Title :
Nonreciprocal Magnetless CRLH Leaky-Wave Antenna Based on a Ring Metamaterial Structure
Author :
Kodera, Toshiro ; Sounas, Dimitrios L. ; Caloz, Christophe
Author_Institution :
Dept. of Electr. & Eng., Yamaguchi Univ., Ube, Japan
fDate :
7/3/1905 12:00:00 AM
Abstract :
A nonreciprocal ferrite-loaded open rectangular composite right/left-handed (CRLH) waveguide structure was introduced by the authors in 2009, and later shown to operate as a novel and useful antenna system. However, this structure suffers from the classical drawbacks of ferrites (bulkiness, heaviness, high cost, nonintegrability, and limitation below the X-band). In order to remedy these issues, this letter replaces the ferrite in that structure with a recently introduced magnetless nonreciprocal ring metamaterial exhibiting essentially the same properties as a ferrite and demonstrates, theoretically and experimentally, its equivalent leaky-wave antenna operation.
Keywords :
ferrite waveguides; leaky wave antennas; metamaterials; rectangular waveguides; ferrite-loaded open-rectangular composite right-left-handed waveguide structure; nonreciprocal magnetless CRLH leaky-wave antenna; ring metamaterial structure; Antenna measurements; Ferrites; Gyromagnetism; Leaky wave antennas; Magnetic moments; Magnetic resonance; Metamaterials; Artificial magnetic gyrotropy; composite right/left-handed (CRLH) mode; gyromagnetism; leaky-wave antenna (LWA); magnetless magnetic metamaterial; nonreciprocal wave propagation; nonreciprocity;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2181477