›› 2013, Vol. 26 ›› Issue (6): 61-.

• Articles • Previous Articles     Next Articles

Application of Feed-forward Technique in Satellitic Solid State Amplifier

NIE Shenglai   

  1. (Professional Unit 5,The 13thResearch Institute,CETC,Shijiazhuang 050051,China)
  • Online:2013-06-15 Published:2013-06-04

Abstract:

Feed-forward technique is an effective method for improving the linearity of solid state amplifier.In order to satisfy the requirement of high-linearity in satellitic solid state amplifier,with the product developed by the 13th Research Institute the paper introduces a classic feed-forward super-linear technique using satellitic solid state amplifier.The paper analyses the feed-forward super-linear principle,preferences of the solid drive amplifier,main amplifier,error amplifier and the choice of vector modulator and adaptive circuit of the amplifier.The third-order intermodulation of satellitic amplifier using feed-forward super-linear technique is smaller than -50 dBc,i.e.an improvement by more than 30 dB relative to traditional solid state amplifier.

Key words: feed-forward super-linear technique;third-order intermodulation;star with solid discharge

CLC Number: 

  • TN927