Method and apparatus for stabilizing pulsed microwave amplifiers

Title: Method and apparatus for stabilizing pulsed microwave amplifiers

Full Record
Other Related Research

Abstract

Phase and amplitude variations at the output of a high power pulsed microwave amplifier arising from instabilities of the driving electron beam are suppressed with a feed-forward system that can stabilize pulses which are too brief for regulation by conventional feedback techniques. Such variations tend to be similar during successive pulses. The variations are detected during each pulse by comparing the amplifier output with the low power input signal to obtain phase and amplitude error signals. This enables storage of phase and amplitude correction signals which are used to make compensating changes in the low power input signal during the following amplifier output pulse which suppress the variations. In the preferred form of the invention, successive increments of the correction signals for each pulse are stored in separate channels of a multi-channel storage. Sequential readout of the increments during the next pulse provides variable control voltages to a voltage controlled phase shifter and voltage controlled amplitude modulator in the amplifier input signal path.

Inventors:: Hopkins, D.B.

Issue Date:: 1993-01-26

OSTI Identifier:: 6229647

Patent Number(s):: 5182524 A

Application Number:: PPN: US 7-850456

Assignee:: Univ. of Calif., Oakland, CA (United States) IMS; EDB-93-122228

DOE Contract Number:: AC03-76SF00098

Resource Type:: Patent

Resource Relation:: Patent File Date: 10 Mar 1992

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; MICROWAVE AMPLIFIERS; STABILIZATION; AMPLITUDES; CONTROL; ELECTRON BEAMS; FEEDBACK; MODULATION; PHASE SHIFT; PULSES; VARIATIONS; AMPLIFIERS; BEAMS; ELECTRONIC EQUIPMENT; EQUIPMENT; LEPTON BEAMS; MICROWAVE EQUIPMENT; PARTICLE BEAMS; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)

Citation Formats


                    Hopkins, D.B. Method and apparatus for stabilizing pulsed microwave amplifiers.  United States: N. p., 1993. 
        Web.

Copy to clipboard


                    Hopkins, D.B. Method and apparatus for stabilizing pulsed microwave amplifiers.  United States.

Copy to clipboard


                    Hopkins, D.B. Tue .  
        "Method and apparatus for stabilizing pulsed microwave amplifiers".  United States.

Copy to clipboard


                    
@article{osti_6229647,

  title        = {Method and apparatus for stabilizing pulsed microwave amplifiers},

  author       = {Hopkins, D.B.},

  abstractNote = {Phase and amplitude variations at the output of a high power pulsed microwave amplifier arising from instabilities of the driving electron beam are suppressed with a feed-forward system that can stabilize pulses which are too brief for regulation by conventional feedback techniques. Such variations tend to be similar during successive pulses. The variations are detected during each pulse by comparing the amplifier output with the low power input signal to obtain phase and amplitude error signals. This enables storage of phase and amplitude correction signals which are used to make compensating changes in the low power input signal during the following amplifier output pulse which suppress the variations. In the preferred form of the invention, successive increments of the correction signals for each pulse are stored in separate channels of a multi-channel storage. Sequential readout of the increments during the next pulse provides variable control voltages to a voltage controlled phase shifter and voltage controlled amplitude modulator in the amplifier input signal path.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1993},

  month        = {1}

}

Copy to clipboard

Patent:

Search for the full text at the U.S. Patent and Trademark Office

Save / Share:

Export Metadata

Save to My Library

Similar records in DOE Patents and OSTI.GOV collections:

Method and apparatus for stabilizing pulsed microwave amplifiers

Patent Hopkins, Donald B. (Sacramento, CA)

Phase and amplitude variations at the output of a high power pulsed microwave amplifier arising from instabilities of the driving electron beam are suppressed with a feed-forward system that can stabilize pulses which are too brief for regulation by conventional feedback techniques. Such variations tend to be similar during successive pulses. The variations are detected during each pulse by comparing the amplifier output with the low power input signal to obtain phase and amplitude error signals. This enables storage of phase and amplitude correction signals which are used to make compensating changes in the low power input signal during themore »« less
Full Text Available
Method of and apparatus for dynamically stabilizing the wind-mixed layer of a solar-water pond

Patent Assaf, G.

A method is described for dynamically stabilizing the convective wind-mixed layer of a salt-water solar pond, which covers a nonconvective halocline, the method comprising providing a source of brine whose salinity differs from the salinity of the water in the wind-mixed layer, and exchanging brine between the source and the wind-mixed layer for creating a two-layer flow regime in the wind-mixed layer due to differences in salinity whereby lighter less dense water flows adjacent the surface of the pond into the source, and heavier, more dense water, flows beneath the lighter water out of the source. A solar pond ismore »« less
Method and apparatus for stabilizing fluid flow

Patent McMurry, E.D.; Abercrombie, B.A.

Methods and apparatus are described for establishing and maintaining a preselected stable gas input rate in a gas-lift system, independently of variations in upstream or downstream pressure. A controller is provided which incorporates a selectively adjustable throttling valve, and a control valve responsive to variations in upstream pressure. A chamber is provided between the 2 valves to contain the fluid at a pressure intermediate of upstream and downstream pressures, and a loading mass is connected to the control valve to maintain a fixed differential in the chamber between the intermediate and the upstream pressure. (7 claims)
Method and apparatus for stabilizing signals in radioactive well logging tools

Patent Kampfer, J.G.; Ingram, L.A.

A method and apparatus are presented for stabilizing signals in radioactive well logging tools. In the tool a main scintillating crystal and photomultiplier tube for detecting radiation induced in the borehole by a source of radiation are provided and a reference crystal, including a source of mono-energetic radiation, for producing continuous reference signals of a predetermined energy level. The signals are monitored and the spectrum is stabilized to correct for drift of the data signals introduced by the photomultiplier tube and the data transmission system. The preferred mono-energetic reference signals are selected to appear in the energy spectrum at amore »« less
Stabilizing and drilling apparatus and method

Patent Warren, T.M.; Winters, W.J.; Brett, J.F.

This patent describes a drill collar assembly adapted to form part of a drill string used in drilling a borehole in the earth. It comprises: one or more elongated outer tubular members having connection means at both ends each thereof for interconnection one to another, a lower-most tubular member interconnectable with a drill bit and the lower-most tubular member including an interior weight transfer shoulder; and one or more free-standing weighting members disposed within the tubular members, a lower-most weighting member being adapted to rest upon the interior shoulder of the lower-most tubular member.

Similar Records