Radio Communication

Evolution

Late 19th century: Pioneering work of inventors like Guglielmo Marconi

Early 20th century: Rapid development and advancements in radio technology

Spark-gap transmitters to modern digital radio systems

Broadcasting: AM/FM radio stations reach wide audiences

Public safety, military, aviation, maritime navigation

Personal communication: Two-way radios, cellphones

Wireless Transmission

Electromagnetic Spectrum: Frequency bands, avoiding interference

Long-range Communication

Signal Propagation: Air, water, solid objects