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Dual bands of negative refractive indexes in the planar left-handed metamaterials |
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| Authors: | Min-Hua LiHe-Lin Yang Yan TianDong-Yun Hou |
| Institution: | a College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China b Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China c Science and Technology on Electromagnetic Compatibility Laboratory, China Ship Development and Design Center, Wuhan 430064, China |
| Abstract: | A kind of planar left-handed metamaterial (LHM) with unique configurations is demonstrated, which offers an approach in building dual-band negative-index materials. Simulated and experimental results predict two left-handed transmission bands near 11.1 and 14.6 GHz. Dual bands of negative refractive indexes are verified using the retrieval procedure. Field and current distribution at the dual magnetic resonance are also examined. The effective electromagnetic parameters show that by carefully adjusting dimensions of the unit cell, electric and magnetic resonances can be coexistent at some frequency ranges with both negative permittivity and negative permeability. The idea can help us designing planar negative-index materials with multibands. |
| Keywords: | Left-handed material Metamaterial Negative refractive index |
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