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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.04822 |
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| _version_ | 1866929617315561472 |
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| author | Bai, Xudong Wang, Longpan Chen, Yuhua Lu, Xilong Zhang, Fuli Chen, Jingfeng Chen, Wen Xu, He-Xiu |
| author_facet | Bai, Xudong Wang, Longpan Chen, Yuhua Lu, Xilong Zhang, Fuli Chen, Jingfeng Chen, Wen Xu, He-Xiu |
| contents | Programmable metasurfaces promise a great potential to construct low-cost phased array systems due to the capability of elaborate modulation over electromagnetic (EM) waves. However, they are in either reflective or transmissive mode, and usually possess a relatively high profile as a result of the external feed source. Besides, it is difficult to conduct multibit phase shift in metasurfaces, when comparing with conventional phased arrays. Here, we propose a strategy of space-time modulated wideband radiation-type programmable metasurface for low side-lobe beamforming. The wideband programmable metasurface avoids the space-feed external source required by its traditional counterpart, thus achieving a significant reduction of profile through integration of a highefficiency microwave-fed excitation network and metasurface. Furthermore, through introducing space-time-modulated strategy, the high-accuracy amplitude-phase weight algorithm can also be synchronously carried out on the first harmonic component for low side-lobe beam-scanning. Most importantly, adaptive beamforming and generation of interference null can further be created after analyzing the harmonic component characteristics of received signals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_04822 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Space-Time-Modulated Wideband Radiation-Type Programmable Metasurface for Low Sidelobe Beamforming Bai, Xudong Wang, Longpan Chen, Yuhua Lu, Xilong Zhang, Fuli Chen, Jingfeng Chen, Wen Xu, He-Xiu Signal Processing Programmable metasurfaces promise a great potential to construct low-cost phased array systems due to the capability of elaborate modulation over electromagnetic (EM) waves. However, they are in either reflective or transmissive mode, and usually possess a relatively high profile as a result of the external feed source. Besides, it is difficult to conduct multibit phase shift in metasurfaces, when comparing with conventional phased arrays. Here, we propose a strategy of space-time modulated wideband radiation-type programmable metasurface for low side-lobe beamforming. The wideband programmable metasurface avoids the space-feed external source required by its traditional counterpart, thus achieving a significant reduction of profile through integration of a highefficiency microwave-fed excitation network and metasurface. Furthermore, through introducing space-time-modulated strategy, the high-accuracy amplitude-phase weight algorithm can also be synchronously carried out on the first harmonic component for low side-lobe beam-scanning. Most importantly, adaptive beamforming and generation of interference null can further be created after analyzing the harmonic component characteristics of received signals. |
| title | Space-Time-Modulated Wideband Radiation-Type Programmable Metasurface for Low Sidelobe Beamforming |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2412.04822 |