Unguided Media : Types of wireless communication of a electromagnetic wave propogation without using physical conductor.
1) Terrestrial radio channels
2) Satellight radio channnel.
1) Local area radio channel -> used -> wireless LAN equipment.
Wide area Radio channel -> 3G based device
2) Satellight radio.
uplink frequency -> 5.928 - 6.425 GHZ
downlink frequency -> 3.7 - 4.2 GHZ
