The next era began with the study of the technology of sending a signal to radio waves by an audio signal with the signal to radio waves when the sender and receiver frequency slots in the receiver will be able to send and receive audio signals are mixed, coming up with a radio signal. Therefore a communication technology through radio signals come up. And here is the crucial starting point of wireless communication technology of man. When the world enters the era of wireless communications, it makes. Human communication technology development to springboard Has developed a device that is used to communicate up and will shrink to a smaller size until an origin of a mobile phone, your mobile phone, which is a wireless communication device. Can move anywhere.
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