摘要
数字多波束天线的波束指向精度与发射终端通道一致性有密切关系。针对通道一致性问题从硬件和软件两方面对发射终端进行了设计。硬件方面主要是采用等长线的方法保证各个通道信号所经过的链路时延一致。软件方面设置相关参数使通道间时间同步和D/A同步,并通过标校校准每个通道的输出信号。试验结果表明,以上措施有效地减小了通道间幅度、相位和时延差异,提高了通道一致性。该研究也为其他阵列天线系统设计提供了有益的参考。
The pointing accuracy of digital multi-beam antennas is closely related to the consistency of transmitting channels.To solve the problem of channels consistency,the design is made from two aspects including hardware and software.In the hardware aspect, the method of equal-length circuit is used to ensure that the path that signal on every channel passes through is identical in time delay. In the software aspect,correlative parameters are set to synchronize time and D/ A among channels,and the output signal of every chan-nel is aligned by calibration. Experiment results show the measures above reduce the difference in amplitude,phase and time delay among channels,and improve the channel consistency.The study is a useful reference for other array antennas system.
出处
《无线电工程》
2016年第9期73-75,79,共4页
Radio Engineering
基金
国际合作课题基金资助项目(2013DFA10540)
河北省"三三三人才"培养基金资助项目(A201400116)
关键词
阵列天线
数字多波束
通道一致性
同步
array antennas
digital multi-beam
channel consistency
synchronization
