Table of Contents
How are radio communications transmitted?
Radio waves are used for communication such as television and radio. Radio waves are transmitted easily through air. They do not cause damage if absorbed by the human body, and they can be reflected to change their direction. These properties make them ideal for communications.
How does data get transmitted wirelessly?
In short, the transmission of data wirelessly is made possible by the manipulation of radio waves. These waves are generated naturally by generating pulses of electricity. These radio waves can then be modified by their amplitude or frequency in order to transmit sound or data.
What is radio transmission power?
In radio transmission, transmitter power output (TPO) is the actual amount of power (in watts) of radio frequency (RF) energy that a transmitter produces at its output. The radio antenna’s design “focuses” the signal toward the horizon, creating gain and increasing the ERP.
What is transmitter in data communication?
Transmitter: A device that encodes the data to be transmitted in such a way as to create electromagnetic signals that can be transmitted across some kind of transmission system. Destination: Accepts the incoming data from the receiver. The destination device can be a telephone, a computer, a network switch, etc.
How do radio transceivers work?
The simplest radio transceivers only send and receive individual bits of information into the air, whereas more capable transceivers package the information into packets, form headers, and even encrypt and decrypt the data using secure encryption methods.
What is the basic communication link between transmitter and receiver?
Figure 2-1 shows the factors that contribute to the simplest communications link between a transmitter (Tx) and a receiver (Rx). The radio frequency (RF) power flows from the sender (transmitter) to the receiver along this link.
What is the difference between radio transmission and radio reception?
In radio transmission, electromagnetic power from a radio transmitter is coupled by the transmitter antenna into air or free space. In radio reception, electromagnetic radio waves are intercepted by a receiving antenna and coupled into a receiver for detection.
What is the power consumption of a radio transceiver?
Compared to the power consumption of the microcontroller or the sensors, the radio transceiver often uses ten times as much power. This is due to the processing required for modulating and demodulating the radio signal. For low-power radios, only a small portion of the power consumption is used to send the radio signal into the air.