N a narrow beam of radio signals transmitted by a radio or radar beacon, radio telescope, or some other directional aerial, used for communications, navigation, etc 无线电波束 (Sometimes shortened to beam)
Near some sprites, the team also found radio waves in 310-mile-wide (500-kilometer-wide) bands-and these radio waves were most likely being emitted by high-speed particle beams.
该小组还在一些气辉周围发现了310英里(500公里)波段的无线电波。这些无线电波很有可能就是由高速粒子束发出的。
A DC-contact series radio frequency(RF) micro electromechanical system(MEMS) switch with slanting beams was developed to eliminate warping of the cantilever beam due to residue stresses.
为解决悬臂梁结构的射频微机电系统开关在残余应力的作用下会发生翘曲的问题，提出在悬臂梁的顶端引入斜拉梁的方法。
Light beams can carry more information than radio signals.
光束运载的信息比无线电信号运载的信息多。
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