An Efficient Approach for Evaluation of Multilayered Media Green's Functions

Date

2021-01-01

Author

ÖZGÜN, ÖZLEM
Li, Chao
Kuzuoğlu, Mustafa
Mittra, Raj

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

166
views

0
downloads

© 2021 IEEE.In this study, a novel approach is presented for efficient evaluation of Sommerfeld integrals arising in spatial-domain Green's functions in planar multilayered media. This approach allows us to tackle the difficulties encountered during the integration of the Sommerfeld integrals, which exhibit highly oscillatory and slowly decaying nature occurring especially at very high frequencies, e.g., at millimeter waves, that are finding increasing use in applications such as 5G and beyond. The oscillatory behavior of the integrand is modeled through an efficient interpolation and extrapolation scheme with a few samples needed to represent the integrand. Since the integrand is represented with a few exponentials, analytical integration can be used to speed up the process. The proposed approach is tested on different Green's functions and a good agreement is obtained.

Subject Keywords

Green's functions, method of moments (MoM), multi-layered media, Sommerfeld integral

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126895165&origin=inward
https://hdl.handle.net/11511/99174

DOI

https://doi.org/10.1109/aps/ursi47566.2021.9704485

Conference Name

2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Efficient Computation of Green's Functions for Multilayer Media in the Context of 5G Applications Mittra, Raj; Özgün, Özlem; Li, Chao; Kuzuoğlu, Mustafa (2021-03-22) This paper presents a novel method for effective computation of Sommerfeld integrals which arise in problems involving antennas or scatterers embedded in planar multilayered media. Sommerfeld integrals that need to be computed in the evaluation of spatial-domain Green's functions are often highly oscillatory and slowly decaying. For this reason, standard numerical integration methods are not efficient for such integrals, especially at millimeter waves. The main motivation of the proposed method is to comput...
An Efficient Numerical Approach for Evaluating Sommerfeld Integrals Arising in the Construction of Green's Functions for Layered Media Özgün, Özlem; Mittra, Raj; Kuzuoğlu, Mustafa (2022-01-01) This paper presents an efficient approach for evaluating the Sommerfeld integrals in the spectral domain, whose integrands typically show an oscillatory and slowly decaying behavior at high frequencies, e.g., in the millimeter wave regime. It is well known that these integrals arise in the representations of the dyadic Green's functions of layered media and efficient computation of these Green's functions is key to rapid CEM modeling of patch antennas and printed circuits designed for 5G appli...
Numerically efficient analysis of slot-lines in multilayer media using closed form Green's functions Dural Ünver, Mevlüde Gülbin; Aksun, MI (1996-05-16) A numerically efficient technique for the analysis of slot-line geometries in multilayer media is presented using closed-form Green's functions in the spatial domain employed in conjunction with the Method of Moments (MoM). The computed equivalent magnetic current distribution on the slot is used to determine the power radiated by the slot and the input impedance. In power calculations, the spatial domain Green's functions are approximated as a power series of radial distance, and the integrals involving th...
Use of computationally efficient method of moments in the optimization of printed antennas Alatan, Lale; Leblebicioğlu, Mehmet Kemal (1999-04-01) Derivation of the closed-form Green's functions and analytical evaluation of the method of moments (MOM) matrix entries have improved the computational efficiency of the significantly in the analysis of printed geometries. With this background in mind, an extension of this efficient numerical technique is to incorporate an optimization algorithm and to assess its potential as a computer-aided design (CAD) tool. Therefore, we have employed the Gradient search and Genetic algorithms, in conjunction with the e...
Investigation of effect of design and operating parameters on acoustophoretic particle separation via 3D device-level simulations Sahin, Mehmet Akif; ÇETİN, BARBAROS; Özer, Mehmet Bülent (Springer Science and Business Media LLC, 2019-12-16) In the present study, a 3D device-level numerical model is implemented via finite element method to assess the effects of design and operating parameters on the separation performance of a microscale acoustofluidic device. Elastodynamic equations together with electromechanical coupling at the piezoelectric actuators for the stress field within the solid parts, Helmholtz equation for the acoustic field within fluid, and Navier-Stokes equations for the fluid flow are coupled for the simulations. Once the zer...

Citation Formats

Ö. ÖZGÜN, C. Li, M. Kuzuoğlu, and R. Mittra, “An Efficient Approach for Evaluation of Multilayered Media Green’s Functions,” presented at the 2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021, Singapore, Singapur, 2021, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126895165&origin=inward.