Resources Contact Us Home
Power regulator for intermittent use of traveling wave tube amplifiers in communications satellites

Image Number 4 for United States Patent #6909235.

A traveling wave tube (TWT) amplifier includes a beam forming electrode (BFE) and a BFE modulator having a bias-based keyer so that the TWT amplifier signals are keyed off during periods when RF power is not to be amplified. Biasing the beam forming electrode voltage off relative to cathode voltage effectively shuts down the electron beam without shutting down the power supply minimizes power supply stress and significantly improves reliability, so that low-level RF signal input is not amplified, and no significant RF power is output. Likewise, given that no amplification has taken place, no power associated with the TWT amplification function is consumed. Thus, the only power consumed by the TWT amplifier is that associated with the cathode heater and the electronic power conditioner (EPC) used as the electron beam source.

  Recently Added Patents
Method for transitioning between Ziegler-Natta and metallocene catalysts in a bulk loop reactor for the production of polypropylene
Systems and methods for providing power and data to lighting devices
Computer implemented apparatus for generating and filtering creative proposal
Sub-LUN input/output profiling for SSD devices
Use of deuterium oxide for the treatment of virus-based diseases of the respiratory tract
Weight-balanced polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus
Fuse part in semiconductor device and method for forming the same
  Randomly Featured Patents
Friction plate for wet type multiplate clutch
Detecting and correcting a failure sequence in a computer system before a failure occurs
Substrate bias generator for dynamic RAM having variable pump current level
Integrated circuit with a capacitor comprising an electrode
Ear cuffs
Itaconate derivatives used for a component of a polymer
Coded aperture light detector for three dimensional camera
Reflector structure in a liquid crystal display having light condensing effect
Driver alerting device
Low locality-of-reference support in a multi-level cache hierachy