对频率扫描天线能保证当波束扫描时，可以保持一个相对稳定不畸变的辐射方向图。
It is a property for practical application as a frequency scanning antenna since it ensures a stable radiation pattern with little distortions while beam is being scanned.
运用珠粒填料推弯成形工艺成形出的管材截面畸变程度很小，椭圆度不超过1.5%。
The cross-section distortion of bent tube is very small by using ball filler push bending process, with the ovality less than 1.5%.
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