Tunable generation and angular steering of a millimeter-wave orbital-angular-momentum beam using differential time delays in a circular antenna array.
Guodong XieYan YanZhe ZhaoLong LiYongxiong RenNisar AhmedAsher J. WillnerChangjing BaoZhe WangCong LiuNima AshrafiSolyman AshrafiShilpa TalwarSoji SajuyigbeMoshe TurAndreas F. MolischAlan E. WillnerPublished in: ICC (2016)