However, due to the inherent defects of radar, ARPA cannot provide the precise data which is necessary for automatic collision avoidance.

然而，由于雷达固有的缺陷，ARPA系统并不能提供自动避碰所需的准确信息，从而制约了自动避碰系统的实际应用。

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K-band single balanced Schottky-barrier diode (SBD) mixer, suitable for automotive collision-avoidance radar, has been designed and fabricated.

本文给出了一种应用在汽车防撞雷达前端的单平衡环形混频器。

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Rockwell will be producing the backbone communications, cockpit displays, pilot controls, weather radar and collision-avoidance systems for an estimated 1, 775 Dreamliners.

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