weak radio waves; low-power transmission
Technical term used in radio engineering, telecommunications, and regulations. Refers to signals or transmissions of very low power.
A license may not be required for transmitting weak radio waves.
This device communicates using low-power radio signals.
General term for radio waves or electromagnetic waves; 微弱電波 specifically denotes weak or low-power radio waves.
Adjectival noun meaning 'weak' or 'faint'; used here as a modifier for 電波.
Compound of 微弱 (weak, faint) and 電波 (radio waves). The exact historical derivation is uncertain, but the term is straightforwardly formed from its components.