Beyond-Diagonal RIS Prototype and Performance Evaluation
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912382462197760 |
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| author | Tapie, Jean Nerini, Matteo Clerckx, Bruno del Hougne, Philipp |
| author_facet | Tapie, Jean Nerini, Matteo Clerckx, Bruno del Hougne, Philipp |
| contents | We present the first experimental prototype of a reflective beyond-diagonal reconfigurable intelligent surface (BD-RIS), i.e., a RIS with reconfigurable inter-element connections. Our BD-RIS consists of an antenna array whose ports are terminated by a tunable load network. The latter can terminate each antenna port with three distinct individual loads or connect it to an adjacent antenna port. Extensive performance evaluations in a rich-scattering environment validate that inter-element connections are beneficial. Moreover, we observe that our tunable load network's mentioned hardware constraints significantly influence, first, the achievable performance, second, the benefits of having inter-element connections, and, third, the importance of mutual-coupling awareness during optimization. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_13392 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Beyond-Diagonal RIS Prototype and Performance Evaluation Tapie, Jean Nerini, Matteo Clerckx, Bruno del Hougne, Philipp Signal Processing Information Theory Applied Physics We present the first experimental prototype of a reflective beyond-diagonal reconfigurable intelligent surface (BD-RIS), i.e., a RIS with reconfigurable inter-element connections. Our BD-RIS consists of an antenna array whose ports are terminated by a tunable load network. The latter can terminate each antenna port with three distinct individual loads or connect it to an adjacent antenna port. Extensive performance evaluations in a rich-scattering environment validate that inter-element connections are beneficial. Moreover, we observe that our tunable load network's mentioned hardware constraints significantly influence, first, the achievable performance, second, the benefits of having inter-element connections, and, third, the importance of mutual-coupling awareness during optimization. |
| title | Beyond-Diagonal RIS Prototype and Performance Evaluation |
| topic | Signal Processing Information Theory Applied Physics |
| url | https://arxiv.org/abs/2505.13392 |