文中所作的主要工作是为云南天文台十米抛物面设计、制造一付好的对数周期偶极子天线（LPDA）作馈源。
The major work of this thesis is to design and make a good LPDA(log-periodic dipole antenna)as the feed of the ten-meter parabolic reflectors at the Yunnan Observatory.
文中列出了蜗杆传动设计公式，阐述了蜗轮付制造工艺和检验、调整方法。
Besides, the manufacturing chart and adjusting method of worm wheels are also described.
文中给出两个用快速付里叶程序完成的例子。
This paper provides two examples computed by F. F. T. program.
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