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[天线]53 Two-layer electromagnetically coupled rectangular patch antenna

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0楼发表于: 2008-10-27 23:19:33

Two-layer electromagnetically coupled rectangular patch antenna
R. Q. Lee
NASA Lewis Research Center
Cleveland,OH 44135
K. F. Lee and J. Bobinchak
Department of Electrical Engineering
The University of Akron, Akron, OH 44325
*
IM'RODKTION
The two-layer electromagnetically coupled patch (FMCP) antenna
consisting of a driven patch in the bottom and a parasitic
patch on the top (Fig. 1) has been the subject of several
investigations 11-41 . For circular and equitriangular patches,
' experimental results showed that impedance bandwidth of 10-20%
were obtained, compared to about 2% for a single patch.
ever, there was little attention paid to the variation of pattern
shape, 3 dB beamwidth (and hence the gain) with the spacing beween
the layers, s. In this paper, we report an experimental
study of a rectangular EM3 antenna excited in the 'I'Mol d e .
The major finding is that, depending on the spacing s, the
characteristics of the antenna can be separated into three
regions.
region 2 .& abnormal radiation patterns and region 3 is associated
with MITOW beamwid ..

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