期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 11, 页码 10465-10474出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3191432
关键词
Broadband; circularly polarized CP); folded reflectarray (FRA); metasurface (MS)
资金
- National Natural Science Foundation of China [62171459]
- Natural Science Foundation of Shaanxi Province [2020JZ-33, 2020JQ-814]
- Natural Science Foundation of Shaanxi Education Department [21JK0683]
- National Defense Foundation of China [2019-JCJQ-JJ-081]
- Youth Talent Fund of Shaanxi University Association for Science and Technology [20200114]
This article proposes a novel design of a broadband circularly polarized folded reflectarray (FRA) antenna. The CP FRA utilizes two kinds of metasurfaces (MSs) and a linearly polarized (LP) open waveguide antenna as the feeding source. The designed antenna achieves high gain, wide bandwidth, and high efficiency.
In this article, a novel design of broadband circularly polarized (CP) folded reflectarray (FRA) antenna is proposed. The CP FRA consists of two kinds of metasurfaces (MSs) and a linearly polarized (LP) open waveguide antenna as the feeding source. The bottom MS functions as the main reflector, which is capable of realizing cross-polarization conversion and beam focusing simultaneously. The upper MS is utilized as a subreflector, which could reflect LP wave coming from the feeding source and transmit its orthogonal counterpart into CP wave. For demonstration, the MS-assisted CP FRA antenna is fabricated and measured. Numerical results are consistent with experimental ones, illustrating a peak gain of 24.1 dBi and a peak aperture efficiency of 51% at 9.9 GHz. The 3 dB gain bandwidth and 3 dB axial ratio (AR) bandwidth are achieved as 27.5% (8.8-11.6 GHz) and 43.9% (8-12.5 GHz), respectively. The proposed CP FRA provides a new avenue to realize broadband high-efficiency CP antenna, which may find great potentials in modern wireless communication systems.
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