INACCURACIES IN NUMERICAL-CALCULATION OF SCATTERING NEAR NATURAL FREQUENCIES OF PENETRABLE OBJECTS

被引：54

作者：

HOWER, GL

OLSEN, RG

EARLS, JD

SCHNEIDER, JB

机构：

[1] School of Electrical Engineering and Computer Science, Washington State University, Pullman

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 1993年 / 41卷 / 07期

关键词：

D O I：

10.1109/8.237632

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Calculated scattering from a nonconducting cylindrical ring shows great variability to small changes in the material or geometric parameters within certain ranges of these parameters. The observations are explained by a resonance phenomenon in which the operating frequency is found to lie close to a complex natural frequency of the scattering object. Note that this resonance is a real, observable effect predicted by analytical solutions and not the ''spurious'' numerical resonances which have been widely discussed and which one wishes to suppress. Attempts have been made to reproduce near resonance scattering results using the method of moments and finite-difference time-domain codes. These have failed despite the use of widely accepted discretization densities. Thus, the existence of such resonances requires additional care when interpreting computed results for scattering from similar nonconducting objects having electric and/or magnetic properties.

引用

页码：982 / 986

页数：5

共 21 条

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