In which transmission transponders are used
Answers
Answer:
Sophisticated active transponders are used in communications satellites and on board space vehicles. They receive incoming signals over a range, or band, of frequencies, and retransmit the signals on a different band at the same time.
Transponder - what is it?
Transponder is an abbreviated name fromEnglish, which was formed from the words transmitter and responder ("transmitter", "respondent"). It is a transceiver that receives a signal and sends its own in response to it.
It can receive a signal at one frequency,strengthen it and transfer it to another. Also, he is able to transmit a predetermined message in response to the received signal and generate a response signal only if the correct electronic request is made.
Given these capabilities and frequencies of transponders,which can be used for signal transmission / reception, the scope of such devices is very large. Therefore, we will consider in more detail how and where they are used.
Satellite transponders
In satellite communication, the use of transponders itselfof course. It is thanks to these devices that communication is possible at all. In fact, the transponder is part of the satellite, intended for receiving and transmitting the signal. This signal can be amplified or transmitted at a different frequency.
transponder what is it
Sometimes satellite transponders are installedon the satellite dozens, and all of them are equipped with transmit-receive antennas. Once upon a time, one transponder broadcast only one channel, but today there are compression technologies, because of which the number of transmission channels has grown. It has reached the point that only one orbital position allows to receive several thousand TV channels.
Transponders for travel on toll roads
One of the topical applications of transponders -toll roads. The drivers mostly like this idea, as they get the opportunity to ride along a perfectly straight track, rather than go around the different pits and slow down before a broken road. But sometimes you have to postpone your trip because of the difficulty of payment.
It should be noted that earlier the system of payment wascomplicated. But with the introduction of transponders in it everything has become much easier. Now the payment procedure is in electronic mode, and the driver does not stay on the road at all.