Design of multilayered cylindrical shields using a genetic algorithm

The design of infinitely long multilayered cylindrical shields with circular cross-section are considered and a method based on the genetic approach is proposed. An analytical method for the calculation of the shielding effectiveness of a cylindrical shield, consisting of homogeneous layers is presented for the case of an obliquely incident plane wave. By making use of this method, a genetic algorithm is implemented for the design of multilayered cylindrical shields in order to achieve a prespecified shielding effectiveness for a given band of frequencies or a range of angles of incidence.

[1]  W. Prasad Kodali,et al.  Engineering Electromagnetic Compatibility , 2001 .

[2]  Vellar C. Plantz,et al.  Shielding theory and practice , 1988 .

[3]  L. Hasselgren,et al.  Geometrical aspects of magnetic shielding at extremely low frequencies , 1995 .

[4]  Krishna Naishadham,et al.  Shielding effectiveness of conductive polymers , 1992 .

[5]  R. Mittra,et al.  Design of lightweight, broad-band microwave absorbers using genetic algorithms , 1993 .

[6]  Hao Wang,et al.  Introduction to Genetic Algorithms in Electromagnetics , 1995 .

[7]  J. F. Hoburg.  A computational methodology and results for quasistatic multilayered magnetic shielding , 1996 .

[8]  J. F. Hoburg.  Principles of quasistatic magnetic shielding with cylindrical and spherical shields , 1995 .

[9]  T. Wu,et al.  Shielding Properties of Thick Conducting Cylindrical Shells with an Obliquely Incident Plane Wave , 1975, IEEE Transactions on Electromagnetic Compatibility.

[10]  V. Rahmat-Samii,et al.  Genetic algorithms in engineering electromagnetics , 1997 .

[11]  Leonard L. Tsai,et al.  Shielding Properties of Thick Conducting Cylindrical Shells , 1974 .

[12]  W. Chew.  Waves and Fields in Inhomogeneous Media , 1990 .

[13]  Ming-Shing Lin,et al.  Plane-wave shielding characteristics of anisotropic laminated composites , 1993 .

[14]  Cheng-Nan Chiu,et al.  Plane-wave shielding properties of anisotropic laminated composite cylindrical shells , 1995 .

[15]  Samuel Y. Liao,et al.  Microwave Devices and Circuits , 1980 .