Abstract
Recently, the ability of orbital angular momentum (OAM) of electromagnetic fields at radio frequency to multiplex multiple beams has been investigated. Such OAM multiplexing can be used to increase channel capacity and spectral efficiency. However, the studies of OAM multiplexing are restricted to narrow band. In this Letter, the authors experimentally demonstrate a 4.8-Gbit/s broadband OAM and polarisation multiplexing wireless link in which the operating frequency is from 2.1 to 2.7 GHz, with a relative bandwidth about 25%. The proposed wireless communication link over 2.5 m achieves a spectral efficiency of ∼8 bit/s/Hz by using two independent OAM beams for each of two polarisations. All four independent OAM channels propagate along the same beam axis with crosstalk less than −13.3 dB from 2.1 to 2.7 GHz. All four channel signals are recovered with a bit error rate of 3.5 × 10−3 when the signal-to-noise ratio is 24 dB.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.