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
Hydrodynamic torque converter having a vibration absorber and torsional vibration damper
Feed-forward analog-to-digital converter (ADC) with a reduced number of amplifiers and feed-forward signal paths
Mechanism for an efficient DLL training protocol during a frequency change
Means to share translation lookaside buffer (TLB) entries between different contexts
Flange for xerographic photoreceptor
Dynamic constraint satisfaction problem solver with part-whole hierarchy constraints
Sensor for high pressure processing of articles
  Randomly Featured Patents
Roof tile
Method for loading refuse into containers
Healthy body ball
Method for determining intracellular mineral levels
Injection moulding machine
Device including resin film
2-Substituted-3-methyl-.gamma.-pyrone tricyclic derivatives
Trading keyboard
Cleaning pad holder
Voice-over instructional system and method of voice-over instruction