Effects of dielectrics and internal resonances on modal analysis of terminal chassis

Zachary T. Miers, Buon Kiong Lau

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

1 Citation (SciVal)
126 Downloads (Pure)


The symmetric PMCHWT method of moments (MoM) impedance matrix allows for the characteristic modes (CMs) of a structure containing dielectric to be found. Recently, this impedance matrix was proven to provide non-real solutions which can be attributed to the MoM internal resonance problem. These internal resonances can be removed through different CM post-processing techniques. However, these studies focus on dielectric structures, whereas the majority of antennas utilize electric conductors as the radiators. As such, dielectrics are often neglected to simplify the CM analysis and hence the problem of internal resonance is overlooked. This work explores the extent of the internal resonance problem in mixed conductor-dielectric structures. The results reveal that the problem is severe even when the structures only contain small amounts of dielectric materials. Moreover, the significant impact of dielectrics on CMs reveals that dielectrics should be included in CM analysis to ensure high accuracy.
Original languageEnglish
Title of host publication2016 10th European Conference on Antennas and Propagation, EuCAP 2016
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)9788890701863
Publication statusPublished - 2016 May 31
Event10th European Conference on Antennas and Propagation, 2016 - Davos, Switzerland
Duration: 2016 Apr 102016 Apr 15


Conference10th European Conference on Antennas and Propagation, 2016
Abbreviated titleEuCAP

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering


  • dielectric material
  • method of moments
  • terminal antennas
  • Theory of Characteristic Modes


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