Abstract
Orbital angular momentum (OAM), providing an additional degree of freedom, has attracted much attention for spectral efficiency and its potential in communications. The need for more compact OAM-based communication systems has inspired research into quasi-circular arrays (QCAs) producing quasi-OAM beams. In this letter, a QCA-based communication system prototype is designed to transmit and receive quasi-OAM beams of dominant mode order l=-1, over a free-space link at 8.5 GHz. The performance of quasi-OAM beams generated by QCAs is analyzed through bit-error-rate (BER) measurements in a lab setting. The BER results are then analyzed against BER of a conventional OAM circular array and augmented quasi-OAM by a QCA to investigate their performance. Furthermore, the intermode interference is analyzed by adding mode l=0. The results indicate the feasibility of a quasi-OAM communication system, and proved to be similar, or better than conventional OAM-based systems, where there is no mode cross-talk. Augmenting OAM modes is also proven to make a quasi-OAM communication link similar to conventional OAM, in the presence of cross-talk.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
