Genetic algorithm optimization of a multisectional corrugated conical horn antenna

Abstract

periodic structure. The second (see is that there is very good agreement between the results obtained using the ADI-FDTD method and the conventional FDTD method, but the ADI-FDTD method is faster than the conventional FDTD method because the longer period of time is utilized. The last observation made from Figure 4 is that a nearly perfect reflection is achieved in the frequency range from 250 -350 MHz. CONCLUSIONIn the conventional FDTD method, the maximum time-step size is limited by minimum cell size in the computational domain. Certainly, a small time-step size will lead to a significant increase in calculation time so that the advancement time velocity will be relatively slow. In this paper, the restriction of the time-step size in the conventional FDTD method is removed by employing the ADI technique. For periodic problems such as PBG materials and spiracle cavities, the resonance phenomenon is engendered easily. Therefore, the ADI technique is an effective means for solving these kinds of abovementioned periodic problems. Compared with the conventional FDTD method, the ADI-FDTD method is found to be fast when the same accuracy is kept. As an initial work, we started with the 1D case only, but in the future it can be extended to multidimensional problems.

Optimization of an acoustic horn with respect to efficiency and directivity

“…We use these expressions, substituting the exact solutionp with the numerical solution of Equation (4). This substitution will introduce an error due to the artificial boundary conditions (4b) imposed on out .…”

“…In the literature, there are surprisingly few reports that concern numerical design optimization of systems involving horns. For electromagnetic waves, there are a few recent examples involving design of horns used as antenna feeds [1][2][3][4], and Dobson [5] uses optimization techniques to design a horn-like structure for high-efficiency transfer of optical signals between a dielectric waveguide and the surroundings. Regarding acoustic waves, Noreland's Ph.D. thesis [6] introduces shape optimization ideas to the design of a trumpet flare in order to enhance the playability of the instrument.…”

Polyelectrolyte Templated Polymerization in Langmuir Films: Nanoscopic Control of Polymer Chain Organization

“…Meric 11 carries out the sensitivity analysis for the Helmholtz equation, using, as here, the adjoint‐equation approach applied to a BEM discretization, and reports results of the method applied to a generic shape optimization problem. Turning to design optimization problems for devices exposed to electromagnetic waves, several authors have used numerical design optimization for the design of horn antennas 12–16. A book by Angell and Kirsch 17 addresses mathematical aspects of the antenna design optimization problem.…”

Design Automation of UHF RFID Tag Antenna Design Using a Genetic Algorithm Linked to MWS CST

“…The GA has various types, continuous, binary, hybrid, and pareto GA [5][6][7][8][9][10]. Reference [5] shows the small antenna optimization for Bluetooth and WLAN using the GA, and references [3][4][5][6] introduced many antenna optimization applications using GAs.…”