Adaptive solution space projection for fast and robust wideband finite-element simulation of microwave components

Shih Hao Lee, Jian Ming Jin

Research output: Contribution to journalArticle


A fast and robust wideband finite element method (FEM) is presented for simulation of various microwave components. Port boundary conditions are derived by means of the eigenfunction expansion and then incorporated into the functional, which is discretized and solved by the high-order FEM. To achieve an efficient and reliable wideband simulation, a multipoint model order reduction technique, called the solution space projection method, is applied. The method requires neither the construction of a port-boundary-condition matrix polynomial, nor the calculation of frequency derivatives of solution vectors in its basic version. Thus, the method not only saves memory, but also can deal with various kinds of boundary conditions that may have arbitrary frequency dependence or are described by a set of discrete vectors over the frequency band.

Original languageEnglish (US)
Article number4266843
Pages (from-to)474-476
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number7
StatePublished - Jul 1 2007



  • Finite element methods (FEMs)
  • Microstrip filters
  • Model order reduction (MOR)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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