Mu-near-zero metasurface for microstrip-fed slot antennas

被引:0
|
作者
Sarawuth Chaimool
Chawalit Rakluea
Prayoot Akkaraekthalin
机构
[1] King Mongkut’s University of Technology North Bangkok,Wireless Communication Research Group (WCRG), Electrical and Computer Engineering, Faculty of Engineering
[2] Rajamangala University of Technology Thanyaburi,Department of Electronic and Telecommunication, Faculty of Engineering
来源
Applied Physics A | 2013年 / 112卷
关键词
Radiation Pattern; Microstrip Line; Embed Line; Impedance Bandwidth; Slot Antenna;
D O I
暂无
中图分类号
学科分类号
摘要
A mu-near-zero metasurface as a superstrate consisting of a periodically square closed ring is proposed for gain and bandwidth enhancement of microstrip-fed slot antennas (MFSAs). The metasurface exhibits near-zero permeability (0<μ<1) and negative reflection phase. For a unidirectional radiation pattern, the metasurface above the MFSA is employed to reduce the back-lobe radiation (180∘) and enhance the gain at 0∘ without a metallic reflector. Interestingly, if additional metasurfaces are placed on both sides of the MFSA, a low-profile, high-gain and wide-band bidirectional antenna can be obtained. The results indicate that the metasurface can also enhance the radiation characteristics, impedance bandwidth and efficiency. Both simulation and measurement of the proposed antennas with metasurface show a fractional bandwidth of 25 % and the overall thicknesses of λ0/12 and λ0/6 of uni- and bidirectional antennas, respectively.
引用
收藏
页码:669 / 675
页数:6
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