A Low-Divergence Circularly Polarized Dual-Mode OAM Antenna Based on Higher-Order Laguerre-Gaussian Modes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Journal / PublicationIEEE Transactions on Antennas and Propagation
Publication statusOnline published - 24 Feb 2021


An open resonator antenna for orbital angular momentum (OAM) generation and dual-mode application is proposed. The excitation of OAM mode is deduced by the open resonator theory and the circular array theory. In the cavity, eight aperture coupled patch antenna elements are used to excite two higher-order Laguerre-Gaussian HE21 modes with 90° phase difference. Verifying by simulation and experiment, the proposed low-profile antenna can radiate left-hand or right-hand circularly polarized waves of OAM modes l = ± 1, which have relatively low divergence angle of ± 9° and high gain of around 13 dBi.

Research Area(s)

  • Laguerre-Gaussian mode, open resonator antenna (ORA), Orbital angular momentum (OAM)