一种应用于平方公里中频阵的八角环天线阵

doi:10.16180/j.cnki.issn1007-7820.2019.01.006

Abstract

Abstract:

Combined with the application scenarios of square kilometer array, an ultra-wideband octagonal ring antenna element based on the resistive frequency selective surface was presented. The standing wave protrusion caused by the reverse phase superposition of the reflection plate at the corresponding frequency point could be effectively suppressed by inserting a square ring resistive frequency selective surface between antenna array and ground plane, which greatly improved impedance bandwidth and reduced the profile of antenna array. Simulation results indicated that based on the resistive frequency selective surface, a 5:1 impedance matching bandwidth was obtained within the ±45° scanning range. At the same time, the profile of the antenna had been also reduced by about 27%. In addition, the antenna element had a stable active pattern, wide half-power lobe width and good polarization performance over the entire operating band.

Key words: square kilometer array, mid-frequency aperture array, octagonal ring antenna element, ultra-wideband, dual-polarization, resistive frequency selective surface

CLC Number:

TN821.8

LU Baojun. Design of an Octagonal Ring Antenna Array Applied to Mid-Frequency Aperture Array of Square Kilometer Array[J].Electronic Science and Technology, 2019, 32(1): 27-31.

Figures/Tables 12

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Table 2

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Table 3

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References 16

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参数	D	L	t_ssub	r₁	k₁	d
数值	80	80	50	17.5	0.6	5
参数	r₂	k₂	i	j	g	G
数值	15.75	0.8	1.5	0.3	0.3	2.4

	0°	E-45°	H-45°	剖面
未加载 RFSS	0.21~0.98 GHz	0.21~0.35 GHz		130 mm
		0.51~1.13 GHz	0.21~1.13 GHz
加载 RFSS	0.28~1.5 GHz	0.26~1.54 GHz	0.3~1.8 GHz	95 mm

频率/GHz	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1	1.1	1.2	1.3	1.4	1.5
2θ₀_.₅_E/(°)	129.3	129.1	126.6	124.7	122.6	120.1	117.7	115.3	111.8	109.1	105.0	101.8	99.1
2θ₀_.₅_H/(°)	129.3	129.1	126.6	124.7	122.6	120.2	117.7	115.3	111.8	109.1	105.0	101.8	99.1
前后比/dB	-30.4	-30.4	-30.4	-30.4	-30.5	-30.5	-30.5	-30.4	-30.4	-30.5	-30.6	-30.6	-30.6
交叉极化/dB	-18.1	-21.6	-23.0	-21.9	-20.5	-19.2	-18.2	-17.4	-16.8	-16.2	-14.8	-10.5	-5.2

Design of an Octagonal Ring Antenna Array Applied to Mid-Frequency Aperture Array of Square Kilometer Array

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