A UHF VHF TV antenna on a shingled roof at sunset. Television Aerial Antenna - Aerial Roof Antenna Sunset
A military communications module installed in a US military troop transport plane. Military Communication Equipment Military communications gear
A two way radio or walkie talkie as used by security staff to communicate transciever Concepts And Ideas Receiver Two way radio
communication antena with an array of dishes Electromagnetic Antenna - Aerial Telephone Communication Antenna