Abstract
In this paper, we propose a kind of variable scale aperture sampling reception (VSASR) method for multiple orbital angular momentum (OAM) modes vortex wave reception and demodulation. The VSASR method overcomes the restrictions of equal interval OAM modes which is necessary for the existing partial aperture sampling reception method for keeping the OAM modes orthogonality. Thus, it has higher OAM modes multiplexing utilization efficiency than the partial aperture sampling reception method at the same reception aperture. It is also well for vortex wave consistency reception. Although the orthogonality is a little damaged and there are some other crosstalk OAM modes, the main transmission OAM modes can be kept and distinguished by introducing some specific digital signal processing methods. Finally, for a verification of the presented VSASR method, several reflective metasurface antennas working at 10 GHz are designed, fabricated, and measured to generate different OAM vortex waves. Both the electromagnetic simulation and the measurement experiments are consistent well with the proposed theory analysis, which demonstrates the correctness and effectiveness of the proposed method.
Highlights
The orbital angular momentum (OAM) vortex wave brings great potentials for wireless communication technology
The angular momentum contains spin angular momentum (SAM) that associates with polarization and OAM that associates with field spatial distribution [1]
We summarize the general OAM vortex wave aperture sampling reception (ASR) method and extend the original sampling theorem to the multiple OAM modes vortex wave reception through analogy method
Summary
The orbital angular momentum (OAM) vortex wave brings great potentials for wireless communication technology. Based on the MIMO theory and technology this method is theoretically complete but it did not consider the special OAM vortex wave electromagnetic field distribution and the special vortex beam characteristics. An OAM mode selection method based on the discrete Fourier transform (DFT) feed network and channel matrix analysis is presented, which is an inspiring approach for multiple OAM modes vortex wave transmission and reception [31]. We summarize the general OAM vortex wave aperture sampling reception (ASR) method and extend the original sampling theorem to the multiple OAM modes vortex wave reception through analogy method. A new kind of aperture sampling reception method named variable scale aperture sampling reception (VSASR) is presented based on the already existed ASR method and the extended OAM modes sampling theorem analysis.
Sign-in/Register to view highlights & summary 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.
