Paper

{
  "raw_xml": "<entry>\n    <id>http://arxiv.org/abs/2602.20777v1</id>\n    <title>Enabling FR2-5G Communication with Dielectric OAM Transmitarrays</title>\n    <updated>2026-02-24T11:18:19Z</updated>\n    <link href='https://arxiv.org/abs/2602.20777v1' rel='alternate' type='text/html'/>\n    <link href='https://arxiv.org/pdf/2602.20777v1' rel='related' title='pdf' type='application/pdf'/>\n    <summary>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.</summary>\n    <category scheme='http://arxiv.org/schemas/atom' term='physics.app-ph'/>\n    <published>2026-02-24T11:18:19Z</published>\n    <arxiv:comment>12 pages, 12 figures, 66 references</arxiv:comment>\n    <arxiv:primary_category term='physics.app-ph'/>\n    <author>\n      <name>Miguel Á. Balmaseda-Márquez</name>\n    </author>\n    <author>\n      <name>Juan E. Galeote-Cazorla</name>\n    </author>\n    <author>\n      <name>Álvaro Liébana-Bolívar</name>\n    </author>\n    <author>\n      <name>Alejandro Ramírez-Arroyo</name>\n    </author>\n    <author>\n      <name>Carlos Molero Jiménez</name>\n    </author>\n    <author>\n      <name>J. F. Valenzuela-Valdés</name>\n    </author>\n  </entry>"
}