77GHz宽带低副瓣毫米波微带天线设计

doi:10.19665/j.issn1001-2400.2022.05.013

Abstract

Abstract:

Aiming at the problem of narrow bandwidth of a microstrip antenna,a wideband low sidelobe millimeter wave microstrip array antenna for mine robot environment sensing is proposed.The millimeter wave antenna array consists of a main radiation element layer,a parasitic patch layer and an air layer.The main radiation unit adopts the Dolph-Chebyshev array synthesis method to achieve low sidelobe characteristics,the air layer and parasitic unit can effectively broaden the antenna bandwidth by reducing the equivalent dielectric constant and adding new resonance points,and the feed network design of a T-type power divider achieves good impedance matching.HFSS simulation results show that the -10 dB impedance bandwidth of the antenna is 7 GHz,the operating frequency is 76.6~83.6 GHz,the maximum sidelobe level of the E plane is -15 dB,the maximum sidelobe level of the H plane is -24 dB,and the maximum gain is 17 dBi,which can meet the application requirements of millimeter wave radar long-range and short-range switching and echo sensitivity of the complex scattering medium in a wide range.Compared with the current 77 GHz millimeter wave antenna,this antenna effectively reduces the sidelobe level,further expands the working bandwidth,and improves the radar’s anti-interference ability and resolution.In view of the complex geomagnetic environment characteristics of underground coal mines,the strong anti-interference ability and high resolution of the antenna have great advantages in the perception of underground tunnel environment.

Key words: microstrip, broadband, low sidelobe, millimeter wave, coal mine robot

CLC Number:

TN959.5

FAN Wenying, HOU Qingwen, CHEN Xianzhong. Design of the 77GHz broadband low sidelobe millimeter wave microstrip antenna[J].Journal of Xidian University, 2022, 49(5): 109-116.

Figures/Tables 11

References 20

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参数名称	尺寸/mm	参数名称	尺寸/mm	参数名称	尺寸/mm
W₁	0.40	L_f₁	1.30	W_f₀	0.200 0
W₂	0.70	L_f₂	1.24	L_f₀	1.120 0
W₃	1.10	L_f₃	1.14	W_f	0.100 0
W₄	1.36	L_f₄	1.10	h	0.101 6
L₁	1.18	L_p₁	1.34	h₁	0.200 0
L₂	1.16	L_p₂	1.22	W_p	1.220 0
L₃	1.10	L_p₃	1.12	覆铜厚度	0.040 64
L₄	1.03	L_p₄	1.10

参考文献	馈电网络	-10 dB带宽 /GHz	E面最高副瓣电平/dB	H面最高副瓣电平/dB	峰值增益 /dBi	尺寸/mm	阵元数目
[8]	SIW	75.0~78.5	-20	-15.2	21.70	15.4×30.7	6×16
[9]	SIW	75.0~78.8			20.00	13.0×28.3	6×10
[6]	SIW	75.0~78.5	-15	-18.0	20.33		8×10
[7]	微带	75.8~77.3	-22		16.00		1×10
文中提出天线设计	微带	76.6~83.6	-15	-24.0	17.00	10.0×21.0×0.4	4×8+4×8

Design of the 77GHz broadband low sidelobe millimeter wave microstrip antenna

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