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Abstract

Based on the ray-tracing model, a new method of achieving a high gain and high aperture efficiency Fabry-Perot antenna with metamaterial-based corner reflector is proposed. The proposed Fabry-Perot antenna is composed of a dual circularly polarized patch antenna feed and the metamaterial-based corner reflector. The metamaterial-based corner reflector consists of four phase correction metasurfaces and a partially reflective surface. First, theory and analysis of the Fabry-Perot antenna with metamaterial-based corner reflector are presented. Then, the performances of the dual circularly polarized antenna feed, the traditional Fabry-Perot antenna, and the Fabry-Perot antenna with metamaterial-based corner reflector are compared among each other and analyzed. Finally, the proposed Fabry-Perot antenna is fabricated and measured. The measured left-hand circular polarization (LHCP) gain and the measured right-hand circular polarization (RHCP) gain of the proposed Fabry-Perot antenna are 21.4 dBi and 21.3 dBi, respectively. Comparing with the antenna feed, the LHCP gain and RHCP gain of the proposed Fabry-Perot antenna are enhanced by 16.4 dB and 16.3 dB, respectively. Compared with the traditional Fabry-Perot antenna, the metamaterial-based corner reflector acts as both a reflection surface and a phase correction surface. It manipulates the propagation direction and phase of electromagnetic wave. The proposed Fabry-Perot antenna with high gain, high aperture efficiency and low sidelobe at 2.8 GHz paves the way for developing the solar radio telescope and conducting the observation.

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Authors and contacts

Corresponding author:Liu Hai-Wen,haiwen_liu@hotmail.com

Funds:Project supported by the National Natural Science Foundation of China (Grants No. 11941003), the Key Program of the National Natural Science Foundation of China (Grant No. U1831201), the Joint Funds of the National Natural Science Foundation of China (Grant No. U2031133), the National Key Research and Development Program (Grant No. 2017YFE0128200), and the Applied Basic Research Program of Yunnan Province, China (Grant No. 2019FB009).

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References

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参数	数值/mm	参数	数值/mm	参数	数值/mm
$l_{1} $	588	$w_{1} $	34	h	57
$l_{2} $	100	$w_{2} $	35.976	$h_{1} $	1.524
$l_{3} $	24.7	$w_{3} $	40	$h_{2} $	1.524
$l_{4} $	25.2	$w_{4} $	38	$h_{3} $	1.524
$l_{5} $	43.5	$w_{5} $	28.5	$h_{4} $	1.524
$l_{6} $	16.4	$w_{6} $	26.1	$h_{5}$	57
$l_{7} $	33	$w_{7} $	3.3	$l_{13} $	584.952
$l_{8} $	18.3	$w_{8} $	5.6	$l_{12} $	5.2
$l_9 $	15.8	$l_{10} $	16.4	$l_{11 }$	5.6

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文献	极化	馈源	增益/dBi	口径效率	旁瓣/dB	天线尺寸
[7]	线极化	槽天线	19.1	21.0%	>–12.5	π(3.2λ₀)²× 2.0λ₀
[18]	线极化	贴片天线	21.0	25.0%	–10	6.4λ₀× 6.4λ₀× 1.8λ₀
[23]	圆极化	槽天线	20.0	24.7%	–10	π(3.2λ₀)²× 1.02λ₀
[24]	圆极化	贴片天线	19.1	13.7%	–20	6.8λ₀× 6.8λ₀× 0.5λ₀
本文	左旋圆极化	贴片天线	21.4	36.6%	–22.4	5.5λ₀× 5.5λ₀× 0.56λ₀
本文	右旋圆极化	贴片天线	21.3	35.8%	–22.3	5.5λ₀× 5.5λ₀× 0.56λ₀

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Vol. 71, Issue 4 - 2022-02-20

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