Singular hierarchical curl-conforming vector bases for triangular cells

Roberto D. Graglia, Andrew F. Peterson, Ladislau Matekovits, Paolo Petrini

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A new family of hierarchical vector basis functions is proposed that accurately models fields near corners. These are additive functions that combine singular bases incorporating general exponents with a full set of existing hierarchical polynomial basis functions to form the representation. The functions are described for triangular cells, and several results are provided to illustrate the improvement in accuracy resulting from their use. A simple method for numerically constructing the singular basis functions 'on the fly' is also provided. The numerical construction of these singular basis functions facilitates their use for modeling fields near corners made of penetrable material.

Original languageEnglish
Article number6799242
Pages (from-to)3632-3644
Number of pages13
JournalIEEE Transactions on Antennas and Propagation
Volume62
Issue number7
DOIs
Publication statusPublished - Jul 2014

Keywords

  • Basis functions
  • finite element methods
  • hierarchical basis functions
  • singular basis functions
  • waveguides
  • wedges

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