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Title: Circularly-polarized wide slot antenna loaded with a parasitic patch
Authors: Row, Jeen-Sheen;Wu, Shiao-Wen
Contributors: 電機工程學系
Date: 2008-09
Issue Date: 2012-06-05T02:01:10Z
Publisher: IEEE
Abstract: Adesign is described of a broadband circularly-polarized
(CP) slot antenna. A conventional annular-ring slot antenna is first analyzed, and it is found that two adjacent CP modes can
be simultaneously excited through the proximity coupling of an L-shaped feed line. By tuning the dimensions of this L-shaped feed
line, the two CP modes can be coupled together and a broad CP bandwidth is thus formed. The design method is also valid when the
inner circular patch of the annular-ring slot antenna is vertically raised from the ground plane. In this case, the original band-limited
ring slot antenna is converted into a wide-band structure that is composed of a circular wide slot and a parasitic patch, and consequently
the CP bandwidth is further enhanced. For the patchloaded wide slot antenna, its key parameters are investigated to show how to couple the two CP modes and achieve impedance matching. The effects of the distance between the parasitic patch and wide slot on the CP bandwidth and antenna gain are also presented and discussed in details.
Relation: IEEE Trans Antennas Propagat, 56(9): 2826-2832
Appears in Collections:[電機工程學系] 期刊論文

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