Ontology highlight
ABSTRACT:
SUBMITTER: Xu J
PROVIDER: S-EPMC6946278 | biostudies-literature | 2019
REPOSITORIES: biostudies-literature
Research (Washington, D.C.) 20191115
Electromagnetic waves carrying an orbital angular momentum (OAM) are of great interest. However, most OAM antennas present disadvantages such as a complicated structure, low efficiency, and large divergence angle, which prevents their practical applications. So far, there are few papers and research focuses on the problem of the divergence angle. Herein, a metasurface antenna is proposed to obtain the OAM beams with a small divergence angle. The circular arrangement and phase gradient were used ...[more]