Modal Characteristics of Planar Transmission Lines With Periodical Perturbations: Their Behaviors in Bound, Stopband, and Radiation Regions
Resource
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 1, JANUARY 2005
Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Journal Volume
VOL. 53
Journal Issue
NO. 1
Pages
-
Date Issued
2005-01
Date
2005-01
Author(s)
Chen, Yu-Chiao
Tzuang, Ching-Kuang
Tatsuo, Itoh
Tapan Kumar Sarkar
DOI
246246/200611150121846
Abstract
Abstract—This paper presents the modal characteristics of
one-dimensional periodical transmission lines, including the
microstrip with even-symmetric periodical perturbations, the
microstrip on an electromagnetic bandgap (EBG) surface without
via holes, and the electric-magnetic-electric (EME) microstrip, in
the bound, stopband, and radiation regions. The Brillouin diagram,
or the so-called diagram, is employed to represent the
dispersion characteristics of the periodical transmission lines. The
matrix-pencil method is applied to analysis the surface currents
obtained by invoking the method of moment simulation, and
the results are verified by the finite-element method analyzes. The
complex modes in the form of + and could be
observed in the microstrip with even-symmetric periodical structure
and form the stopband of the periodical microstrip. In the
case study of the microstrip on the EBG surface, the complexity
of the modal behaviors could be illustrated in the stopband. The
complex mode pair in the form of+ exists in the stopband.
In the stopband of the EME microstrip, the complex mode in the
form of+ appears. Energy vanishes due to the space-wave
leakages near the corner frequencies of the stopband of the microstrip
on the EBG ground plane and the EME microstrip. The
dispersion characteristics of three case studies exhibit the different
modal behaviors although the scattering analyzes show the similar
results in the passband, stopband, and radiation regions.
Subjects
Electromagnetic bandgap (EBG)
matrix-pencil
method
method
periodical structure
photonic bandgap (PBG)
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
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