square pulse meaning in English

方形脉冲
矩形脉搏
矩形脉冲

In the second experiment , by introducing helical blumlein line as pfl , we can obtain a square pulse with 260ns pulse duration
首次将具有螺旋结构的blumlein脉冲形成线进行了实验，取得了较好的研究成果。
But if we using the same size blumlein line as pfl , we can only get a square pulse with 31ns pulse duration . this experiment results show that replacing the intermediate conductor of blumlein line by helical conductor can get long pulse
实验表明采用螺旋blumlein型脉冲形成线我们得到负载上的方波脉冲的脉宽为260ns ，而同样长的blumlein线在负载上只能得到31ns的方波。也就是说螺旋blumlein线在原理上是可得到长脉冲的。
Considering that : ( 1 ) radar can achieve its basic application of collision avoidance and warning with the only function of ranging ; ( 2 ) under high speed conditions , radar should have lager effective range than that under slow speed , we designed a new easily realizable automotive anticollision radar , which employs centimeter wave and square pulse amplitude modulation
考虑到：（ 1 ）核心的测距功能实现以后，雷达已经能够完成基本的防撞预警；（ 2 ）在汽车高速运行的情况下，防撞雷达的最小可测距范围和最大作用距离应比低速状态下大。本文采用了技术成熟，易于工程实现的厘米波脉冲雷达，以单波束辐射的方式测距。