A fast algorithm for electrically small composite objects

Yunhui Chu, Weng Cho Chew

Research output: Contribution to journalConference articlepeer-review


A multi-tree scheme to apply low-frequency multilevel fast multipole algorithm (LF-MLFMA) to electrically small composite objects, is described. An implementation of basis rearrangement is also presented to make the algorithm stable and capable of solving problems with large number of unknowns. For the scalar potential part in impedance matrix, divergence is taken on tree (RWG) basis to represent charges. When number of unknowns increases, the iteration count increases and eventually iterative solver fails to converge. The interactions between single patches are calculated by applying LF-MLFMA with O(N) CPU time and memory usage.

Original languageEnglish (US)
Pages (from-to)3960-3963
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
StatePublished - 2004
Externally publishedYes
EventIEEE Antennas and Propagation Society Symposium 2004 Digest held in Conjunction with: USNC/URSI National Radio Science Meeting - Monterey, CA, United States
Duration: Jun 20 2004Jun 25 2004

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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