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A Hybrid Architecture for Programmable Meta-System Using a Few Active Elements
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DOI：10.1002/lpor.202400062.png)
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Abstract
En 中文
Digital coding and programmable metasurfaces stand out as promising candidates in future wireless communications due to their low costs and fast-action reprogrammable capability. However, 2 significant obstacles, namely integration and power consumption, must be addressed before large-scale engineering application of the programmable metasurface. This work proposes an easy-integration and energy-saving meta-system and demonstrates its application in wireless communications. The meta-system features a hybrid architecture and consists of a programmable feed array and a metasurface lens. The feed array comprises 3 subarrays, in which active elements are doped with passive elements and interconnected configurations are used to efficiently reduce the number of active elements by one-third. The meta-lens acts as a passive phase shifter to enhance the beamforming performance, further reducing the number of active elements. Moreover, the meta-system can switch between different modes to achieve various functions. In particular, the maximum power consumption of the meta-system is only 54 mW, which can be considered nearly passive. A wireless communication experiment is presented, where the meta-system simultaneously serves as the direct digital modulator and the transmitting antenna. Owing to the low cost, high integration, and nearly passive and programmable features, the meta-system has remarkable potential for future applications in wireless communications. A programmable meta-system with hybrid architecture and superior performance is proposed. The programmable feed array in the meta-system involves doping active elements with passive elements and uses its interconnected configuration to reduce the number of active elements and RF chains significantly. The meta-lens serves as a passive phase shifter to increase the beamforming performance. image
Keywords:
Hybrid architecture
low power consumption
meta-system
programmable metasurface
wireless communication
Journal
L
IF:
10
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3.7K
Citations:
2.1W