Throughput Performance of Wireless Multiple-Input Multiple-Output Systems Using OAM Antennas

This letter experimentally demonstrated the performance improvement of orbital-angular-momentum (OAM) based 2 x 2 MIMO communication by using the diversity of different OAM modes. The OAM antenna we used is an eight-arm Archimedean spiral antenna (ASA) capable of generating multiple high-quality OAM vortex waves individually or two types of two-mode mixed vortex waves simultaneously. Both of the two cases are investigated for MIMO communication by evaluating the throughput performance. For MIMO with two OAM modes (generated by two ASAs separately), the throughput improves upon traditional MIMO by up to 30.50%, while for MIMO with two-mode mixed vortex waves (generated by one ASA), 6.59% throughput improvement is obtained.

Automated summary

This experimental letter demonstrates the performance enhancement of 2x2 MIMO communication based on orbital angular momentum (OAM) by utilizing the diversity of different OAM modes. By using a versatile OAM antenna, the throughput of MIMO communication can be improved by up to 30.50% or 6.59% respectively.