Ka频段单偏置天线馈源定位精度分析

Analysis on Position Accuracy of Feed in Ka-band Offset Antenna

抛物面天线中,馈源与反射面的相对位置非常重要,因为它直接影响天线电气性能。以Ka频段单偏置抛物面天线为例,分析计算了馈源横向偏焦、纵向偏焦对天线方向图和增益的影响,并给出2组关于馈源偏焦距离与天线第一旁瓣电平和天线增益相对关系图,为今后天线结构设计提供一个理论依据。测试结果表明,该结果可以应用于实际工程。

In the parabolic antenna,the relative position of feed and reflector is very important,because it can directly influence the performance of antenna.Taking Ka-band single offset antenna as an example,this paper analyzes and calculates the influence of feed horizontal deviation and vertical deviation on antenna pattern and gain,and gives two sets of relative relationship diagrams of partial focus on the distance,the first side lobe level of antenna and the relative antenna gain,which provide a theoretical basis for the future design of antenna structure.The test results show that this result can be used for practical engineering.