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International Journal of Antennas and Propagation
Volume 2017 (2017), Article ID 1356108, 13 pages
https://doi.org/10.1155/2017/1356108
Review Article

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

1German Aerospace Center (DLR), Microwaves and Radar Institute, Oberpfaffenhofen, Germany
2Chair of High-Frequency Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Munich, Germany

Correspondence should be addressed to E. Öziş; ed.rld@sizeo.igze

Received 20 January 2017; Revised 23 March 2017; Accepted 9 April 2017; Published 20 July 2017

Academic Editor: Scott Rudolph

Copyright © 2017 E. Öziş et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A radome is an integral part of almost every antenna system, protecting antennas and antenna electronics from hostile exterior conditions (humidity, heat, cold, etc.) and nearby personnel from rotating mechanical parts of antennas and streamlining antennas to reduce aerodynamic drag and to conceal antennas from public view. Metamaterials are artificial materials with a great potential for antenna design, and many studies explore applications of metamaterials to antennas but just a few to the design of radomes. This paper discusses the possibilities that metamaterials open up in the design of microwave radomes and introduces the concept of metaradomes. The use of metamaterials can improve or correct characteristics (gain, directivity, and bandwidth) of the enclosed antenna and add new features, like band-pass frequency behavior, polarization transformations, the ability to be switched on/off, and so forth. Examples of applications of metamaterials in the design of microwave radomes available in the literature as well as potential applications, advantages, drawbacks, and still open problems are described.