An Efficient Numerical Integral in Three-Dimensional Electromagnetic Field Computations

Frank L. Whetten, Kefeng Liu, Constantine Balanis

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


When using the moment method to solve three-dimensional electromagnetic problems with subsectional sinusoid expansion functions and Galerkin's method, an integral in the form of a sinusoid and exponential is often encountered. Since this integral is typically evaluated many times in the course of solving a problem, efficient numerical evaluation of the core integral could lead to a significant reduction of computation time. A new computing algorithm based upon series representation of the integrand is presented which can quickly evaluate this expression. Typical execution time comparisons on several computers are given.

Original languageEnglish (US)
Pages (from-to)1512-1514
Number of pages3
JournalIEEE Transactions on Antennas and Propagation
Issue number9
StatePublished - Sep 1990

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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