Low-DC voltage-controlled steering-antenna radome utilizing tunable active metamaterial

Tao Jiang, Zhiyu Wang, Dong Li, Jingnan Pan, Bin Zhang, Jiangtao Huangfu, Yannick Salamin, Changzhi Li, Lixin Ran

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Abstract

In this paper, we experimentally realized a steering antenna using a type of active metamaterial with tunable refractive index. The metamaterial is realized by periodically printed subwavelength metallic resonant patterns with embedded microwave varactors. The effective refractive index can be controlled by low direct-current (dc) bias voltage applied to the varactors. In-phase electromagnetic waves transmitting in different zones of such metamaterial slab experience different phase delays, and, consequently, the output direction of the transmitted wave can be steered with progressive phase shift along the interface. This antenna has a simple structure, is very easy to configure the beam direction, and has a low cost. Compared with conventional phased-array antennas, the radome approach has more flexibility to operate with different feeding antennas for various applications.

Original languageEnglish
Article number6082420
Pages (from-to)170-178
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Volume60
Issue number1
DOIs
StatePublished - Jan 1 2012

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Keywords

  • Metamaterial
  • steering antenna
  • varactor

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