Enabling FR2-5G Communication with Dielectric OAM Transmitarrays
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866912973442777088 |
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| author | Balmaseda-Márquez, Miguel Á. Galeote-Cazorla, Juan E. Liébana-Bolívar, Álvaro Ramírez-Arroyo, Alejandro Jiménez, Carlos Molero Valenzuela-Valdés, J. F. |
| author_facet | Balmaseda-Márquez, Miguel Á. Galeote-Cazorla, Juan E. Liébana-Bolívar, Álvaro Ramírez-Arroyo, Alejandro Jiménez, Carlos Molero Valenzuela-Valdés, J. F. |
| contents | This paper investigates the potential of near-field (NF) indoor communications in the FR2 frequency bands using fully dielectric structures to generate orbital angular momentum (OAM) waves. All-dielectric platforms based on distributions of T-shaped unit cells are employed for this purpose. The unit cell design is based on a circuital approach and analytical formulations, where phase shifts necessary for OAM generation are achieved by varying the dielectric-to-air ratio within the structure. Based on this unit cell, a set of transmitarrays (TAs) are designed to produce specific OAM modes. These TAs are fabricated in-house using stereolithographic 3D printing and experimentally tested. The tests evaluate two key features of OAM beams: the orthogonality of distinct vortex modes, as characterized by their electric field distributions, and their object-avoidance capability, enabled by the central null characteristic of the wavefront. In addition, a field-test within an indoor environment is conducted emulating a real wireless system. A bit error rate lower than 10\textsuperscript{$-$6} is observed for solidary modes in Tx and Rx, whereas orthogonal modes produces an increment in 4 order of magnitude. The obtained results reveals that the prototype is suitable for short-range scenarios, enabling techniques such as OAM-multiplexation or physical-layer security thanks to the effective orthogonality beteween modes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20777 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Enabling FR2-5G Communication with Dielectric OAM Transmitarrays Balmaseda-Márquez, Miguel Á. Galeote-Cazorla, Juan E. Liébana-Bolívar, Álvaro Ramírez-Arroyo, Alejandro Jiménez, Carlos Molero Valenzuela-Valdés, J. F. Applied Physics This paper investigates the potential of near-field (NF) indoor communications in the FR2 frequency bands using fully dielectric structures to generate orbital angular momentum (OAM) waves. All-dielectric platforms based on distributions of T-shaped unit cells are employed for this purpose. The unit cell design is based on a circuital approach and analytical formulations, where phase shifts necessary for OAM generation are achieved by varying the dielectric-to-air ratio within the structure. Based on this unit cell, a set of transmitarrays (TAs) are designed to produce specific OAM modes. These TAs are fabricated in-house using stereolithographic 3D printing and experimentally tested. The tests evaluate two key features of OAM beams: the orthogonality of distinct vortex modes, as characterized by their electric field distributions, and their object-avoidance capability, enabled by the central null characteristic of the wavefront. In addition, a field-test within an indoor environment is conducted emulating a real wireless system. A bit error rate lower than 10\textsuperscript{$-$6} is observed for solidary modes in Tx and Rx, whereas orthogonal modes produces an increment in 4 order of magnitude. The obtained results reveals that the prototype is suitable for short-range scenarios, enabling techniques such as OAM-multiplexation or physical-layer security thanks to the effective orthogonality beteween modes. |
| title | Enabling FR2-5G Communication with Dielectric OAM Transmitarrays |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2602.20777 |