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Single‐layer circular polarizer using metamaterial and its application in antenna
Author(s) -
Ma Xiaoliang,
Huang Cheng,
Pu Mingbo,
Hu Chenggang,
Feng Qin,
Luo Xiangang
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26884
Subject(s) - polarizer , optics , metamaterial , axial ratio , microstrip antenna , circular polarization , turnstile antenna , patch antenna , coaxial antenna , microwave , metamaterial antenna , polarization (electrochemistry) , materials science , physics , antenna (radio) , microstrip , engineering , telecommunications , birefringence , chemistry , quantum mechanics
In this letter, we report a new type of circular polarizer using a single‐layer metamaterial. The unit cell is composed of a metallic annular‐ring and an embedded strip. Numerical and experimental results show that the linearly polarized plane wave can be converted to circularly polarized wave with a 3‐dB axial ratio bandwidth of about 17%, which is from 13.25 to 15.7 GHz. The polarizer can also keep good circular polarization with incident off‐normal angle in the range of ±30°. Subsequently, this polarizer is applied in the linearly polarized microstrip patch antenna as superstrate, making this antenna composite radiate circularly polarized wave. In addition, the antenna gain is enhanced by about 3 dB in comparison with conventional patch antenna without polarizer. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1770–1774, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26884
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