研究目的
To achieve independent and real-time controls of orthogonally-polarized electromagnetic waves via a programmable metasurface, which is attractive for many applications but remains considerably challenging.
研究成果
The proposed PDPM enables independent controls of x- and y-polarized waves, demonstrating advanced functionalities such as a wave-based XOR logic gate, a dual-beam scanning antenna system, and a dual-polarized shared-aperture antenna system. The PDPM's dual-polarization operating feature improves the integration level of metasurface-based electronic systems and increases the capability to control EM waves and digital information.
研究不足
The study does not explicitly mention limitations, but the complexity of integrating a large number of control channels and the precision required in fabricating the metasurface could be considered potential challenges.
1:Experimental Design and Method Selection:
The study involves the design of a polarization-controlled dual-programmable metasurface (PDPM) with modular control circuits for independent manipulations of orthogonally-polarized microwaves in real time. The methodology includes numerical simulation technology and experimental verification.
2:Sample Selection and Data Sources:
The metasurface sample was fabricated by low-cost printed circuit board technology, integrating varactor chips in a passive metasurface.
3:List of Experimental Equipment and Materials:
Includes 'Skyworks SMV2020-079LF' varactor chip, FPGA controller, '74HC238' decoder chip, '74HC373' D-type latch chips, and 'S8050-J3Y' bipolar transistor.
4:Experimental Procedures and Operational Workflow:
The fabricated PDPM sample was tested in a microwave chamber to avoid environmental interference. The setup included a transmitting antenna and a receiving antenna placed on a supporting board, with measurements taken as the board rotated.
5:Data Analysis Methods:
The study analyzed the far-field scattering property of the metasurface and the performance of the PDPM in terms of wide angle scanning, independent dual-plane scanning, high gain, and high cross-polarization isolation.
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