volume | PIER Journals

Abstract

This paper proposes an antenna based on a rectangular waveguide to generate dual higher-order orbital angular momentum (OAM) beams. The OAM beams with modes l = -6 and l = -7 are produced by radiating the higher order TE_mn transmitted in the rectangular waveguide through a slot. The measurement results indicate that the impedance bandwidth of less than -10 dB is approximately 37.8% in the range of 15-22 GHz, and the mode purity of the antenna is above 55%. The proposed antenna feed structure is simple and does not require a complex phase-shifting network to generate multi-mode and higher-order OAM beams. Such an OAM-based antenna with dual higher-order OAM beams can be utilized in MIMO-OAM communication systems, radar imaging systems, and rotational speed measurement systems.

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Ms. Na Li

Dr. Lingling Jiao

Dr. Guirong Feng

Dr. Ping Li

Dr. Xiao-Wei Shi