Title

A comprehensive study of discontinuities in chirowaveguides

Authors

Authors

T. X. Wu;D. L. Jaggard

Comments

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Abbreviated Journal Title

IEEE Trans. Microw. Theory Tech.

Keywords

chiral material; chirowaveguide; coupled-mode method; discontinuity; CHIRAL MEDIA; WAVE-GUIDES; ELECTROMAGNETIC-WAVES; REFLECTION; SLAB; Engineering, Electrical & Electronic

Abstract

We provide a comprehensive study of two- and three-dimensional discontinuities in chirowaveguides. The multi-mode coupled-mode method is an effective numerical approach to analyze this problem. After obtaining the coupled-mode equations, we diagonalize the coupling matrix to obtain a multimode scattering matrix rather than the usual two-mode approximation. We calculate the scattering properties of coaxial waveguides partially filled with lossy chiral media. Excellent agreement is observed between our results and those obtained by the mode-matching method. We also compare our results in the achiral case for dielectric material partially filled rectangular waveguide with experimental data and results obtained by the mode-matching method. Excellent agreement is again found. Based on our analysis, numerical and analytical results are displayed to provide physical insight into the problem. First, we discuss the effects of the chirality admittance on scattering properties and find that the sensitivity of the scattering parameters to chirality admittance increases as the chirality admittance increases. Second, we find the dielectric constant has a great influence on the scattering parameters. Third, we find the relative influence of height and width of chiral obstacles in rectangular waveguides.

Journal Title

Ieee Transactions on Microwave Theory and Techniques

Volume

50

Issue/Number

10

Publication Date

1-1-2002

Document Type

Article

Language

English

First Page

2320

Last Page

2330

WOS Identifier

WOS:000178433000013

ISSN

0018-9480

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