Whether any communication technology that uses radio frequency It must be determined whether there is a clear pattern of communication or communication design case NLOS LOS LOS device transmitter and receiver to communicate. Requires installation of a dish receiver or antenna in direct communication with each other and there must be no obstructions come to obscure the spread of radio frequency and to survey the route in the spread, including problems caused by various obstacles, so there is a definition of such areas.As the Fresnel Zone, which is the area where most of the energy is spread from a careful path wityut frequency to the receiver endpoint. The scope of the wider area of Fresnel Zone what is dependent on the frequency of the radio waves used-and the distance between transmitter and receiver.
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