Explain various components of satellite transponder
Answers
Answer:
A transponder is typically composed of:
an input band-limiting device (an input band-pass filter),
an input low-noise amplifier (LNA), designed to amplify the signals received from the Earth station(normally very weak, because of the large distances involved.)
a frequency translator (normally composed of an oscillator and a frequency mixer) used to convert the frequency of the received signal to the frequency required for the transmitted signal,
an output band-pass filter,
a power amplifier (this can be a traveling-wave tube or a solid-state amplifier).
The transponder is the satellite component that establishes the connection between the satellite's transmitting and receiving antennas.
The transponder serves primarily two purposes. Those enhance and translate the frequency of the incoming input signal. To avoid interference between broadcast and received signals, distinct frequency values are chosen for both uplink and downlink.
Various components of Transponder:
Duplexer:
A two-way microwave gate is known as a duplexer. It receives uplink signals from satellite antennas and broadcasts downlink signals to them.
Low noise amplifier:
The received signal will amplify by the Low Noise Amplifier.
Carrier processor:
The frequency down-conversion of the received signal is performed by the Carrier Processor. The type of transponder is determined by this block.
Power amplifier:
The power of a frequency down-converted signal is amplified to the desired level by a power amplifier.