Transmitter is an electronic device which produces radio waves (with the help of an antenna). The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When stimulated by this current, the antenna radiates radio waves. Transmitters are necessary parts of many electronic devices that communicate by radio, such as cell Bluetooth enabled devices, phones, wireless computer networks, two-way radios in aircraft, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. Generators of radio waves for heating or industrial purposes are not usually called transmitters even though they often have similar circuits.The term transmitter is limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters.
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