期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 9, 页码 7403-7412出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3165872
关键词
Beam scanning; dual-polarization; programmable metasurface; reflectarray antenna
资金
- Fundamental Research Funds for the Central Universities
- Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave
- National Natural Science Foundation of China (NSFC) [61801207, 91963128, 62071215, 61731010]
- National Key Research and Development Program of China [2017YFA0700201]
This study proposes a dual-polarized reconfigurable reflectarray (RRA) with dual-polarized beam control using a dual-channel programmable metasurface. By changing the working states of p-i-n diodes in each metasurface element, well-defined beam scanning can be achieved. The proposed RRA has promising applications in wireless communication and tracking/detecting systems.
The concept of dual-polarized reconfigurable reflectarray (RRA) featuring dual-polarized beam control is proposed and demonstrated using a dual-channel programmable metasurface. The p-i-n diodes are incorporated into each metasurface element as the active components to provide independent phase control in two orthogonal polarization channels. By altering the working states of each p-i-n diode, well-defined beam scanning can be obtained. Element design, focal diameter ratio selection, and discretized phase distributions are carefully optimized to ensure stable radiation performance of the proposed RRA. As verification, a prototype consisting of 20 x 20 elements is fabricated and measured, which is controlled by a field programmable gate array-based controller. Measured results show that wide-angle beam scanning up to +/- 40 degrees can be obtained around 7.45 GHz, with peak gains of 21.13 and 20.89 dBi in dual channels, corresponding to aperture efficiencies of 16.35% and 15.47%. The proposed dual-polarized RRA brings a new freedom in polarization manipulations for versatile beam scanning, which provides promising applications in wireless communication and tracking/detecting systems.
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