| 单词 | radar beacon |
| 释义 | > as lemmasradar beacon radar beacon n. a radio transmitter that automatically transmits a return signal when it receives a signal from a radar transmitter; esp. one whose signal is coded, enabling it to be identified; cf. racon n. ΘΚΠ the mind > attention and judgement > discovery > instrument for detection > [noun] > radar system > apparatus used in > transmitter range beacon1852 radar beacon1945 1945 Electronic Engin. 17 685/2 By this means our airborne forces were enabled to direct themselves to any given point in hostile country where an advance party had already installed a ‘Radar beacon’. 1965 D. K. Barton in R. S. Berkowitz Mod. Radar ii. 12 A modern radar beacon weighing a few pounds can receive signals 100 db below 1 watt and retransmit them as 100-watt pulses, providing tremendous range extension. 1991 Motor Boat & Yachting Jan. 130/3 Radar beacon established, 3 & 10cm, azimuth coverage 110°–340°, nominal range 15 miles. < as lemmas |
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