| 摘要: |
| 由于Ka频段通信波束在传播过程中往往会在不同介质参数的物体表面发生反射、折射和散射等，导致多径效应的出现，使得通信波束的跟踪准确度降低。为了缓解多径效应的干扰问题，提出了Ka频段通信相控阵天线自动波束跟踪方法。通过分析Ka频段通信波束频域特性和在多径效应影响下的衰落特性，结合概率分布函数的建立，修正波束的相位方差。利用相控阵天线扫描修正后的通信波束，计算扫描结果下的波束方位角动态值，得出相应的偏航角，从而实现波束的自动跟踪，有效提高多径环境下的波束跟踪精度。该方法可大幅减少接收端响应的色散现象，波束跟踪方位角偏差也较传统方法减小了55%~71%，具有跟踪误差小、准确度较高的特点，满足Ka频段通信的波束跟踪精度要求。 |
| 关键词: Ka频段通信 相控阵天线 自动波束跟踪 |
| DOI：10.20079/j.issn.1001-893x.240710009 |
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| 基金项目: |
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| Automatic Beam Tracking Method for Phased Array Antennas in Ka-band Communication |
| MAO Minquan |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| Due to the reflection,refraction and scattering of Ka-band communication beams on the surface of objects with different medium parameters during propagation,multipath effect occurs,which reduces the tracking accuracy of communication beams.In order to alleviate the interference problem of multipath effect,an automatic beam tracking method of Ka-band communication phased array antenna is proposed.Through the analysis of the frequency domain characteristics and the fading characteristics of Ka-band communication beam, the phase variance of beam is modified by combining with the establishment of probability distribution function.The modified communication beam is scanned by phased array antenna,and the dynamic value of beam azimuth angle under the scanning result is calculated to obtain the corresponding yaw angle,so as to realize the automatic tracking of beam and effectively improve the beam tracking accuracy in multipath environment.This method can greatly reduce the dispersion phenomenon of the response of the receiving end,and the deviation of beam tracking azimuth angle is also reduced by 55% to 71% compared with that of the traditional method.It is featured by small tracking error and high accuracy,and meets the requirements of beam tracking accuracy of Ka-band communication. |
| Key words: Ka-band communication phased array antenna automatic beam tracking |
《电讯技术》编辑部 