Title :
Characteristics of guided and leaky waves on multilayer thin-film structures with planar material gratings
Author :
Yang, Hung Yu David
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Illinois Univ., Chicago, IL, USA
fDate :
3/1/1997 12:00:00 AM
Abstract :
This paper presents the characteristics of guided (surface) waves and leaky waves on multilayer structures with planar implanted periodic dielectric blocks. A three-dimensional (3-D) integral-equation formulation in conjunction with the method of moments (MoM´s) is used to find the propagation constants of the surface-wave and leaky-wave modes. The analysis deals with layered structures with irregular implants. Photonic band-gaps of both guided waves and leaky waves for rectangular air-implants are identified. Anisotropic properties of the surface waves and leaky waves are investigated. The design of leaky-wave antennas with the information of mode characteristics is discussed. The analysis is validated through the comparison with a low-frequency effective-medium approach and results for linear gratings
Keywords :
dielectric thin films; electromagnetic wave propagation; integral equations; method of moments; photonic band gap; surface electromagnetic waves; waveguide theory; anisotropy; guided surface wave; leaky wave; leaky-wave antenna; method of moments; multilayer thin-film structure; photonic band-gap; planar implanted periodic dielectric block; planar material grating; propagation constant; rectangular air-implant; three-dimensional integral equation; Anisotropic magnetoresistance; Dielectric thin films; Implants; Moment methods; Nonhomogeneous media; Periodic structures; Photonic band gap; Propagation constant; Surface waves; Transistors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
