| Discussion on coupling mechanism of asymmetric CRLH/RH TL coupler |
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| 作者姓名： | 王佑贞 张冶文 赫丽 刘富强 李宏强 陈鸿 |
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| 作者单位： | School of Electronics and Information Tongji University，Shanghai 200092 China，School of Electronics and Information Tongji University，Shanghai 200092 China Pohl Institute of Solid State Physics Tongji University Shanghai 200092 China，Pohl Institute of Solid State Physics Tongji University，Shanghai 200092 China，School of Electronics and Information Tongji University，Shanghai 200092 China，School of Electronics and Information Tongji University，Shanghai 200092 China Pohl Institute of Solid State Physics Tongji University Shanghai 200092 China，School of Electronics and Information Tongji University，Shanghai 200092 China Pohl Institute of Solid State Physics Tongji University Shanghai 200092 China |
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| 基金项目： | Project supported by the National Basic Research Program (973) of China (No. 2004CB719802) and the National Natural Science Foun-dation of China (No. 50477048) |
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| 摘 要： | INTRODUCTION In recent years metamaterials, more commonly referred to as left-handed materials, have stimulated great interests in the scientific and engineering field. These artificial materials, which were first theorized by Veselago (1968) and experimentally realized by Shelby et al.(2001), can exhibit specific electromag- netic properties not commonly found in nature. The approach of using transmission line theory was veri- fied to be an efficient design tool for metamaterials applica…
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| 关 键 词： | 微波传输 不规则耦合器 耦合机制 左旋材料 右旋材料 复合结构 |
| 收稿时间： | 2005-11-02 |
| 修稿时间： | 2005-11-21 |
A no-reference blocking artifact metric for B-DCT video |
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| Yang?Fu-zheng,Wan?Shuai,Chang?Yi-lin,Luo?Zhong.Discussion on coupling mechanism of asymmetric CRLH/RH TL coupler[J].Journal of Zhejiang University Science,2006,7(1):95-98. |
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| Authors: | Yang Fu-zheng Wan Shuai Chang Yi-lin Luo Zhong |
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| Institution: | (1) School of Electronics and Information, Tongji University, Shanghai, 200092, China;(2) Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, China |
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| Abstract: | A quasi 0-dB coupler composed of a composite right-/left-handed transmission line (CRLH TL) and a conventional right-handed transmission line (RH TL) is presented. This coupler is shown to exhibit broad bandwidth and tight coupling char- acteristics. The circuit model and S-parameter results are also demonstrated. Another coupler with properly chosen loaded lumped-elements LL and CL in the CRLH TL is proposed to gain further understanding of the coupling mechanism. By adjusting the spacing between the CRLH TL and RH TL from 8 mm to 0.2 mm, it can be shown that backward coupling occurs in the left-handed region. |
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| Keywords: | Asymmetric coupler Coupling mechanism Composite right-/left-handed transmission line (CRLH TL) |
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