A Wideband Reconfigurable Intelligent Surface for 5G Millimeter-Wave Applications
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866911745028653056 |
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| author | Wang, Ruiqi Yang, Yiming Makki, Behrooz Shamim, Atif |
| author_facet | Wang, Ruiqi Yang, Yiming Makki, Behrooz Shamim, Atif |
| contents | Despite the growing interest in reconfigurable intelligent surfaces (RISs) for millimeter-wave (mm-wave) bands, and the considerable theoretical work reported by the communication community, there is a limited number of published works demonstrating practical implementations and experimental results. To the authors' knowledge, no published literature has reported experimental results for RISs covering the n257 and n258 mm-wave bands. In this work, we propose a novel wideband RIS design that covers the entire mm-wave 5G n257 and n258 bands. In simulations, the unit cell can maintain a phase difference of 180° +- 20° and a reflection magnitude greater than -2.8 dB within 22.7 to 30.5 GHz (29.3% bandwidth) using one-bit PIN switches. The proposed unit cell design with four circular cutouts and long vias could realize wideband performance by exciting two adjacent high-order resonances (2.5f and 3.5f). The periodic unit cells can maintain an angular stability of 30°. Based on the proposed unit cell, a 20 by 20 RIS array is designed and fabricated with a size of 7.1λ by 7.1λ. The measurement results demonstrate that the proposed RIS could maintain a 3 dB peak gain variation bandwidth among various array configurations within 22.5 to 29.5 GHz (26.9%) and with a beam scanning capability of 50°, making this design a good candidate for 5G mm-wave applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_11572 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | A Wideband Reconfigurable Intelligent Surface for 5G Millimeter-Wave Applications Wang, Ruiqi Yang, Yiming Makki, Behrooz Shamim, Atif Signal Processing Systems and Control Despite the growing interest in reconfigurable intelligent surfaces (RISs) for millimeter-wave (mm-wave) bands, and the considerable theoretical work reported by the communication community, there is a limited number of published works demonstrating practical implementations and experimental results. To the authors' knowledge, no published literature has reported experimental results for RISs covering the n257 and n258 mm-wave bands. In this work, we propose a novel wideband RIS design that covers the entire mm-wave 5G n257 and n258 bands. In simulations, the unit cell can maintain a phase difference of 180° +- 20° and a reflection magnitude greater than -2.8 dB within 22.7 to 30.5 GHz (29.3% bandwidth) using one-bit PIN switches. The proposed unit cell design with four circular cutouts and long vias could realize wideband performance by exciting two adjacent high-order resonances (2.5f and 3.5f). The periodic unit cells can maintain an angular stability of 30°. Based on the proposed unit cell, a 20 by 20 RIS array is designed and fabricated with a size of 7.1λ by 7.1λ. The measurement results demonstrate that the proposed RIS could maintain a 3 dB peak gain variation bandwidth among various array configurations within 22.5 to 29.5 GHz (26.9%) and with a beam scanning capability of 50°, making this design a good candidate for 5G mm-wave applications. |
| title | A Wideband Reconfigurable Intelligent Surface for 5G Millimeter-Wave Applications |
| topic | Signal Processing Systems and Control |
| url | https://arxiv.org/abs/2304.11572 |