noun
weak radio waves; low-power transmission
Technical term used in radio engineering, telecommunications, and regulations. Refers to signals or transmissions of very low power.
微弱電波の送信には免許が不要な場合がある。
A license may not be required for transmitting weak radio waves.
この装置は微弱電波を利用して通信する。
This device communicates using low-power radio signals.
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.