepped U-type UWB monopole is used to obtain the band-notched characteristic for 5 GHz wireless local area network (WLAN) band. The measured results show that voltage standing wave ration (VSWR) less than 2 covers 3.1-10.6 GHz operating band and VSWR more than 2 is within 5.150-5.825 GHz notched one with the highest value of 5.6. Agreement among the calculated, HFSS simulated and measured results validates the effectiveness of this MGA-FDTD method, which is efficient for UWB antennas design.

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“…For example, in [7,8] tapering window is used to reduce the sidelobe level in UCCA, but reduction in the sidelobe level increases the beamwidth. Recently, search algorithms, such as genetic algorithms (GAs) [9] and Particle Swarm Optimization (PSO) [10], have been used in array pattern synthesis. GA has been used in [11] to optimize the interelement spacing and number of elements in each ring.…”

Section: Introductionmentioning

confidence: 99%

Concentric Circular Antenna Array Synthesis Using Comprehensive Learning Particle Swarm Optimizer

Elsaidy¹,

Dessouky²,

Khamis³

et al. 2012

PIER Letters

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Abstract-Concentric circular antenna array (CCAA) is synthesized to generate pencil beam with minimum side lobe level (SLL). The comprehensive learning particle swarm optimizer (CLPSO) is used for synthesizing a ten-ring CCAA with central element. This Synthesis is done by finding the optimum current excitation weights and interelement spacing of rings. The computational results show that sidelobe level is reduced to −40.5 dB with narrow beamwith about 4.1 • .

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Genetic algorithms in electromagnetics

Cited by 30 publications

References 6 publications

Optimized aperiodic broadband visible absorbers

Optimized aperiodic broadband visible absorbers

Optimization of band-notched UWB antenna using micro-genetic algorithm combined with FDTD

Concentric Circular Antenna Array Synthesis Using Comprehensive Learning Particle Swarm Optimizer

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