阶梯形变幅杆
一种在波节区域横截面积发生相对突变的变幅杆，用于产生高增益。从较大横截面积到较小面积的过渡通常通过圆角实现。
截面积渐变的变幅杆（例如悬链线变幅杆、指数形变幅杆、圆锥形变幅杆）不属于阶梯形变幅杆。
也称为阶梯式变幅杆。
参见无变截面变幅杆。
Step horn
A horn that has a relatively sudden change in cross sectional area in the region of the node, which is used to produce a high gain. The transition from a large cross-sectional area to a smaller area usually takes place via a radius.
Horns with a gradual change in area (e.g., catenoidal horns, exponential horns, conical horns) are not considered to be step horns.
Also called stepped horn.
See unshaped horn.