Dual-band Beamforming Metasurface with Complex-Amplitude Modulations
2023 International Conference on Microwave and Millimeter Wave Technology (ICMMT)(2023)
摘要
Beamforming is one of the key technologies to improve the quality and reliability of the communication systems. In this work, a beamforming metasurface is proposed to generate the flat-top patterns at 7 and 11.4 GHz. The metasurface is composed of a dual-band circularly polarized unit cell, which can realize the simultaneous and independent complex-amplitude modulations of the incident waves. By arranging appropriate amplitude and phase distributions in the metasurface, we can get the desired flat-top patterns at both frequencies. The full-wave simulated results show that the metasurface can achieve 50° beamwidth and 1.5 dB average fluctuation at both frequencies, and the side lobe levels are less than -10 dB and -18 dB at the lower and higher frequencies, respectively.
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关键词
Beamforming,metasurface,complex-amplitude modulations,dual-band
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