Study of impedance and radiation properties of a concentric microstrip triangular-ring antenna and its modeling techniques using FDTD method

A concentric microstrip triangular-ring antenna structure using the log-periodic principle for increasing the impedance bandwidth of the microstrip patch antenna is described. The finite-difference time-domain (FDTD) method is applied to analyze the proposed structure. A special technique to model t...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1998-04, Vol.46 (4), p.531-537
Main Authors: Misra, I.S., Chowdhury, S.K.
Format: Article
Language:English
Subjects:
Antenna measurements
Approximation algorithms
Bandwidth
Electromagnetic measurements
Feeds
Finite difference methods
Impedance measurement
Microstrip antennas
Patch antennas
Time domain analysis
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Description
Summary:A concentric microstrip triangular-ring antenna structure using the log-periodic principle for increasing the impedance bandwidth of the microstrip patch antenna is described. The finite-difference time-domain (FDTD) method is applied to analyze the proposed structure. A special technique to model the slanted metallic boundaries of the triangular ring has been used in the general FDTD algorithm to avoid the staircase approximation. The method improves the accuracy of the original FDTD algorithm without increasing the complexity. The radiation patterns at different frequencies over a wide bandwidth are obtained experimentally.
ISSN:0018-926X
1558-2221
DOI:10.1109/8.664117