Approximate calculation of scattered field from three-dimensional narrow cracks

Xianyang Zhu, Jian Ming Jin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The calculation of electromagnetic scattering from electrically large targets without small features can be accomplished efficiently and accurately due to the development of asymptotic techniques and high-speed computers. Several software packages are now available to compute the radar cross section (RCS) almost in real time. However, the asymptotic techniques alone cannot simulate the effect of small features, such as cracks and bumps, often found on realistic targets. These small features can have significant contributions to RCS, which is particularly true for low observable targets. Such problems can be coped with using hybrid techniques. Although the hybrid techniques are quite accurate, they still require the numerical characterization of small features using a numerical method such as the finite element method (FEM) and the method of moments (MoM). In applications where a very high accuracy is unnecessary, one can develop an approximate method to greatly simplify the characterization of small features and reduce the computing time to a negligible amount. One successful example is the development of the incremental length diffraction coefficients (ILDC) for semi-cylindrical channel and bosses. We present an approximate and efficient formulation for calculating the scattered field from a 3-D narrow crack.

Original languageEnglish (US)
Title of host publicationIEEE Antennas and Propagation Society International Symposium
Subtitle of host publicationWireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2846-2849
Number of pages4
ISBN (Electronic)078035639X, 9780780356399
DOIs
StatePublished - Jan 1 1999
Event1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 - Orlando, United States
Duration: Jul 11 1999Jul 16 1999

Publication series

NameIEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
Volume4

Other

Other1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999
CountryUnited States
CityOrlando
Period7/11/997/16/99

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Radiation

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