Optimal design technique for waveguide device

Author

Kim, Juno ; Lee, Hong-bae ; Jung, Hyun Kyo ; Hahn, Song-Yop ; Cheon, Changyul ; Kim, Hyeongseok

Author_Institution

Dept. of Electr. Eng., Seoul Nat. Univ., South Korea

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1250

Lastpage

1253

Abstract

A modified genetic algorithm, which we call the genetic algorithm coupled with sensitivity analysis (GACS), is proposed in comparison with the genetic algorithm (GA) and the optimization process using the design sensitivity analysis (DSA). The GACS reduces computing time by appending the DSA optimization process to the genetic algorithm. As an example, a waveguide T-junction is designed for the purpose of minimizing the reflected power. As an analysis tool the two dimensional vector finite element method (VFEM), which does not generate spurious solutions having a fatal effect on the optimization process, is used. The reflected power of the T-junction designed by the GACS shows a characteristic of less than -20 dB near 2.2 GHz and the T-junction designed by GA also shows similar characteristics. However the one designed by DSA optimization shows a considerably worse performance than those of the T-junction designed by the GACS or the GA process. The validity of the proposed algorithm is verified through experiment

Keywords

computational complexity; design engineering; genetic algorithms; sensitivity analysis; waveguide discontinuities; waveguide theory; 2.2 GHz; 20 dB; GACS; computing time; design sensitivity analysis; genetic algorithm coupled with sensitivity analysis; modified genetic algorithm; optimal design technique; optimization process; performance; reflected power; two dimensional vector finite element method; waveguide T-junction; waveguide device; Algorithm design and analysis; Design optimization; Electromagnetic waveguides; Finite element methods; Frequency; Genetic algorithms; Magnetic fields; Optimization methods; Process design; Sensitivity analysis; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497471

Filename

497471