Super high frequency - Wikipedia

Harmonic - Wikipedia

Adcock Antenna, PDF, Antenna (Radio)

High Frequency (HF) - Signal Identification Wiki

File:Higher frequency ITU radio bands.png - Wikimedia Commons

Medium wave - Wikipedia

Ka Band - Wikipedia, PDF, Radio

Ionosonde, PDF, Ionosphere

Harmonic - Wikipedia

FM broadcasting - Wikipedia

Mobile satellite communication network diagram, Hybrid satellite and common carrier network diagram, Mobile satellite TV network diagram

Electrical Symbols — VHF UHF SHF, Electrical Symbols — Qualifying, Electrical Symbols — Transmission Paths