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Converged OAM vortex wave generation using EBG‐loaded patch array antenna
Author(s) -
Zhang Di,
He Changhui,
Chen Qiang,
Liu Jie,
Hong Liang
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22711
Subject(s) - antenna (radio) , physics , patch antenna , antenna array , optics , angular momentum , radiation pattern , acoustics , engineering , telecommunications , quantum mechanics
In this article, an orbital angular momentum (OAM) patch array antenna with converged beam is proposed. The electromagnetic band gap (EBG) structure is applied to a patch array antenna with 2 × 2 elements. The array antenna is excited by a carefully designed feeding phase shift network with equal output energy for four output ports. Thus, the OAM vortex wave with topological charge l = 1 is generated. By using EBG structure around the radiating patches, the surface wave of the array antenna is suppressed. As a result, the radiation pattern is improved significantly, including the enhanced gain and reduced divergence angle. A prototype was fabricated and measured. The measurement results agree well with the simulations. Compared with the other approaches, the proposed antenna is much more compact in structure and ease of fabrication.