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
Vending machine
Catalysts and process for producing aldehydes
Use of LPA for encouraging pregnancy, and fertility agent
Method and apparatus to maintain welding current to compensate for deterioration of welding contact tip
Security authentication method, apparatus, and system
Semiconductor device having a plurality of elements on one semiconductor substrate and method of manufacturing the same
  Randomly Featured Patents
Intelligent recording
Smart current attenuator for energy conservation in appliances
Random access memory based space time switch architecture
Thin-film shape memory alloy device and method
Method for reducing shallow trench isolation edge thinning on tunnel oxides using partial nitride strip and small bird's beak formation for high performance flash memory devices
Infrared radiation source and its application for gas measurement
Toilet tissue holder
Reducing back-reflection during ablative imaging
Exposure apparatus and device manufacturing apparatus and method
Engine-driven welding machine