Surface Wave Attenuation in Multilayer Structures With Lossy Media and Impedance Surfaces

Abstract

A methodology for analyzing the attenuation constant of surface wave propagating in general multilayer structures is proposed. The multilayer structure may include any number of layers, that can be made up of lossy dielectric, magnetic-material, and impedance surfaces. The non-linear characteristic equation (transverse resonance equation -TRE) of the multilayer structure is defined by utilizing transmission line (TL) theory. Consequently, the root(s) of the TRE is/are computed which indicates the complex propagation constant of that characteristic equation. The obtained results are validated over the completely shielded waveguide structures where the full wave simulation is possible. The proposed approach is employed to analyze and discuss the propagation and attenuation constant of surface wave modes in several representative examples. The analysis is carried out in the frequency range from 1 to 12 GHz.

Analysis and Design of Microwave Absorbers Combining Surface Wave Attenuation and Reflection Bandwidth Properties

“…The proposed methodology utilizes a well-established theory of equivalent transmission line (Eq-TL) model and transverse resonance method (TRM) [1]. Both concepts are popularly explained in literature [10], [11], [12], [13], [14], [15], [18], [19], [20], [21], [31], [32], [33], [34], [35], [36], [37]. Therefore, we refrain to explain them in detail here.…”

“…In this part, roots are computed by using the 2D-DM. The 2D-DM method was initially introduced in our previous work of [37] and shown efficient in computing the roots with accuracy and rapidity due to its dynamic behavior. However, in this conventional 2D-DM method, the analysis of the roots was limited to multilayered lossy materials and lossless dielectric material coated with thin resistive sheet (but only single layer).…”

“…Real and imaginary parts of complex propagation constant indicate the attenuation and propagation constants of surface wave, respectively. Besides that, an approach, named as twodimensional dynamic method (2D-DM), is presented in [37]. 2D-DM method is quite efficient in computing the surface wave attenuation (SWA) in lossless/lossy multilayered media, and single layer resistive sheet coated over a lossless dielectric layer.…”

Improved Numerical Estimation Method for Surface Wave Attenuation on Metasurfaces

“…[ 1 ] Surface waves can be engineered with great precision and adaptability using MSs, which are often created from subwavelength structures. [ 14–17 ] The control of surface wave attenuation is one of the key difficulties in the design and use of MSs. This control is important for adjusting how electromagnetic fields interact with materials and can be used for many applications, such as directing, filtering, and cloaking.…”

Improved Numerical Estimation Method for Surface Wave Attenuation on Metasurfaces

“…[1] Surface waves can be engineered with great precision and adaptability using MSs, which are often created from subwavelength structures. [14][15][16][17] The control of surface wave attenuation is one of the key difficulties in the design and use of MSs. This control is important for adjusting how electromagnetic fields interact with materials and can be used for many applications, such as directing, filtering, and cloaking.…”