Are you planning a wireless network where obstructions such as trees or buildings are in your line of sight? NLOS or Non-Line of Sight applications require lower frequency radio waves to penetrate obstructions found along the way.
Of the unlicensed ISM frequencies used in the United States, 900 MHz is the perfect choice for NLOS wireless networks. The 900 MHz frequency allows wireless transmissions to travel distances typically up to 1,500 feet with obstructions such as trees and buildings in the way using a directional antenna with around 15dBi of gain. For indoor wireless NLOS applications, some higher powered 900 MHz radios can penetrate up to 10 walls!
