https://doi.org/10.1140/epjp/i2019-12745-4
Regular Article
Wideband directive emission based on hyperbolic metamaterials
1
School of Materials Science and Engineering, Taiyuan University of Technology, 030024, Taiyuan, China
2
Shanxi Provincial Key Laboratory of Microstructure Electromagnetic Functional Materials, Shanxi Datong University, 037009, Datong, China
* e-mail: lyh030114@163.com
Received:
29
September
2018
Accepted:
15
April
2019
Published online:
27
June
2019
Wideband directive emission properties operating in the canalization regime are found in hyperbolic metamaterials (HMMs). Based on the two-dimensional composite right/left-handed transmission line (CRLH TL) with lumped elements, the proposed HMM exhibits a very flat wave vector iso-frequency dispersion diagram over a wide frequency range. The emitted electromagnetic energy is concentrated around the normal of the HMM slab for all incident angles, and a subwavelength focusing is thus achieved. Canalization-induced abnormal propagations including wideband highly directive emission and subwavelength focusing are verified experimentally in the microwave domain.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
