Radiation properties of multiband circular MSA with half-ring slots
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概要
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copyright(c)2007 IEICE許諾番号：07R130209Novel multiband circular microstrip antennas (C-MSAs) with multiple half-ring slots are presented in this paper. Two antenna-feeding systems, i.e. an embedded L-probe beneath the patch and a coplanar circular arc- shaped probe (T-probe), are used to feed the C-MSA with multiple half-ring slots. The embedded L-probe is used to excite the C-MSA with a double-layer dielectric substrate due to its tremendous performance to provide a wideband impedance matching. The coplanar T-probe is proposed to realize an excellent multiband C-MSA in a single-layer structure. The C-MSA with four half-ring slots fed by the embedded L-probe exhibits satisfactory radiation characteristics. Five frequencies with broadside radiation patterns and gains of at least 5.0 dBi are obtained. It is also confirmed by simulation that resonant frequency and gain can be easily controlled to meet the desired frequency requirements. Moreover, the C-MSA with three half-ring slots fed by the coplanar T-probe presents satisfactory performance over the four observed frequencies with good return losses (-10dB reference). Broadside radiation patterns with acceptable cross-polarization level and gains in the range of 3.0-7.0 dBi are obtained. Couplings between the C-MSA and the coplanar T-probe have an important contribution to obtain good return losses. It can be controlled by adjusting the distance between them and the arc angle of the coplanar T-probe appropriately. Experiments of both types of antenna were conducted to verify the simulation results and good agreements are confirmed. Due to the performances, these two C-MSAs are considered to be an effective model as a multiband planar antenna.
- 社団法人電子情報通信学会の論文
- 2007-09-01
著者
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Kimura Yuichi
Dept. Of Electrical And Electronic Systems Saitama University
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Kimura Yuichi
Saitama Univ. Saitama‐shi Jpn
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CHAYONO Ridho
Saitama University
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HANEISHI Misao
Saitama University
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Chayono Ridho
Dept. Of Electrical And Electronic Systems Saitama University
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Kimura Y
Department Of Electrical And Electronic Systems Saitama University
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Kimura Yuichi
Saitama Univ. Saitama Jpn
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Haneishi Misao
Saitama Univ. Saitama Jpn
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羽石 操
Saitama University
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木村 雄一
Saitama University
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- 書評 Backhouse, R. and P. Fontaine, eds. : The History of the Social Sciences since 1945