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Radio beams (Sfxr)

Definition
Concentrated beams of electromagnetic energy roughly from 10 kilohertz to 100 gigahertz, commonly used for radio communication, microwave relays and radar transmissions. (Source: Team)
Broader Term
Particle beams (Sfx)
Narrower Terms
Radar beams (Sfxrr)
Related Terms (Hierarchical)
Electron beams (Sfxe)
Laser beams (Sfxm)
X rays (Sfxx)