LNA

Satellite Communications Glossary

Satellite Communications — LNA

 

 

 

 

 

 

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Information on LNA

At the satellite communications transponder, the weak RF uplink signal is amplified in a special LNA . Commonly the LNA has been constructed using a low-noise device such as a tunnel-diode amplifier. Modern C-band and KU-band transponders tend to use either gallium-arsenide Schottky barrier field-effect transistors (GaAs FET) or high-mobility electron transistors (HMETs). Ka-band transponders are mainly based on parametric amplifiers. The total noise at the input of the LNA is a function of bandwidth so, before amplification, the RF uplink signal is band-limited by a BPF. The gain of the receiving section of the transponder is approximately 60-70 dB.


Other topics in our resources on Satellite Communications related to LNA include: 
 
  • Down converter
  • Solid-state Power Amplifier (SSPA)
  • Travelling-wave Tube Amplifier (TWTA)
  • parametric amplifier
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  • tunnel-diode amplifier
  • Up converter
  • Klystron
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  • Magnetometer
  • Broadband amplifier
  • Satellite technology

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