A transceiver is basically a device which contains both, a transmitter as well as a receiver. Both these devices are combined to have a common circuit and is used in various fields. Devices contain a compatible transceiver according to their use and this helps them in having a two-way communication, with the transmitter sending a message and the receiver accepting any kind of incoming message.
Transmitter and Receiver
In electronics and communication, a transmitter is basically a device which sends a message in the form of radio waves with the help of an antenna. The transmitter generates the radio waves and signal is applied to the antenna. The antenna then radiates the given signal in the form of radio waves. This device is used in almost all electronic devices these days ranging from mobile phones, radio, television, walkie talkies, Bluetooth devices, broadcasting stations, etc.
A receiver on the other hand is an electronic device which receives these radio signals and converts them into useful and meaningful information. The receiver also contains an antenna which receives the radio signals. The antenna converts them into small alternating currents and then the receiver extracts the necessary information from them. Often it happens that the receiver antenna accepts signals from various other locations. In order to remove the unwanted signals, the receiver contains electronic filters to remove these undesirable signals from the useful ones.
Transceivers in radio and telephony
As said earlier, transceivers find their use in radio and telephones. The signals are broadcasted from a station through a transmitter, which are received by the receiver on the radio device. In the early days of radio transmission, the transmitter and the receiver were two separate devices and this was done till the year 1920. After that, came the invention of amateur of ham radio which contained a compatibletransceiver. These devices could be made very easily by radio operators back then. In today’s world, almost all radio devices have a compatible transceiver, with the exception of shortwave listening radio, which are made of pure receivers only. A walkie talkie or a citizens band radio can be considered as a good example of radio transceivers.
In telephony, the olden days wired telephones contained the transceivers on the handsets themselves. These handsets were connected to the base by a tinsel wire. In mobile phones and radio telephones, the entire device itself was the transceiver, for both radio and audio.
A modem is a device which also contains a compatible transceiver and is used for modulation and demodulation of signals. Modulation is the process of changing the properties of a carrier signal with that of the message signal in order to be transmitted across a network. After the signal is received on the other end, the signal is demodulated, that is, the message signal is extracted from the received signal.
Thus, transceivers have been a great invention in the electronics and communication world. With the help of this device, we can easily send and receive signals and improve telecommunication with various parts of the world.