吾人探討任意離焦式饋人器之抛物反射天線並觀察了一些有趣的現象。而天線輻射場型之變化與許多因赤有關，如主波源之位置，焦距與孔徑之比率等。
Paraboloidal reflector antennas with an arbitrarily-defocused feed are investigated. And some interesting phenomena are observed. The variations of the radiation patterns depend on many factors, such as position of the primary source, the f/D ration, and so on.
