Traveling Wave Tube With Delay-type Transmission Line Patents (Class 315/3.5)
  • Patent number: 10291085
    Abstract: A magnet arrangement for interacting with drive coils of an electric motor comprises a first drive magnet, a second drive magnet, and a compensation magnet arranged between a coil-facing side of the magnet arrangement and a coil-averted side of the magnet arrangement. The compensation magnet is arranged between the first drive magnet and the second drive magnet. The first drive magnet has a first cross-sectional area, the second drive magnet has a second cross-sectional area, and the compensation magnet has a third cross-sectional area; e.g., with a coil-facing width of the first cross-sectional area and a coil-facing width of the second cross-sectional area in each case greater than a coil-facing width of the third cross-sectional area, a coil-averted width of the third cross-sectional area greater than the coil-facing width of the third cross-sectional area, and the third cross-sectional area undercuts the first and second cross-sectional area on the coil-averted side.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: May 14, 2019
    Assignee: Beckhoff Automation GmbH
    Inventor: Uwe Prüssmeier
  • Patent number: 9964574
    Abstract: Systems, devices, and methods for a transformer including: a first drive winding (206) wound on a first core; a second drive winding wound on a second core; a sense winding wound across the first and second cores; and a compensation winding wound across the first and second cores; where one or more utility lines are threaded through a middle of the first and second cores, a common mode current in the one or more utility lines causes one or more pulses to appear on the sense winding, a current on the compensation winding is adjusted until the one or more pulses on the sense winding are cancelled out, and the common mode current on the one or more utility lines is the adjusted current on the compensation winding multiplied by a turn ratio between the compensation winding and the sense winding.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: May 8, 2018
    Assignee: AEROVIRONMENT, INC.
    Inventors: Peter Gabrielsson, Albert Joseph Flack, Scott Berman
  • Patent number: 9958524
    Abstract: A probe calibration device that includes a first offset element having a substantially rectangular first aperture. The probe calibration device includes a tuned pass element disposed adjacent to the first offset element. The tuned pass element has a non-rectangular second aperture. The probe calibration device includes a second offset element disposed adjacent to the tuned pass element and on a side opposite the first offset element. The second offset element has a substantially rectangular third aperture. The probe calibration device includes a backing element disposed adjacent to the second offset element. The first offset element, the tuned pass element, the second offset element and the backing element form a cavity.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: May 1, 2018
    Assignee: THE BOEING COMPANY
    Inventors: Lydell L. Frasch, Nathaniel P. Roman
  • Patent number: 9954580
    Abstract: A power transfer system is provided. The power transfer system includes a field-focusing element including a dielectric material. The dielectric material includes a ceramic material and a polymer material. The ceramic material includes an oxide compound comprising titanium and the polymer material includes a resin.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: April 24, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Kalaga Murali Krishna, Lohit Matani
  • Patent number: 9905897
    Abstract: A device includes a transmission plate, a conductive plate, a first capacitive unit, and electrodes. The transmission plate is configured to be electrically coupled between an input source and a load. The conductive plate includes a winding structure and is configured to be electrically coupled to ground. The first capacitive unit is electrically coupled between the conductive plate and the transmission plate. The electrodes are interdigitated with the winding structure of the conductive plate.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: February 27, 2018
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Hsiao-Tsung Yen, Cheng-Wei Luo
  • Patent number: 9881732
    Abstract: A contactless power transfer system is proposed. The power transfer system comprises a field-focusing element comprising a dielectric material. The dielectric material includes an oxide material including (Mg1-xSrx)yTiO(2+y), wherein x can vary between the value of zero and 1 such that 0?x?1, and y can be 0, 1, or 2. A power transfer system further including a first coil coupled to a power source and a second coil coupled to a load is disclosed. In this system, the field-focusing element including the dielectric material is disposed between the first coil and the second coil.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: January 30, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Kalaga Murali Krishna, Lohit Matani
  • Patent number: 9768486
    Abstract: The present disclosed technique pertains to high Q mode resonators, and, more particularly, to a technique for separating a high Q mode from masking low Q modes. In a first aspect, it includes a high Q mode resonator, comprising: a housing defining a clover-shaped resonating cavity; a dielectric material filling the cavity; an input to the cavity; and an output from the cavity. In a second aspect, it includes a high Q mode resonator, comprising: a housing defining a clover-shaped resonating cavity, the cavity comprising four intersecting right angle, cylindrical chambers; a fluid dielectric material filling the cavity; an input to the cavity; and an output from the cavity. In a third aspect, it includes a method, comprising: introducing a signal to a resonating cavity; resonating the signal within a chamber, the resonating cavity shifting the resonance of the low Q mode higher in frequency than it shifts the high Q mode; and permitting egress of the signal from the resonating cavity.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: September 19, 2017
    Assignee: Lockheed Martin Corporation
    Inventor: Ronald L. Squillacioti
  • Patent number: 9711315
    Abstract: The present disclosure is directed to axial strapping of a multi-core (cascaded) magnetron. The multi-core (cascaded) magnetron includes a cathode and a plurality of cores (anodes) arranged in an axial direction along the cathode. Each of the cores may have a plurality of vanes arranged periodically in an azimuthal direction along a circumference of the cathode and forming by such a way a plurality of resonant cavities. The multi-core (cascaded) magnetron further includes groups of axial straps coupling each of the cores together in the axial direction along the cathode. For example, a first group of axial straps couple the first plurality of vanes of a first core to the second plurality of vanes of a second core. In an embodiment, the axial straps are configured to provide phase synchronization of electromagnetic oscillations induced inside each of the plurality of cores.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: July 18, 2017
    Assignee: Raytheon Company
    Inventor: Andrey D. Andreev
  • Patent number: 9671520
    Abstract: A dielectric loaded accelerator for accelerating charged particles, such as electrons, ions and/or protons, is described herein. The dielectric loaded accelerator accelerates charged particles along a longitudinal axis and towards an outlet of the accelerator. The dielectric loaded accelerator accelerates the charged particles using oscillating electromagnetic fields that propagate within the accelerator according to an electromagnetic mode. The dielectric loaded accelerator described herein includes an electromagnetic mode with a phase velocity that increases towards the outlet of the accelerator and matches a velocity of the charged particles being accelerated along the longitudinal axis of the accelerator. By matching the phase velocity of the oscillating electromagnetic fields to the velocity of the charged particles, the accelerator reduces phase slippage between the fields and the charged particles and, therefore, efficiently accelerates charged particle towards the outlet.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: June 6, 2017
    Assignees: Euclid Techlabs, LLC, Schlumberger Technology Corporation
    Inventors: Tancredi Botto, Benjamin Levitt, Chunguang Jing, Sergey Antipov, Alexei Kanareykin
  • Patent number: 9651504
    Abstract: The invention is a method of Fano resonance microwave spectroscopy of high absorption matter. The method comprises: embedding a magnetic-dipolar-mode (MDM) ferrite disk in the microwave cavity, loading a sample of the high absorption matter in the microwave cavity, using a bias magnetic field to tune the MDM resonance frequency of the ferrite disk to the resonance frequency of the cavity; and observing the symmetric Lorentz-like lineshape of the resonance peaks that are obtained.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: May 16, 2017
    Assignee: B.G. Negev Technologies and Applications Ltd., at Ben-Gurion University
    Inventors: Guy Vaisman, Evgeny Elman, Elad Hollander, Eugene O. Kamenetskii, Reuven Shavit
  • Patent number: 9425020
    Abstract: A miniaturized all-metal slow-wave structure includes: a circular metal waveguide; and metal electric resonance units provided in the circular metal waveguide; wherein the metal electric resonance unit provided in the circular metal waveguide includes a ring-shaped electric resonance metal plate with an electron beam tunnel provided on a center thereof, and a ring plate body of the ring-shaped electric resonance metal plate has two auricle-shaped through-holes symmetrically aside an axial-section; a main body of the auricle-shaped through-hole is a ring-shaped hole, two column holes extending towards a center of a circle are provided at two ends of the ring-shaped hole; the ring-shaped electric resonance metal plates are perpendicular to an axis and are provided inside the circular metal waveguide with equal intervals therebetween, external surfaces of the ring-shaped electric resonance metal plates are mounted on an internal surface of the circular metal waveguide.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: August 23, 2016
    Assignee: niversity of Electronic Science and Technology of China
    Inventors: Zhaoyun Duan, Yanshuai Wang, Xiang Huang, Xinwu Ma, Tao Tang, Minzhi Huang, Zhanliang Wang, Yubin Gong
  • Patent number: 9406477
    Abstract: A slow wave structure of a traveling wave tube is provided. The slow wave structure includes an input port, an output port, a first material, and a second material. The second material is mounted in the first material at periodic intervals in a direction of propagation of a radio frequency signal between the input port and the output port. The second material has a real part of permittivity that is negative and a real part of permeability that is positive at an operational frequency of the radio frequency signal.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: August 2, 2016
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Arash Rashidi Tarhani, Nader Behdad
  • Patent number: 9288858
    Abstract: The present application discloses a light-emitting diode (LED) lighting system, including: a toroidal transformer comprising a pair of input terminals and a pair of output terminals; and an illuminant comprising an LED circuit; wherein the illuminant is electrically connected to the pair of output terminals of the toroidal transformer. The present application uses a toroidal transformer to simplify a circuit and reduce the number of electronic parts used. On one hand, a service life of a product can be prolonged, and on the other hand, costs can be reduced and a recycling rate is high, which is beneficial to environmental protection.
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: March 15, 2016
    Assignee: ENERGY SAVING LIGHTING CONTROLLER LIMITED
    Inventor: Chuen Chiu Lau
  • Patent number: 9281567
    Abstract: A broadband internal antenna using double electromagnetic coupling is disclosed. The disclosed antenna may include: a first conducting member electrically connected to a feeding point; a second conducting member placed at a designated distance from at least a portion of the first conducting member so as to allow a first electromagnetic coupling with at least a portion of the first conducting member, and remaining in a floating state without being coupled to a ground and the feeding point; a third conducting member placed at a designated distance from the second conducting member so as to allow a second electromagnetic coupling with the second conducting member, and electrically connected to the ground; and a fourth conducting member extending from the third conducting member, for radiating RF signals. The disclosed antenna has the advantage of providing broadband characteristics within a limited size.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: March 8, 2016
    Assignee: ACE TECHNOLOGIES CORPORATION
    Inventors: Byoung-Nam Kim, Jong-Ho Jung, Seung-Cheol Lee
  • Patent number: 9244190
    Abstract: Technologies are generally described for transmitting electric power using electromagnetic waves. An example device may include a transmitting unit, a dielectric waveguide, and a receiving unit. The transmitting unit can be configured to transmit the electromagnetic wave through a first waveguide. The dielectric waveguide can be configured to direct the electromagnetic wave from the first waveguide to a second waveguide. Further, the receiving unit can be configured to receive the electromagnetic wave from the dielectric waveguide through the second waveguide. An example borehole radar system may generate an electromagnetic wave from a DC power supply and provide the electromagnetic wave to a power transmitting unit. The power transmitting unit can be configured to transmit the electromagnetic wave through a dielectric waveguide. The electromagnetic wave can be rectified to generate a DC voltage signal, by which a transmitting antenna may be powered to generate a radar signal.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: January 26, 2016
    Assignee: OSAKA ELECTRO-COMMUNICATION UNIVERSITY
    Inventors: Satoshi Ebihara, Kentaro Kawata
  • Patent number: 9202660
    Abstract: In various embodiments, a traveling wave amplifier circuit is disclosed. The traveling wave amplifier circuit is configured to receive an RF wave and an electron beam. The traveling wave amplifier effects synchronized interaction between the RF wave and the electron beam. The traveling wave amplifier circuit comprises a waveguide. The waveguide comprises a plurality of asymmetric cells arranged periodically. The waveguide is configured to receive an electron beam. Each of the asymmetric cells comprises at least one asymmetrical structure within the asymmetric cell to modify the dispersion relation of the waveguide.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 1, 2015
    Assignee: TELEDYNE WIRELESS, LLC
    Inventors: Yehuda G. Goren, Tong Chen
  • Patent number: 9196448
    Abstract: An electron tube includes a shell that encloses a helix inside, and a plurality of support rods that support and fix the helix inside the shell, a part of each support rod that is in contact with an inner wall of the shell being covered with a conductive material, another part of each support rod that is in contact with the helix being covered with a dielectric material. The widths of conductive material of one end and another end of each support rod in a longitudinal direction are different, the side surface not being in contact with the shell nor the helix.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: November 24, 2015
    Assignee: NEC Network and Sensor Systems, Ltd.
    Inventor: Akihiko Kasahara
  • Patent number: 9121757
    Abstract: A terahertz ellipsometer, the basic preferred embodiment being a sequential system having a backward wave oscillator (BWO); a first rotatable polarizer that includes a wire grid (WGP1); a rotating polarizer that includes a wire grid (RWGP); a stage (STG) for supporting a sample (S); a rotating retarder (RRET) comprising first (RP), second (RM1), third (RM2) and fourth (RM3) elements; a second rotatable polarizer that includes a wire grid (WGP2); and a Golay cell detector (DET).
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: September 1, 2015
    Assignee: J.A. WOOLLAM CO., INC.
    Inventor: Craig M. Herzinger
  • Patent number: 9041289
    Abstract: A terahertz interaction circuit is provided. The terahertz interaction circuit includes a waveguide and an electron beam tunnel. The waveguide has a folded shape and in which an electromagnetic wave propagates. The electron beam tunnel is formed to penetrate through the waveguide. An electron beam passes through the electron beam tunnel. The waveguide includes a ridge portion in which a portion of a surface of the waveguide protrudes into the waveguide.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chan-wook Baik, Ho-young Ahn
  • Patent number: 9006971
    Abstract: A planar helix slow-wave structure with straight edge connections where the structure consists of two arrays of thin, parallel, conductors printed on top and bottom faces of a low-loss dielectric material or substrate, the conductors in the arrays printed on the top and bottom surfaces being inclined at different but symmetric pitch angles on the surface of the planar surface, the conjunction ends of the conductors on the top and bottom faces being connected by vertical conductors with circular rings with a diameter greater than the diameter of the vertical conductors to ensure proper connections between them, and a vacuum tunnel inside the planar helix structure.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: April 14, 2015
    Inventors: Ciersiang Chua, Sheel Aditya, Zhongxiang Shen
  • 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: 8884516
    Abstract: A traveling wave device includes a slow wave circuit supported by a dielectric membrane. The dielectric membrane can have a thickness substantially smaller than a wavelength of operation of the traveling wave device.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: November 11, 2014
    Assignee: University of Utah Research Foundation
    Inventors: Mark S. Miller, Guillermo A. Oviedo Vela
  • Publication number: 20140292190
    Abstract: An electron tube includes a shell that encloses a helix inside, and a plurality of support rods that support and fix the helix inside the shell, a part of each support rod that is in contact with an inner wall of the shell being covered with a conductive material, another part of each support rod that is in contact with the helix being covered with a dielectric material. The widths of conductive material of one end and another end of each support rod in a longitudinal direction are different, the side surface not being in contact with the shell nor the helix.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Applicant: NETCOMSEC CO., LTD.
    Inventor: Akihiko KASAHARA
  • Publication number: 20140292191
    Abstract: A traveling wave tube system includes a traveling wave tube, and a power supply device for supplying required power supply voltages to the respective electrodes of the traveling wave tube. The power supply device includes a control voltage generation circuit for generating a control voltage which is a negative DC voltage on the basis of a ground potential and supplying the control voltage to the anode, an anode voltage generation circuit for generating an anode voltage which is a negative DC voltage on the basis of the potential of the anode and supplying the anode voltage to the cathode, and a collector voltage generation circuit for generating a collector voltage which is a positive DC voltage on the basis of the potential of the cathode and supplying the collector voltage to the collector.
    Type: Application
    Filed: March 31, 2014
    Publication date: October 2, 2014
    Applicant: NETCOMSEC Co., Ltd.
    Inventors: Junichi MATSUOKA, Junichi KOBAYASHI
  • 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: 20140265826
    Abstract: In various embodiments, a traveling wave amplifier circuit is disclosed. The traveling wave amplifier circuit is configured to receive an RF wave and an electron beam. The traveling wave amplifier effects synchronized interaction between the RF wave and the electron beam. The traveling wave amplifier circuit comprises a waveguide. The waveguide comprises a plurality of asymmetric cells arranged periodically. The waveguide is configured to receive an electron beam. Each of the asymmetric cells comprises at least one asymmetrical structure within the asymmetric cell to modify the dispersion relation of the waveguide.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Inventors: Yehuda G. Goren, Tong Chen
  • 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: 8823262
    Abstract: The present invention provides a helical slow-wave structure, including a helix, a metal barrel and several supporting rods. The plurality of supporting rods may be inserted into the lines of the grooves tightly, this increases the contact area between the helix and the plurality of supporting rods. With a proper assembly method, the thermal contact resistance between helix and supporting rod may be decreased. So, the invention may enhance the capability of transferring the heat out of the helical slow-wave structure. The helix may have higher heat capacity, therefore, the helical slow-wave structure may become more firm, and more reliable.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: September 2, 2014
    Assignee: University of Electronic Science and Technology of China
    Inventors: Yanyu Wei, Luwei Liu, Yubin Gong, Xiong Xu, Hairong Yin, Lingna Yue, Yang Liu, Jin Xu, Wenxiang Wang
  • Patent number: 8768115
    Abstract: A terahertz interaction circuit includes a waveguide through which electromagnetic waves pass, the waveguide having a folded shape and including a narrow open cavity portion; and an electron beam tunnel through which an electron beam passes, the electron beam tunnel penetrating through the waveguide.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: July 1, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chan-wook Baik, Ho-young Ahn
  • Patent number: 8648533
    Abstract: An overmoded distributed interaction network is provided that generates high peak and average RF power amplification at high frequencies. A series of overmoded cavities are bounded by parallel or concentric grids that may be separated by metallic spacers adapted to function as a photonic bandgap circuit to suppress competing electromagnetic modes. The selected electromagnetic modes have wavelengths much shorter than the lateral dimension of the grids, allowing the beam-wave interaction to be distributed transversely for improved interaction efficiency. The grids may optionally be slotted and arranged to provide a serpentine traveling wave tube configuration.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: February 11, 2014
    Assignee: L-3 Communications Corporation
    Inventors: Richard Donald Kowalczyk, Mark Frederick Kirshner, Craig Bisset Wilsen
  • 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: 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: 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
  • Patent number: 8502451
    Abstract: A collector included in an electron tube is covered with a carbon nanotube layer over a required area on the surface thereof.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: August 6, 2013
    Assignee: Netcomsec Co. Ltd.
    Inventor: Akira Chiba
  • Patent number: 8476830
    Abstract: Various embodiments of a coupled cavity traveling wave tube are disclosed herein. For example, some embodiments provide a coupled cavity traveling wave tube including a plurality of core segments arranged in spaced-apart fashion to form an electron beam tunnel, a first longitudinal member adjacent the plurality of core segments alternately extending toward and receding from successive core segments, and a second longitudinal member adjacent to the plurality of core segments alternately extending toward and receding from successive core segments. The first and second longitudinal members are offset to extend toward different core segments.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: July 2, 2013
    Inventors: Ruey-Jen Hwu, Laurence P. Sadwick, Jishi Ren
  • Patent number: 8427058
    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: Grant
    Filed: February 8, 2011
    Date of Patent: April 23, 2013
    Assignee: L-3 Communications Electron Technologies, Inc.
    Inventor: David Eric Lewis
  • Patent number: 8427057
    Abstract: The invention relates to a microwave frequency structure for microwave tube comprising a cylindrical vacuum jacket and a device for containing an electron beam in the axis of revolution of the cylindrical jacket. The containing device comprises at least two rows, each containing permanent magnets, each row being aligned either side of and equidistant to the beam-containment axis, the at least two rows containing permanent magnets being of parallelepipedal shapes and having a magnetic polarization parallel to one of its edges in a plane transversal to the axis, their direction of magnetization in the row changing alternately from one containing magnet to another next containing magnet, or preceding containing magnet, to create an alternating periodic magnetic field along the containment axis.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: April 23, 2013
    Assignee: Thales
    Inventors: Alain Durand, Alain Le Clair
  • Publication number: 20120286657
    Abstract: A planar helix slow-wave structure with straight edge connections where the structure consists of two arrays of thin, parallel, conductors printed on top and bottom faces of a low-loss dielectric material or substrate, the conductors in the arrays printed on the top and bottom surfaces being inclined at different but symmetric pitch angles on the surface of the planar surface, the conjunction ends of the conductors on the top and bottom faces being connected by vertical conductors with circular rings with a diameter greater than the diameter of the vertical conductors to ensure proper connections between them, and a vacuum tunnel inside the planar helix structure.
    Type: Application
    Filed: April 14, 2010
    Publication date: November 15, 2012
    Inventors: Ciersiang Chua, Sheel Aditya, Zhongxiang Shen
  • 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
  • Publication number: 20120181927
    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: Application
    Filed: March 22, 2012
    Publication date: July 19, 2012
    Inventors: James A. Dayton, JR., Carol L. Kory
  • 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
  • Publication number: 20120133280
    Abstract: Various embodiments of a coupled cavity traveling wave tube are disclosed herein. For example, some embodiments provide a coupled cavity traveling wave tube including a plurality of core segments arranged in spaced-apart fashion to form an electron beam tunnel, a first longitudinal member adjacent the plurality of core segments alternately extending toward and receding from successive core segments, and a second longitudinal member adjacent to the plurality of core segments alternately extending toward and receding from successive core segments.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 31, 2012
    Inventors: Ruey-Jen Hwu, Laurence P. Sadwick, Jishi Ren
  • Publication number: 20120119646
    Abstract: The present invention provides a helical slow-wave structure, including a helix, a metal barrel and several supporting rods. The plurality of supporting rods may be inserted into the lines of the grooves tightly, this increases the contact area between the helix and the plurality of supporting rods. With a proper assembly method, the thermal contact resistance between helix and supporting rod may be decreased. So, the invention may enhance the capability of transferring the heat out of the helical slow-wave structure. The helix may have higher heat capacity, therefore, the helical slow-wave structure may become more firm, and more reliable.
    Type: Application
    Filed: January 6, 2012
    Publication date: May 17, 2012
    Inventors: Yanyu Wei, Luwei Liu, Yubin Gong, Xiong Xu, Hairong Yin, Lingna Yue, Yang Liu, Jin Xu, Wenxiang Wang
  • 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: 8179045
    Abstract: A traveling wave amplifier circuit to receive an RF wave and an electron sheet beam and to effect synchronized interaction therebetween. The circuit includes a wave guide having at least a first wall and a second wall opposite the first wall. The first wall and the second wall are connected to define an axis of propagation and a rectangular wave guide cross-section that is normal to the axis of propagation. The circuit further includes a plurality of first projections located on an interior surface of the first wall of the wave guide, the first projections being pitched in a direction of the axis of propagation. The circuit further includes a plurality of second projections located on an interior surface of the second wall of the wave guide, the second projections being pitched in a direction of the axis of propagation.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: May 15, 2012
    Assignee: Teledyne Wireless, LLC
    Inventors: Yehuda G. Goren, Philip M. Lally
  • Publication number: 20120081003
    Abstract: A terahertz interaction circuit is provided. The terahertz interaction circuit includes a waveguide and an electron beam tunnel. The waveguide has a folded shape and in which an electromagnetic wave propagates. The electron beam tunnel is formed to penetrate through the waveguide. An electron beam passes through the electron beam tunnel. The waveguide includes a ridge portion in which a portion of a surface of the waveguide protrudes into the waveguide.
    Type: Application
    Filed: March 28, 2011
    Publication date: April 5, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chan-wook BAIK, Ho-young AHN
  • Publication number: 20110291559
    Abstract: A terahertz sheet beam klystron (TSBK) includes an electron gun configured to generate a sheet electron beam and a drift tube through which the sheet beam is propagated. The drift tube is provided with multiple resonant cavities and includes a drift tube circuit including an input RF circuit through which an input RF signal is introduced and an output RF circuit through which an output RF signal is extracted, a collector, and a vacuum envelope. The output RF circuit is configured such that Qe (extraction Q) of the drift tube circuit is comparable to Q0 (unloaded Q) of the drift tube circuit, thereby improving the efficiency of the drift tube circuit.
    Type: Application
    Filed: March 3, 2008
    Publication date: December 1, 2011
    Applicant: Communications and Power Industries, Inc.
    Inventor: George Caryotakis
  • Publication number: 20110169404
    Abstract: A traveling wave device includes a slow wave circuit supported by a dielectric membrane. The dielectric membrane can have a thickness substantially smaller than a wavelength of operation of the traveling wave device.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 14, 2011
    Applicant: UNIVERSITY OF UTAH
    Inventors: Mark S. Miller, Guillermo A. Oviedo Vela