Towards dual-band reconfigurable metasurfaces for satellite networking
Towards dual-band reconfigurable metasurfaces for satellite networking
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DOI：
10.1145/3563766.3564086
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发表时间：
2022-11
期刊：
影响因子：
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通讯作者：
Kun Woo Cho;Yasaman Ghasempour;K. Jamieson
中科院分区：
文献类型：
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作者：
Kun Woo Cho;Yasaman Ghasempour;K. Jamieson
用于互联网服务的第一个近地轨道卫星网络最近已经部署，而且规模正在扩大，但在许多实际情况下仍将面临部署挑战。本文探讨了一种双频、电子可调的智能表面如何实现卫星和移动用户之间的动态波束对准，使城市峡谷的服务成为可能，并改善农村地区的服务。我们的设计首次针对Ku无线电频段的双通道，采用了新颖的双惠更斯谐振器设计，利用无线电互易性，允许我们的表面同时控制卫星上行和下行方向以及反射和传输操作模式的能量。我们的表面WALL-E在电磁模拟器中进行了设计和评估，显示出94%的传输效率和85%的反射效率，在150度视场内，在转向角下，透射光和反射光的功率损失最大为6分贝。对于75cm2的地面，我们的链路预算计算预测，与自由空间路径和砖墙穿透相比，进入农村家庭窗户的链路的信噪比分别提高4d B和24d B。
The first low earth orbit satellite networks for internet service have recently been deployed and are growing in size, yet will face deployment challenges in many practical circumstances of interest. This paper explores how a dual-band, electronically tunable smart surface can enable dynamic beam alignment between the satellite and mobile users, make service possible in urban canyons, and improve service in rural areas. Our design is the first of its kind to target dual channels in the Ku radio frequency band with a novel dual Huygens resonator design that leverages radio reciprocity to allow our surface to simultaneously steer energy in the satellite uplink and downlink directions, and in both reflective and transmissive modes of operation. Our surface, Wall-E, is designed and evaluated in an electromagnetic simulator and demonstrates 94% transmission efficiency and a 85% reflection efficiency, with at most 6 dB power loss at steering angles over a 150 degree field of view for both transmission and reflection. With 75cm2 surface, our link budget calculations predict 4 dB and 24 dB improvement in the SNR of a link entering the window of a rural home in comparison to the free-space path and brick wall penetration, respectively.