Theoretical Investigation of Resonant Modes of Shorting Post Loaded Circular Microstrip Antenna On Sphere
作者:
A. De,
T. Chakravarty,
期刊:
Journal of Electromagnetic Waves and Applications
(Taylor Available online 2000)
卷期:
Volume 14,
issue 8
页码: 1087-1102
ISSN:0920-5071
年代: 2000
DOI:10.1163/156939300X00996
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In the present work the resonance properties of TM01and TM11modes of a spherical-circular patch antenna are investigated when loaded with single shorting post. The cavity model is used to predict the frequencies of the resonant modes. It is shown that angle of curvature has a significant effect on the tunability of the resonant modes. Beyond a critical angle of curvature the resonant frequency of the post loaded disk on sphere decreases with increasing radial distance of post from the centre of the patch. This is in complete reversal to the trend displayed by a planar circular disk antenna loaded with shorting post. Also demonstrated is the fact that asymmetric post loading leads to generation of three split resonances. Preliminary experiments conducted on such shorted patch antennas, corroborates the theory.
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