With Traveling Wave-type Tube Patents (Class 330/43)
  • Patent number: 9640935
    Abstract: A radially polarized thin disk laser comprises a pumping source (10), a collimating lens (20), a focusing lens (30), a laser gain medium (50), a heat dissipating medium (55), a Brewster biaxial cone (60), and an output lens (70) which are arranged in sequence along the laser light path. The Brewster biaxial cone (60) comprises two opposite cones and a cylinder connecting the two cones. The angles between the conical surfaces (S5,S7) and bottom surfaces of the cones are the Brewster angle. The laser gain medium (50) is bonded to the heat dissipating medium (55). A laser sub-resonator is formed between the laser gain medium (50) and the output lens (70). After passing through the collimating lens (20) and the focusing lens (30), the pumping laser beam emitted from the pumping source (10) is focused on the laser gain medium (50), then the generated photons resonate in the laser sub-resonator and finally a radially polarized laser beam is outputted from the output lens (70).
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: May 2, 2017
    Assignees: HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD., HAN'S CNC TECHNOLOGY CO., LTD.
    Inventors: Lei Xiao, Chengwan Gong, Jiantao Zhao, Jinbin Yang, Yanhua Ning, Yunfeng Gao
  • Patent number: 9385929
    Abstract: Provided herein are systems, methods and devices for performing droop compensation. In particular, systems, methods and devices for performing droop compensation by modifying transmit and/or receive characteristics of a magnetic device based on changing conditions are described. For example, a plurality of operating parameters or characteristics can be measured, a droop compensation capability of a link partner can be determined and transmit and/or receive characteristics of the magnetic device can be modified based on the measured operating parameters or characteristics and the determined droop compensation capability.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: July 5, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Hugh Barrass, Roger Antoine Karam
  • Patent number: 9030254
    Abstract: A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified output radio frequency signal intended to power a travelling wave tube amplifier that can be equipped with linearization means with predistortion, at least one first upstream gain control module arranged downstream of the input and one second downstream gain control module arranged downstream of the first upstream gain control module and upstream of any linearization means by predistortion. The channel amplification module also comprises an instantaneous power limiter intended to clip the peaks of the input radio frequency signals with a level exceeding a determined threshold value, the instantaneous power limiter being arranged in series between said first upstream gain control module and said second downstream gain control module.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: May 12, 2015
    Assignee: THALES
    Inventors: Gregory Mouchon, Jean Maynard, David Lopez, Jean-Francois Villemazet
  • Patent number: 8907722
    Abstract: A traveling wave amplifier (TWA) with suppressed jitter is disclosed. The TWA includes a plurality of unit amplifiers with the differential arrangement comprised of a pair of transistors and a cascade transistors connected in series to the switching transistors. The unit amplifiers further includes current sources to provide idle currents to the cascade transistors. Even when the switching transistors fully turn off, the idle currents are provided to the cascade transistors, which set the operating point of the cascade transistor in a region where an increase of the base-emitter resistance is suppressed.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: December 9, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Taizo Tatsumi, Keiji Tanaka, Sosaku Sawada
  • Patent number: 8888995
    Abstract: High power RF energy supplied to a reaction chamber at a resonant frequency is used to break the covalent bonds of a hydrocarbon material without heat. An RF signal generator may be used to supply RF energy to a resonant ring through a four port coupler. The phase of the RF energy passing through the resonant ring may be adjusted to achieve an integral multiple of a resonant wavelength. Wavelength and intensity may be adjusted to sublimate or pyrolyze the hydrocarbon material to yield a useful gaseous product.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: November 18, 2014
    Assignee: Harris Corporation
    Inventors: Victor Hernandez, Lisa Patton
  • Patent number: 8884519
    Abstract: Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: November 11, 2014
    Assignee: Manhattan Technologies Ltd.
    Inventors: James A. Dayton, Jr., Carol L. Kory
  • Patent number: 8847490
    Abstract: Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: September 30, 2014
    Assignee: Manhattan Technologies Ltd.
    Inventors: James A. Dayton, Jr., Carol L. Kory
  • Publication number: 20140285259
    Abstract: A method for operating an amplifier module of a communication satellite involves establishing an undesired state of the amplifier module, storing state data, which indicate the undesired state, in a nonvolatile memory of the amplifier module, after the undesired state has been established, and deactivating the amplifier module after the storage of the state data.
    Type: Application
    Filed: March 18, 2014
    Publication date: September 25, 2014
    Applicant: Tesat-Spacecom GmbH & Co. KG
    Inventors: Hanspeter KATZ, Gerhard REINWALD
  • Publication number: 20140253230
    Abstract: A method for operating a traveling-wave tube module of a communication satellite involves receiving of a high-frequency signal from an antenna of the satellite and determining that the high-frequency signal is to be amplified. The cathode current of a traveling-wave tube is increased to a predetermined operating value if the high-frequency signal is to be amplified and the high-frequency signal is amplified by the traveling-wave tube.
    Type: Application
    Filed: March 7, 2014
    Publication date: September 11, 2014
    Applicant: Tesat-Spacecom GmbH & Co. KG
    Inventors: Hanspeter KATZ, Gerhard REINWALD
  • Patent number: 8723137
    Abstract: Various embodiments of a vacuum electronic device, a hybrid magnet for a vacuum electronic device and methods of making a hybrid magnet for a vacuum electronic device are disclosed herein. In one embodiment, a hybrid magnet for a vacuum electronic device includes a first magnet, a second magnet positioned in spaced-apart relation with the first magnet and defining a gap between the first magnet and the second magnet, and a non-magnetic spacer positioned in a portion of the gap between the first magnet and second magnet and connected to the first magnet and the second magnet.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: May 13, 2014
    Assignee: InnoSys, Inc
    Inventors: Ruey-Jen Hwu, Jishi Ren, Jehn-Huar Chern, Laurence P. Sadwick
  • Publication number: 20140118062
    Abstract: A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified output radio frequency signal intended to power a travelling wave tube amplifier that can be equipped with linearization means with predistortion, at least one first upstream gain control module arranged downstream of the input and one second downstream gain control module arranged downstream of the first upstream gain control module and upstream of any linearization means by predistortion. The channel amplification module also comprises an instantaneous power limiter intended to clip the peaks of the input radio frequency signals with a level exceeding a determined threshold value, the instantaneous power limiter being arranged in series between said first upstream gain control module and said second downstream gain control module.
    Type: Application
    Filed: October 25, 2013
    Publication date: May 1, 2014
    Inventors: Gregory MOUCHON, Jean MAYNARD, David LOPEZ, Jean-Francois VILLEMAZET
  • Patent number: 8674759
    Abstract: A power management system, notably for a dual travelling wave tube amplifier, includes: two travelling wave tubes, each comprising one Anode Zero electrode, and an electronic power conditioner, the power management system being implemented in said electronic power conditioner and including power management means associated with each travelling wave tube, configured for setting the Anode Zero electrode voltage to a determined minimum value when a sleep mode is activated, the power management means maintaining the travelling wave tube operating power at a value below its nominal working range. A sleep mode can advantageously be combined with an RF-Mute mode.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: March 18, 2014
    Assignee: Thales
    Inventors: Etienne Cuignet, Denis Andrin, Emile Tonello
  • Patent number: 8624495
    Abstract: Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: January 7, 2014
    Assignee: Manhattan Technologies Ltd.
    Inventors: James A. Dayton, Jr., Carol L. Kory
  • Patent number: 8624494
    Abstract: Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: January 7, 2014
    Assignee: Manhattan Technologies Ltd.
    Inventors: James A. Dayton, Jr., Carol L. Kory
  • Patent number: 8618736
    Abstract: Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: December 31, 2013
    Assignee: Manhattan Technologies Ltd.
    Inventors: James A. Dayton, Jr., Carol L. Kory
  • Patent number: 8525588
    Abstract: Various apparatuses and methods for a vacuum electronic device are disclosed herein. In one embodiment, a vacuum electronic device includes a vacuum housing, an array of slow wave structures inside the vacuum housing sharing a common electron beam tunnel, an electron beam input port at a first end of the common electron beam tunnel, and an electron beam output port at a second end of the common electron beam tunnel.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 3, 2013
    Assignee: InnoSys, Inc.
    Inventors: Ruey-Jen Hwu, Laurence P. Sadwick, Jishi Ren
  • Publication number: 20120268201
    Abstract: A travelling wave tube amplifier includes: a travelling wave tube comprising a cathode, a helix, an RF input, an RF output, and a plurality of collectors, and an electronic power conditioner providing power supply and electrode polarization to said travelling wave tube, wherein said electronic power conditioner comprises flexibility control means allowing to adjust, via control commands sent through a databus, the helix to cathode voltage and the collector voltages.
    Type: Application
    Filed: October 20, 2011
    Publication date: October 25, 2012
    Applicant: THALES
    Inventors: Etienne CUIGNET, Philippe FAYT, Emile TONELLO
  • Patent number: 8242696
    Abstract: Various apparatuses and methods for a vacuum electronic device are disclosed herein. In one embodiment, a vacuum electronic device includes a vacuum housing, an array of slow wave structures inside the vacuum housing sharing a common electron beam tunnel, an electron beam input port at a first end of the common electron beam tunnel, and an electron beam output port at a second end of the common electron beam tunnel.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: August 14, 2012
    Inventors: Ruey-Jen Hwu, Laurence P. Sadwick, Jishi Ren
  • Patent number: 8212481
    Abstract: A voltage control apparatus used for an electron tube or a power supply apparatus includes a detecting circuit for detecting current flowing through a helix electrode, a voltage-limiting circuit for controlling a potential difference between the helix electrode and the anode electrode based on a predetermined voltage level; and a switch for switching based on an output from the detecting circuit. The switch connects the helix electrode and the anode electrode through the voltage-limiting circuit, or causes a short circuit between the helix electrode and the anode electrode.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: July 3, 2012
    Assignee: NEC Microwave Tube, Ltd
    Inventor: Yukihira Nakazato
  • Patent number: 8179048
    Abstract: Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: May 15, 2012
    Assignee: Teraphysics Corporation
    Inventors: James A. Dayton, Jr., Carol L. Kory
  • Patent number: 7898346
    Abstract: A power supply apparatus for a traveling-wave tube includes an electrical discharge switch and a first resistor that are serially connected, and that are connected between a cathode electrode and a first collector electrode; N (N denotes a positive integer) arresters that are serially connected, and that are inserted between a ground potential and a connection node of the electrical discharge switch and the first resistor; N second resistors that are inserted between the N arresters and a second collector electrode to an Nth collector electrode and a ground potential, respectively; and an electrical discharge control circuit that turns off the electrical discharge switch at a time of normal operation of the power supply apparatus and turns on the electrical discharge switch when stopping operation of the power supply apparatus.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: March 1, 2011
    Assignee: Netcomsec Co., Ltd.
    Inventors: Junichi Kobayashi, Yukihira Nakazato
  • Patent number: 7888873
    Abstract: A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power sources depending on the operational RF power level. For low power applications, biasing of collector electrodes is reduced such that savings in energy costs are realized, and operational temperature and wear are reduced. The control signals are based on values stored in a look-up table. For multiple depressed electrodes, biasing can be controlled in tandem or independently.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: February 15, 2011
    Assignee: Communications and Power Industries, Inc.
    Inventors: Michael J. Cascone, John Arthur Lazar, Jr., John Brinson Overstreet
  • Patent number: 7538608
    Abstract: A RF amplifier includes a RF input section for receiving a RF input signal. At least one single-sided slow-wave structure is associated with the RF interaction section. An electron ribbon beam that interacts with the RF input supported by the at least one single-sided slow-wave structure so that the kinetic energy of the electron beam is transferred to the RF fields of the RF input signal, thus amplifying the RF input signal. A RF output section outputs the amplified RF input signal.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: May 26, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Chiping Chen, Bao-Liang Qian, Richard J. Temkin
  • Patent number: 7525385
    Abstract: A traveling wave amplifier includes a synthetic gate line, a synthetic drain line and a plurality of common drain driven cascode transistor circuits each connected between the synthetic gate line and the synthetic drain line.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: April 28, 2009
    Assignee: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventor: Sushil Kumar
  • Patent number: 7459855
    Abstract: The invention relates to a microwave tube comprising an electron gun generating an electron beam in a cylindrical microwave structure of the tube. The microwave structure delivers a microwave at one output. A collector for collecting electrons from the beam comprising at least one electrode that is mechanically coupled to the microwave structure via a dielectric, the mechanical coupling forming a radial waveguide for propagating spurious microwave radiation (Pr) from the tube. In order to attenuate the spurious radiation from the tube, the radial waveguide (Wg) includes at least one quarter-wave microwave trap having, at least at the operating frequency F of the tube, an open circuit for the microwave propagating in said radial waveguide for propagating spurious radiation.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: December 2, 2008
    Assignee: Thales
    Inventors: Claude Bearzatto, Jean-Luc Piquet, Daniel Plard
  • Publication number: 20080150629
    Abstract: An apparatus that includes a traveling-wave tube having an electron gun having a cathode. The apparatus also includes a first power supply for establishing a first electric potential between the cathode and an anode and for providing an operational current to the cathode to generate a beam of electrons. The apparatus also includes a slow-wave structure having a passage through which the beam of electrons passes. The apparatus also includes a second power supply for providing a voltage to a beam focusing electrode to establish an electric potential between the cathode and the beam focusing electrode. The apparatus also includes a switching module coupled to the first power supply and the second power supply, the switching module providing a current path between the cathode and the beam focusing electrode, wherein the current path is disabled when a biasing current is below a predetermined level.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Applicant: L-3 Communications Electron Technologies, Inc.
    Inventor: David Eric Lewis
  • Patent number: 7368874
    Abstract: A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power sources depending on the operational RF power level. For low power applications, biasing of collector electrodes is reduced such that savings in energy costs are realized, and operational temperature and wear are reduced. The control signals are based on values stored in a look-up table. For multiple depressed electrodes, biasing can be controlled in tandem or independently.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: May 6, 2008
    Assignee: Communications and Power Industries, Inc., Satcom Division
    Inventors: Michael J. Cascone, John Arthur Lazar, Jr., John Brinson Overstreet
  • Patent number: 7358803
    Abstract: A power control system for a satellite receiving radio-frequency signals includes a traveling wave tube amplifier system and corresponding traveling wave tube. An anode voltage of the traveling wave tube amplifier system is used to modulate or saturate the current of the electron beam of the traveling wave tube so that the output power of the traveling wave tube amplifier system, from the saturated electron beam, is proportional to a waveform envelope of the radio-frequency signals.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: April 15, 2008
    Assignee: The Boeing Company
    Inventors: David Ross Goldberg, John E. Eng, Eric F. Nicol
  • Patent number: 7315206
    Abstract: A traveling-wave amplifier includes amplifiers coupled anti-parallel to transmission lines. Phase(s) of the amplifiers provide phase matching, which may additionally or alternately be provided by couplers or spatial offset of the amplifiers and couplers. The traveling-wave amplifier provides compensation for the losses of the transmission lines, amplification of the signals and isolation between input and output by coupling the amplifiers to the transmission lines anti-parallel.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: January 1, 2008
    Assignee: NXP B.V.
    Inventors: Lukas Leyten, Jozef Reinerus Maria Bergervoet
  • Patent number: 7230480
    Abstract: A method, apparatus, article of manufacture, and a memory structure provide the ability to determine an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA). The non-linearity of the TWTA is measured. An input roots mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA is computed. The RMS value identifies an input operating point of the measured non-linearity of the TWTA. Lastly, an output operating point is obtained.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: June 12, 2007
    Assignee: The DirecTV Group, Inc.
    Inventors: Ernest C. Chen, Shamik Maitra
  • Patent number: 7190108
    Abstract: First and second parallel conducting plates include arrayed conducting segments, preferably with specific spacing relative to each other and to the separation of the plates. Currents through the conducting segments are pulsed and phased to produce constructive but unequal interference on the two plates. Among other things, the net result of the interference can produce a net force on the device, and in that manner can be used for propulsion. Preferred devices have up 100 segments or more.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: March 13, 2007
    Inventor: Benjamin La Borde
  • Patent number: 7142052
    Abstract: A traveling wave amplifier (TWA) comprising two or more amplification modules, the inputs of adjacent amplification modules being connected together by a first inductance component of a first characteristic impedance, a second inductance component of a second characteristic impedance and a third inductance component of substantially the first characteristic impedance, the first characteristic impedance being greater than the second characteristic impedance. The outputs of adjacent modules may be similarly connected together by first, second and third inductance components. The characteristic impedance of the second inductance components is preferably substantially equal to that of the circuits to which the TWA is connected, e.g. 50?. The first and third inductance components have a characteristic of 100?. Such a TWA allows balancing of phase velocities between inputs and outputs of the amplification modules, connection of these around via holes, and extends the frequency capability of the TWA.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: November 28, 2006
    Assignee: Qinetiq Limited
    Inventor: Christopher Andrew Zelley
  • Patent number: 7138860
    Abstract: A power control system for a satellite receiving radio-frequency signals includes a digital processor and a traveling wave tube amplifier system and corresponding traveling wave tube. An anode voltage of the traveling wave tube amplifier system is used to modulate or saturate the current of the electron beam of the traveling wave tube so that the output power of the traveling wave tube amplifier system, from the saturated electron beam, is proportional to a waveform envelope of the radio-frequency signals. The digital processor controls anode and RF input signal amplitudes to the traveling wave tube and predicts necessary corrections.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: November 21, 2006
    Assignee: The Boeing Company
    Inventor: John E Eng
  • Patent number: 7071624
    Abstract: A microwave tube has a configuration in which the connection between an anode electrode and the helix is cut, the helix is grounded, and a current suppression element is provided between the anode electrode and ground voltage for suppressing the continuous time interval of the flow of an excess current to the helix that is caused by discharge to a time interval range that does not threaten damage to the helix, i.e., to a time interval range in which an alarm signal is not supplied.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: July 4, 2006
    Assignee: NEC Microwave Tube, Ltd.
    Inventor: Hiroshi Tsuchida
  • Patent number: 6791408
    Abstract: An amplifier system is disclosed. The amplifier system includes a first amplifier, a second amplifier, and a phase noise suppression circuit. The first amplifier includes an input signal terminal and an output signal terminal. The second amplifier includes an input signal terminal and an output signal terminal. The input signal terminal of the second amplifier is coupled to the output signal terminal of the first amplifier. The phase noise suppression circuit includes first and second input terminals and an output terminal. The first input terminal of the phase noise suppression circuit is coupled to the input signal terminal of the first amplifier. The second input terminal of the phase noise suppression circuit is coupled to the output signal terminal of the second amplifier. The output terminal of the phase noise suppression circuit is coupled to the first amplifier.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: September 14, 2004
    Assignee: Teledyne Technologies Incorporated
    Inventors: Yehuda G. Goren, Charles E. Jensen, Donald R. Gagne, Philip M. Lally, David Zavadil
  • Patent number: 6781454
    Abstract: A traveling wave tube assembly has a traveling wave tube and a predistortion network RF coupled and physically coupled to the traveling wave tube. The traveling wave tube and the predistortion network may be located in a high temperature zone. An amplifier located in a low temperature zone, is coupled to the predistortion network by an RF connecting cable.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: August 24, 2004
    Assignee: Hughes Electronics Corporation
    Inventor: George F. Kirkman
  • Publication number: 20040130390
    Abstract: A travelling wave amplifier (TWA) comprising two or more amplification modules, the inputs of adjacent amplification modules being connected together by a first inductance component of a first characteristic impedance, a second inductance component of a second characteristic impedance and a third inductance component of substantially the first characteristic impedance, the first characteristic impedance being greater than the second characteristic impedance. The outputs of adjacent modules may be similarly connected together by first, second and third inductance components. The characteristic impedance of the second inductance components is preferably substantially equal to that of the circuits to which the TWA is connected, e.g. 50 &OHgr;. The first and third inductance components have a characteristic impedance of 100 &OHgr;.
    Type: Application
    Filed: September 24, 2003
    Publication date: July 8, 2004
    Inventor: Christopher Andrew Zelley
  • Patent number: 6734734
    Abstract: A system includes a component having a signal input and a power supply input, wherein the power supply input is in communication with a power supply. The system also includes a voltage probe connected between the power supply input and the signal input, wherein the probe injects a compensating signal into the signal input to compensate for variations in an output signal of the power supply over time.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: May 11, 2004
    Assignee: Teledyne Technologies Incorporated
    Inventors: Yehuda G. Goren, Charles E. Jensen, Philip M. Lally, Donald R. Gagne
  • Publication number: 20040032295
    Abstract: 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.
    Type: Application
    Filed: August 12, 2003
    Publication date: February 19, 2004
    Applicant: Lockheed Martin Corporation
    Inventors: Herbert J. Wolkstein, Douglas Vernon McKinnon
  • Patent number: 6611719
    Abstract: A given high frequency electric power introduced into a cavity resonator is resonated in the long direction of the cavity resonator on an excited mode with a constant electric field intensity along the long direction of the cavity resonator. Then, a human body is set on a table 2 in the cavity resonator so that its body axis can match the long direction of the cavity resonator. Then, the resonated high frequency electric power is applied to the human body.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: August 26, 2003
    Assignee: Niigta University
    Inventor: Yoshiaki Saito
  • Patent number: 6590450
    Abstract: An amplifier system including a vacuum tube amplifier having an input signal terminal, an output signal terminal, and an electron source, and a control circuit having an input terminal coupled to one of the input signal terminal and the output signal terminal, and for controlling a kinetic energy of electrons emitted by the electron source based on one of an input signal to the vacuum tube amplifier and an output signal from the vacuum tube amplifier. According to another embodiment, the control circuit may be for controlling an amount of electrons emitted by the electron source based on one of the input signal to the vacuum tube amplifier and the output signal from the vacuum tube amplifier.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: July 8, 2003
    Assignee: Teledyne Technologies Incorporated
    Inventors: Tong Chen, Yehuda G. Goren
  • Patent number: 6586883
    Abstract: A method and apparatus to individually detect the cathode to helix current of multiple TWTs sharing a common cathode to helix voltage supplied by a single HV EPC, which provides the capability to determine which tube has exceeded the limit and to adequately protect each helix structure from destruction due to excessive current. An apparatus for detecting travelling wave tube helix current comprises a capacitor having an input electrically connected to a radio frequency signal, an inductor having an input electrically connected to an output of the capacitor and to an input to a helix of a travelling wave tube, the helix of the traveling wave tube electrically connected to a chassis of the traveling wave tube by an impedance, a resistor having an input electrically connected to an output of the inductor and an output electrically connected to the chassis of the travelling wave tube; and wherein a cathode to helix current of the travelling wave tube may be sensed across the resistor.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: July 1, 2003
    Assignee: Lockheed Martin Corporation
    Inventors: Theodore John Staub, Herbert Joseph Wolkstein
  • Patent number: 6555964
    Abstract: A power-supply device and amplifier are joined by way of a mechanical/thermal interface to form a unit. Electrical connections between the power-supply device and the amplifier chamber are run within this shared unit. A shared electrical interface is provided for external control- and supply signals, respectively.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: April 29, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Karl-Heinz Huebner, Gerhard Reinwald, Abdel-Messiah Khilla, Hanspeter Katz
  • Publication number: 20020196077
    Abstract: An amplifier system, including a vacuum tube amplifier having an input signal terminal and an output signal terminal, and a phase noise suppression circuit having first and second input terminals and an output terminal, wherein the first input terminal is coupled to the input signal terminal of the vacuum tube amplifier, the second input terminal is coupled to the output signal terminal of the vacuum tube amplifier, and the output terminal is coupled to one of an electron source of the vacuum tube amplifier and an interaction region of the vacuum tube amplifier.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 26, 2002
    Inventors: Yehuda G. Goren, Charles E. Jensen, Donald R. Gagne, Philip M. Lally, David A. Zavadil
  • Patent number: 6498532
    Abstract: An amplifier system. The amplifier system includes a vacuum tube amplifier, an electron source voltage modulation circuit, and a linearization circuit. The vacuum tube amplifier includes an input signal terminal and an output signal terminal. The electron source voltage modulation circuit includes an input terminal coupled to one of the input signal terminal and the output signal of the vacuum tube amplifier, and includes an output terminal coupled to one of an electron source of the vacuum tube amplifier and an interaction region of the vacuum tube amplifier. The linearization circuit is coupled to the input signal terminal of the vacuum tube amplifier.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: December 24, 2002
    Assignee: Teledyne Technologies Incorporated
    Inventors: Yehuda G. Goren, Charles E. Jensen, Donald R. Gagne, Tong Chen, Philip M. Lally
  • Patent number: 6489842
    Abstract: A microwave tube system for use with a spacecraft telecommunication system is provided. The system includes a traveling wave tube subsystem, a high voltage converter subsystem, and a low voltage converter subsystem. The traveling wave tube subsystem includes a plurality of traveling wave tubes. The high voltage converter subsystem powers the traveling wave tube subsystem. The high voltage converter subsystem includes a plurality of high voltage converter members that are paired with the traveling wave tubes on a one-to-one basis. The low voltage converter subsystem is a central power conditioner subsystem including a plurality of low voltage power conditioners that are connected in parallel to one another. A common power output of the central power conditioner subsystem is received by the high voltage converter members which in turn power the traveling wave tubes that are paired with the high voltage converters.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: December 3, 2002
    Assignee: The Boeing Company
    Inventor: John E. Eng
  • Patent number: 6486604
    Abstract: For a traveling-wave valve arrangement with a traveling-wave valve and a linearizing circuit arrangement, it is proposed to design the linearizing circuit arrangement and the traveling-wave valve as one constructional unit and, for the thermal protection of the linearizing circuit arrangement in the simultaneous presence of a high permissible temperature of the valve housing, to maintain the circuit arrangement by means of an active cooling element at a nondamaging temperature lower than the one of the wall of the valve or of a common wall. The cooling element is preferably a Peltier element.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: November 26, 2002
    Assignee: Thales Electron Devices GmbH
    Inventors: Hubert Bradatsch, Andreas Peters
  • Patent number: 6462474
    Abstract: A linear beam device comprises a cathode and an anode spaced therefrom, with the anode and cathode being operable to form and accelerate an electron beam. An RF interaction region having a drift tube is arranged relative to the anode to permit the electron beam to pass therethrough. A multi-stage depressed collector of the linear beam device has a plurality of collector electrodes successively arranged to collect spent electrons of the electron beam after passing through the RF interaction region. Each one of the plurality of collector electrodes has a distinct voltage level applied thereto defining a decelerating electric field within the collector. At least one of the plurality of collector electrodes further comprises a collecting surface having a shape that is normal to a coincident trajectory of the spent electrons, whereby a substantial portion of the collecting surface is covered with a plurality of narrow grooves.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: October 8, 2002
    Assignee: Northrop Grumman Corp.
    Inventor: Robert Spencer Symons
  • Patent number: 6459337
    Abstract: An amplifier system, including a vacuum tube amplifier having an input signal terminal and an output signal terminal, and a phase noise suppression circuit having first and second input terminals and an output terminal, wherein the first input terminal is coupled to the input signal terminal of the vacuum tube amplifier, the second input terminal is coupled to the output signal terminal of the vacuum tube amplifier, and the output terminal is coupled to one of an electron source of the vacuum tube amplifier and an interaction region of the vacuum tube amplifier.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: October 1, 2002
    Assignee: Teledyne Technologies Incorporated
    Inventors: Yehuda G. Goren, Charles E. Jensen, Donald R. Gagne, Philip M. Lally, David Zavadil
  • Publication number: 20020089372
    Abstract: A microwave tube system for use with a spacecraft telecommunication system is provided. The system includes a traveling wave tube subsystem, a high voltage converter subsystem, and a low voltage converter subsystem. The traveling wave tube subsystem includes a plurality of traveling wave tubes. The high voltage converter subsystem powers the traveling wave tube subsystem. The high voltage converter subsystem includes a plurality of high voltage converter members that are paired with the traveling wave tubes on a one-to-one basis. The low voltage converter subsystem is a central power conditioner subsystem including a plurality of low voltage power conditioners that are connected in parallel to one another. A common power output of the central power conditioner subsystem is received by the high voltage converter members which in turn power the traveling wave tubes that are paired with the high voltage converters.
    Type: Application
    Filed: January 5, 2001
    Publication date: July 11, 2002
    Applicant: The Boeing Company
    Inventor: John E. Eng