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Journal of Antennas 2023
一种高增益24 GHz车载天线
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Abstract:
微带栅格阵列天线以其结构简单，成本低，增益高，剖面低等优势得到了广泛应用，微带梳状阵列是根据微带栅格阵列天线的传输特性改进而成，将用于传输电场的长边去掉，而不改变微带栅格阵列天线的功能。本文提出了一种基于印刷电路板工艺的24 GHz车载天线，具有高增益，低副瓣和窄波束的特性。首先设计了一个微带梳状线阵天线子阵，然后并排组成10个子阵组成天线阵列。采用切比雪夫分布对各子天线单元进行非均匀激励，以设计低旁瓣电平。最后，天线阵的实增益可达到28.8 dBi，在中心频率 24.125 GHz附近，E面和H面的副瓣电平均低于？15 dB。
Microstrip grid array antenna has been widely used because of its simple structure, low cost, high gain, low profile and other advantages. Microstrip comb array is improved according to the trans-mission characteristics of microstrip grid array antenna, which removes the transmission long side without changing its function. In this paper, a 24 GHz vehicle mounted antenna based on PCB technology is proposed, which has the advantages of high gain, low sidelobe and narrow beam. Firstly, a microstrip comb antenna subarray is designed, and then 10 subarrays are used to form an antenna array. Chebyshev distribution is used to excite each subarray to obtain the low sidelobe level. Finally, the realized gain of the antenna array can reach 28.8 dBi. At the center frequency of 24.125 GHz, the measured sidelobe levels in the E-plane and H-plane are less than ？15 dB.
| [1] | Qian, J.W., Zhu, H.R., Tang, M. and Mao, J.F. (2021) A 24 GHz Microstrip Comb Array Antenna with High Sidelobe Suppression for Radar Sensor. IEEE Antennas and Wireless Propagation Letters, 20, 1220-1224.
https://doi.org/10.1109/LAWP.2021.3075887 |
| [2] | Zhang, L., Zhang, W. and Zhang, Y.P. (2011) Microstrip Grid and Comb Array Antennas. IEEE Transactions on Antennas and Propagation, 59, 4077-4084. https://doi.org/10.1109/TAP.2011.2164216 |
| [3] | Alsath, M.G.N., Lawrance, L. and Kanagasabai, M. (2015) Bandwidth-Enhanced Grid Array Antenna for UWB Automotive Radar Sensors. IEEE Transactions on Antennas and Propagation, 63, 5215-5219.
https://doi.org/10.1109/TAP.2015.2478143 |
| [4] | Yu, C., et al. (2019) 24 GHz Horizontally Polarized Automotive Antenna Arrays with Wide Fan Beam and High Gain. IEEE Transactions on Antennas and Propagation, 67, 892-904. https://doi.org/10.1109/TAP.2018.2880099 |
| [5] | 郝宏刚, 周小川. 一种新型混合馈电24 GHz车载雷达阵列天线设计[J]. 微波学报, 2018, 34(3): 48-51. |
| [6] | 王绍龙, 王伟, 何小祥, 刘冰. 24 GHz小型化低副瓣微带天线阵设计[J]. 微波学报, 2014, 30(S1): 302-304. |
