Resources Contact Us Home
Reduction of second order harmonic distortion in high power TWT amplifiers

Image Number 5 for United States Patent #5838195.

Second harmonic distortion of a traveling wave tube amplifier with a bandwidth exceeding one octave is efficiently minimized by generating a low-power second harmonic signal, modifying it by an adaptive filter, and adding the modified second harmonic signal to the fundamental frequency input signal to the TWT. The adaptive filter is controlled by a feedback loop from the output of the TWT and is arranged to minimize the correlation between the generated second harmonic signal and the second harmonic content of the TWT output. Intermodulation distortion is eliminated in a similar manner.

  Recently Added Patents
Electronic system with vertical intermetallic compound
Direct converting apparatus, method for controlling the same, and control signal generation device
Method and system for accomplishing user equipment purge
Magnetic reading and writing device
High-efficiency preambles for communications systems over pseudo-stationary communication channels
Adapter plate for use in mounting an audio/visual device or the like to a surface
Video recording and playing apparatus and its control method
  Randomly Featured Patents
Bearing cooling arrangement for air cycle machine
Drill press
Sunvisor arrangement for automotive vehicle or the like
Safety step for attachment to a truck tailgate
Dryer and a control method thereof
Utilization of low rank coal and peat
Release preventing device for fishing reel
Soluble CTLA4 molecules and uses thereof
Formation and planarization of silicon-on-insulator structures
Method of manufacturing catalyst type exhaust gas purifier