The authors present the fabrication method and resonant properties of a flexible split‐ring resonator (SRR) metamaterial structure at microwave frequencies. The structure is fabricated by chemical etching on a copper film glued on a thin low loss polymer substrate. The resonant properties using a single circular SRR between two monopole antennas were studied and compared with SRR fabricated on rigid circuit board. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1415–1416, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26814

In this article, we introduce a novel type of horn antenna constructed using artificial plasma sheets. This metamaterial inspired negative permittivity antenna fabricated using thin metallic wires in a specialized manner is observed to have same radiation performance of an equivalent conventional metallic horn structure. This novel plasma antenna can replace the conventional one in all microwave applications. The featherlight weight and the ability to remove the problems related with wind resistance and rain accumulation of this new structure may result in a rethinking of the use of horn antennas in astronomical data collection.

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