Search

Your search keyword '"Liu, Qin S."' showing total 29 results
Start Over Author "Liu, Qin S."
29 results on '"Liu, Qin S."'

1. Combined Field Integral Equation Based Theory of Characteristic Mode

Author

Dai, Qi I., Liu, Qin S., Gan, Hui, and Chew, Weng Cho

Subjects
Mathematical Physics
Abstract

Conventional electric field integral equation based theory is susceptible to the spurious internal resonance problem when the characteristic modes of closed perfectly conducting objects are computed iteratively. In this paper, we present a combined field integral equation based theory to remove the difficulty of internal resonances in characteristic mode analysis. The electric and magnetic field integral operators are shown to share a common set of non-trivial characteristic pairs (values and modes), leading to a generalized eigenvalue problem which is immune to the internal resonance corruption. Numerical results are presented to validate the proposed formulation. This work may offer efficient solutions to characteristic mode analysis which involves electrically large closed surfaces.

Published
2015
Full Text
View/download PDF

6. Study of generalized formulation for augmented electric field integral equation with perturbation method.

Author

Chen, Wenjing, Sun, Sheng, Liu, Yang G., Liu, Qin S., Chen, Yongpin, and Hu, Jun

Subjects
ELECTRIC field integral equations, PERTURBATION theory, TAYLOR'S series, SCATTERING (Physics), PLANE wavefronts
Abstract

In this work, a generalized form for the augmented electric field integral equation with perturbation method is studied. By implementing Taylor expansion on all the frequency‐dependent matrix terms and the unknowns, the current coefficients on each frequency order can be obtained in the perturbation method, where the accuracy can be guaranteed near the zero frequency or within the static frequency region. When the frequency goes higher, more expanding terms are required to obtain the accurate results. In order to obtain a wideband solution, a general formulation for the perturbation method is derived and analyzed for the first time. As a result, the improved method can be further extended to dynamic region. Numerical results show that the achieved results for both capacitive circuit problems and plane wave scattering problems are more accurate in comparison with those obtained from the traditional solutions, where the number of the required expanding terms can be determined according to the corresponding error analysis. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results