利用给出的公式研究了抛物环面天线的增益和旁瓣特性。
The gain and radiation properties of the antenna are investigated by using the above formulas.
目前，天线的增益及带宽变化已成为衡量rcs减缩手段优劣的主要标准。
At present, the alteration of antenna's gain and bandwidth has been the main criterion which is used to weigh the means of RCS reduction.
扩大反射面，天线的增益也会增加，开始时增加的较多，然后就越来越少了。
With the enlargement of the surfaces, antenna gain also increases, at first considerably and later on less and less.
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