電波

1. Origins, structure, and basic meaning

• Structure: 電波 is read as でんぱ and means “radio wave” and “signal”.
• Basic usage: It denotes a signal weakening behind a mountain and mapping the range reached by radio waves.

2. Common pitfalls and similar expressions

• 電波が弱い / 電波の届く範囲
  • 電波が弱い naturally describes reception, while 電波の届く範囲 denotes the physical coverage area.