An Improved Discrete Complex Image Method Based on a Special Sampling Path

Author

Da Qing Liu ; Peng Zhao ; Chi Hou Chan

Author_Institution

State Key Lab. of Millimeter Waves, City Univ. of Hong Kong, Hong Kong, China

Volume

62

Issue

7

fYear

2014

fDate

41821

Firstpage

3858

Lastpage

3864

Abstract

A special sampling path is proposed to improve the accuracy of the discrete complex image method (DCIM) in evaluating the lateral wave. Different from all the previous DCIM implementations, the proposed sampling path goes through the branch point directly, which helps to evaluate its contribution to the lateral wave more accurately. In this communication, different sampling paths of DCIM have been implemented and compared. It is found that in the situations where the lateral wave dominates the far-field region, DCIM with the new path gives more accurate and stable results.

Keywords

Green´s function methods; electromagnetic wave scattering; electromagnetic waves; integration; method of moments; signal sampling; DCIM; fast all-modes method; improved discrete complex image method; lateral wave evaluation; method-of-moment; numerical integration method; numerical modified steepest descent path; spatial-domain Green´s function; special sampling path; Accuracy; Fitting; Least squares approximations; Silicon; Spectral analysis; Surface waves; Branch point; Green´s function; discrete complex images method (DCIM); layered media; sampling path;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2014.2319860

Filename

6805166