Periodic FDTD Analysis of a 2-D Leaky-Wave Planar Antenna Based on Dipole Frequency Selective Surfaces

A periodic finite-difference time-domain (FDTD) analysis is presented and applied for the first time in the study of a two-dimensional (2D) leaky-wave planar antenna based on dipole frequency selective surfaces (FSSs). First, the effect of certain aspects of the FDTD modeling in the modal analysis o...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2007-07, Vol.55 (7), p.2006-2012
Main Authors: Kosmas, P., Feresidis, A.P., Goussetis, G.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Attenuation
Diffraction
Diffraction, scattering, reflection
Dipole antennas
Dipoles
Dispersion
Dispersions
Exact sciences and technology
Finite difference methods
Finite difference time domain method
Finite-difference time-domain (FDTD)
frequency selective surface (FSS)
Frequency selective surfaces
leaky-wave antenna (LWA)
Mathematical models
Modal analysis
periodic structures
Planar arrays
Radiocommunications
Radiowave propagation
Telecommunications
Telecommunications and information theory
Testing
Time domain analysis
Two dimensional
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Summary:A periodic finite-difference time-domain (FDTD) analysis is presented and applied for the first time in the study of a two-dimensional (2D) leaky-wave planar antenna based on dipole frequency selective surfaces (FSSs). First, the effect of certain aspects of the FDTD modeling in the modal analysis of complex waves is studied in detail. Then, the FDTD model is used for the dispersion analysis of the antenna of interest. The calculated values of the leaky-wave attenuation constants suggest that, for an antenna of this type and moderate length, a significant amount of power reaches the edges of the antenna, and thus diffraction can play an important role. To test the validity of our dispersion analysis, measured radiation patterns of a fabricated prototype are presented and compared with those predicted by a leaky-wave approach based on the periodic FDTD results.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2007.900233