Window Patents (Class 333/252)
  • Patent number: 10677635
    Abstract: A radar level gauge including a wave guiding structure and a cavity formed inside the wave guiding structure, and a dielectric filling member arranged at least partly within said cavity. The dielectric filling member includes a main body formed of a polymer material, at least one microwave absorbing element formed of a modified polymer material providing a microwave attenuation of at least 1 dB/centimeter at an operating frequency of the radar level gauge, the modified polymer material being obtained by modifying said polymer material with a filler material, wherein the at least one microwave absorbing element is integrally formed with said main body by sintering.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 9, 2020
    Assignee: ROSEMOUNT TANK RADAR AB
    Inventors: Håkan Fredriksson, Peter Elmberg, Magnus Ohlsson
  • Patent number: 10644368
    Abstract: A pressure barrier comprising a window with a first side and a second side, a main section comprising a length, a first end, and a second end opposite the first end, a first gradient compression section adjacent to the first end of the main section, and a second gradient decompression section adjacent to the second end of the main section is described. A pressure difference can be formed between the first and second side of the window. The window can comprise a dielectric material, where an average dielectric constant of the gradient compression section increases toward the main section, and an average dielectric constant of the gradient decompression section decreases away from the main section. A microwave propagating in a propagation direction can enter the pressure barrier at the gradient compression section and exit the pressure barrier through the gradient decompression section.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: May 5, 2020
    Assignee: LytEn, Inc.
    Inventors: Michael W. Stowell, Peter Todd Williams
  • Patent number: 10330516
    Abstract: A probe holder for a fill level measuring device operating with the radar principle has a holder housing, a signal conductor for guiding emitted and/or received signals and a spacer. The signal conductor is led out of the interior space of the holder housing through an opening of the holder housing into a process side exterior space of the holder housing. The spacer is arranged in the opening of the holder housing and keeps the signal conductor spaced from the holder housing in the opening. The probe holder realizes a seal relative to the process area in a simple, but effective manner in that the spacer is held in the holder housing by a shrink-fit so that a sealed closure is created between the holder housing and the spacer in the shrunken-in state.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: June 25, 2019
    Assignee: KROHNE S.A.S.
    Inventors: Vincent Pichot, Laurent Peigat
  • Patent number: 10283833
    Abstract: A connector device of the present disclosure includes a waveguide tube having a coupling portion at a distal end portion and adapted to transmit a high-frequency signal while an open end is arranged in a state contacting or placed close to another waveguide tube having a coupling portion at a distal end portion. Additionally, the coupling portion of the waveguide tube has a metallic tube and a dielectric substance provided inside at least a part of the metallic tube. Furthermore, a communication device of the present disclosure includes the waveguide tube having, at the distal end portion, the coupling portion configured as described above, and the communication device is coupled to another communication device including a waveguide tube and transmits a high-frequency signal thereto in a state where open ends of both of the waveguide tubes contact each other or are located close to each other.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: May 7, 2019
    Assignee: Sony Semiconductor Solutions Corporation
    Inventor: Yasuhiro Okada
  • Patent number: 10234321
    Abstract: A radar level gauge system, comprising a transceiver; an antenna; a feed-through connecting the transceiver and the antenna; and processing circuitry coupled to the transceiver.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: March 19, 2019
    Assignee: ROSEMOUNT TANK RADAR AB
    Inventors: Magnus Ohlsson, Peter Elmberg
  • Patent number: 9985413
    Abstract: An optical semiconductor device comprises: a first insulating film provided on a semiconductor layer; a heater provided on the first insulating film; a second insulating film provided on the heater; and an electrode provided on the heater. The electrode extends on the second insulating film; the electrode is in contact with the heater; the second insulating film includes a first region on which the electrode is located; and a thickness of the first region of the second insulating film is greater than that of the first insulating film.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: May 29, 2018
    Assignee: Sumitomo Electric Device Innovations, Inc.
    Inventors: Taro Hasegawa, Toshiyuki Taguchi
  • Patent number: 9543105
    Abstract: A high power RF energy device component is disclosed that is exposed to high power RF energy in a vacuum environment, and includes a multipactor-inhibiting carbon nanofilm covering at least one surface of the component. A secondary electron efficiency emission (SEE) coefficient of the multipactor inhibiting carbon nanofilm is desirably less than a SEE coefficient of the underlying surface of the component.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: January 10, 2017
    Assignee: Nokomis, Inc.
    Inventors: Patrick Fisher, Walter J. Keller, III
  • Patent number: 9490517
    Abstract: Radio frequency (RF) power amplifiers are provided which may include high power, wideband, microwave or millimeter-wave solid state power amplifiers based on waveguide power combiner/dividers.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: November 8, 2016
    Assignee: Nuvotronics, Inc.
    Inventors: Donald X. Wu, David Sherrer, Jean-Marc Rollin
  • Patent number: 9385407
    Abstract: A radio-wave half mirror for millimeter waveband is fixed inside a transmission line propagating electromagnetic waves of millimeter waveband in a single mode so as to transmit a part of incident electromagnetic waves and reflect a part thereof. The radio-wave half mirror includes: a half mirror body where a slit for transmitting electromagnetic waves is provided on a metal plate; and a dielectric plate that is provided on one surface side of the half mirror body so as to form a dielectric resonator which resonates at a frequency determined by the thickness and the permittivity, and has a transmittance characteristic having a degree of inclination substantially the same as that of the half mirror body in a slope which is inverse to a slope of a transmittance characteristic of the half mirror body in a desired frequency range of the millimeter waveband.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: July 5, 2016
    Assignee: ANRITSU CORPORATION
    Inventors: Takashi Kawamura, Akihito Otani
  • Patent number: 9247629
    Abstract: An apparatus includes an electromagnetic waveguide; an iris structure providing an iris in the waveguide. The iris structure may define an iris hole, a first iris slot at a first side of the iris hole, and a second iris slot at a second side of the iris hole. A plasma torch is disposed within the iris hole. An electric field in the waveguide changes direction from the first iris slot to the second iris slot. The plasma torch generates a plasma which is substantially symmetrical around a longitudinal axis of the plasma torch, such that the plasma may have a substantially toroidal shape. In some embodiments, a dielectric material is disposed in the iris hole, outside of the plasma torch. In some embodiments, the height of at least one of the iris slots is greater at the ends thereof than in the middle.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 26, 2016
    Assignee: AGILENT TECHNOLOGIES, INC.
    Inventors: Mehrnoosh Vahidpour, Geraint Owen
  • Patent number: 9212942
    Abstract: A waveguide coupling includes a planar radiator element which couples the transmission signal into a waveguide of the waveguide coupling. The waveguide widens in the direction of the planar radiator element, in such a way that the radiator element can be of a comparatively large diameter without the inner walling of the waveguide detracting significantly from the signal quality.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: December 15, 2015
    Assignee: VEGA Grieshaber KG
    Inventors: Christian Weinzierle, Daniel Schultheiss
  • Patent number: 9160044
    Abstract: A transmission line which allows electromagnetic waves in a predetermined frequency range of a millimeter waveband to propagate in a TE10 models formed by a first waveguide and a second waveguide. A resonator is formed by electric wave half mirrors fixed to the first waveguide and the second waveguide. The second waveguide has a structure in which a first transmission line forming body has a plate shape and has a square hole forming the first transmission line formed to pass therethrough from one surface toward an opposite surface, a second transmission line forming body has a plate shape and has a square hole forming the second transmission line formed to pass therethrough from one surface toward an opposite surface, and the first transmission line forming body and the second transmission line forming body are connectable and separable.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: October 13, 2015
    Assignee: ANRITSU CORPORATION
    Inventors: Takashi Kawamura, Akihito Otani, Hiroshi Hasegawa
  • Patent number: 9109941
    Abstract: A microwave transmitting device for a level measuring device (1) having an electronic device, a microwave emitter and a waveguide (3). The inside of the waveguide is filled with a casting compound. A microwave transmitting device that is particularly compact and cost-effective is implemented by the microwave emitter and the electronic device being enclosed by a casting formed of a casting/potting compound.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: August 18, 2015
    Assignee: KROHNE Messtechnik GmbH
    Inventors: Uwe Wegemann, Peter Angerstein, Michael Deilmann
  • Patent number: 9086311
    Abstract: A microwave-sending device for emitting microwaves includes electronics, a wave coupler, a waveguide, and a wave-emitting section. The electronics, the wave coupler, and the waveguide are joined by a common casting.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: July 21, 2015
    Assignee: KROHNE Messtechnik GmbH
    Inventor: Uwe Wegemann
  • Patent number: 8970329
    Abstract: A high power RF energy device component is disclosed that is exposed to high power RF energy in a vacuum environment, and includes a multipactor-inhibiting carbon nanofilm covering at least one surface of the component. A secondary electron emission (SEE) coefficient of the multipactor inhibiting carbon nanofilm is desirably less than a SEE coefficient of the underlying surface of the component.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: March 3, 2015
    Assignee: Nokomis, Inc.
    Inventors: Patrick J. Fisher, Walter J. Keller, III
  • Patent number: 8963424
    Abstract: A cylindrical waveguide with a mode converter transforms a whispering gallery mode from a gyrotron cylindrical waveguide with a helical cut launch edge to a quasi-Gaussian beam suitable for conveyance through a corrugated waveguide. This quasi-Gaussian beam is radiated away from the waveguide using a spiral cut launch edge, which is in close proximity to a first mode converting reflector. The first mode converting reflector is coupled to a second mode converting reflector which provides an output free-space HE11 mode wave suitable for direct coupling into a corrugated waveguide. The radiated beam produced at the output of the second mode converting reflector is substantially circular.
    Type: Grant
    Filed: January 29, 2011
    Date of Patent: February 24, 2015
    Assignee: Calabazas Creek Research, Inc.
    Inventor: Jeffrey M. Neilson
  • Publication number: 20140333395
    Abstract: A high-power microwave RF window is provided that includes a cylindrical waveguide, where the cylindrical waveguide includes a ceramic disk concentrically housed in a central region of the cylindrical waveguide, a first rectangular waveguide, where the first rectangular waveguide is connected by a first elliptical joint to a proximal end of the cylindrical waveguide, and a second rectangular waveguide, where the second rectangular waveguide is connected by a second elliptical joint to a distal end of the cylindrical waveguide.
    Type: Application
    Filed: May 7, 2014
    Publication date: November 13, 2014
    Inventors: Sami G. Tantawi, Valery A. Dolgashev, Anahid D. Yeremian
  • Patent number: 8803639
    Abstract: A heat insulating transmission line includes a first waveguide with a first aperture end, a second waveguide with a second aperture end, and a reflector. The second waveguide is arranged coaxially with the first waveguide. The second aperture end faces the first aperture end through an air gap. The reflector is provided outside the air gap, and controls radiation power from the air gap. In addition, the reflector is substantially parallel to a portion of a virtual plane connecting an inner wall of the first aperture end of the first waveguide and an inner wall of the second aperture end of the second waveguide. When a mean frequency of a signal transmitting through the heat insulating transmission line is expressed as ?, a distance between the virtual surface and the reflector is not less than N×?/2?0.05? and not more than N×?/2+0.2? (N is a positive integer).
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tamio Kawaguchi, Hiroyuki Kayano, Noritsugu Shiokawa, Kohei Nakayama
  • Patent number: 8763453
    Abstract: An arrangement for measuring fill level of a fill substance in a container, comprising: a fill level measuring device, wherein the device includes measuring device electronics and an antenna connected to the measuring device electronics; and at least one feedthrough installed in a signal path of the microwave signals or the reflection signals; the feedthrough. The feedthrough comprises a hollow conductor, into which a microwave transparent window is inserted gas tightly. The window comprises: a disk, whose thickness corresponds approximately to a half wavelength or a small integer multiple of the half wavelength of a first, hollow conductor propagation capable, signal mode of the microwave signals at a predetermined signal frequency in the disk; and two matching layers located on oppositely lying, outer surfaces of the disk.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: July 1, 2014
    Assignee: Endress + Hauser GmbH + Co. KG
    Inventor: Ralf Reimelt
  • Publication number: 20140047917
    Abstract: A microwave window for the spatial, pressure-impervious and diffusion-impervious separation and microwave connection of a first space from/to a second space, and a level-measuring system that works according to the radar principle, is provided with a barrier that has two opposite sides and is at least partially permeable to microwaves. To provide a microwave window that makes possible a reliable sealing of a process space and exact measurement, the microwave window has the barrier designed as a disk on at least one side of which at least one plano-convex dielectric lens, which has an essentially homogenous body.
    Type: Application
    Filed: October 25, 2012
    Publication date: February 20, 2014
    Applicant: KROHNE MESSTECHNIK GMBH
    Inventors: Michael VOGT, Michael GERDING, Michael DEILMANN
  • Patent number: 8634787
    Abstract: Provision of gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for detection of amplitude-shift keyed (ASK) or other amplitude modulations (AM) which can be easily incorporated into an integrated circuit receiver system is described, making the receiver capable of supporting both complex IQ modulation schemes and simpler, non-coherent on-off or multiple-level keying signals. Several novel radio architectures are also described which, with the addition of a frequency discriminator network, have the capability of handling frequency shift keyed (FSK) or other frequency modulations (FM), as well as AM and complex IQ modulation schemes. These radio architectures support this wide variety of modulations by efficiently sharing detector hardware components.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: January 21, 2014
    Assignee: International Business Machines Corporation
    Inventors: Troy J. Beukema, Scott K. Reynolds
  • Patent number: 8634786
    Abstract: Provision of gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for detection of amplitude-shift keyed (ASK) or other amplitude modulations (AM) which can be easily incorporated into an integrated circuit receiver system is described, making the receiver capable of supporting both complex IQ modulation schemes and simpler, non-coherent on-off or multiple-level keying signals. Several novel radio architectures are also described which, with the addition of a frequency discriminator network, have the capability of handling frequency shift keyed (FSK) or other frequency modulations (FM), as well as AM and complex IQ modulation schemes. These radio architectures support this wide variety of modulations by efficiently sharing detector hardware components.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: January 21, 2014
    Assignee: International Business Machines Corporation
    Inventors: Troy J. Beukema, Scott K. Reynolds
  • Patent number: 8543079
    Abstract: Provision of gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for detection of amplitude-shift keyed (ASK) or other amplitude modulations (AM) which can be easily incorporated into an integrated circuit receiver system is described, making the receiver capable of supporting both complex IQ modulation schemes and simpler, non-coherent on-off or multiple-level keying signals. Several novel radio architectures are also described which, with the addition of a frequency discriminator network, have the capability of handling frequency shift keyed (FSK) or other frequency modulations (FM), as well as AM and complex IQ modulation schemes. These radio architectures support this wide variety of modulations by efficiently sharing detector hardware components.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: September 24, 2013
    Assignee: International Business Machines Corporation
    Inventors: Troy J. Beukema, Scott K. Reynolds
  • Publication number: 20130228011
    Abstract: A microwave window (1) for spatial separation and microwave connection of a first space (2) from or with a second space (3) having an at least partially microwave-transparent pane (8) with two sides (6, 7) opposing one another. To provide a microwave window, which allows for an alternative reduction of the reflection of waves, the pane (8) is provided with at least one indentation or recess (9) on at least one side (6). The window (1) is incorporated into a fill level measuring system (10) using the radar principle.
    Type: Application
    Filed: October 24, 2012
    Publication date: September 5, 2013
    Applicant: KROHNE MESSTECHNIK GMBH
    Inventors: Nils POHL, Michael DEILMANN, Michael GERDING
  • Publication number: 20130033343
    Abstract: A high power RF energy device component is disclosed that is exposed to high power RF energy in a vacuum environment, and includes a multipactor-inhibiting carbon nanofilm covering at least one surface of the component. A secondary electron efficiency (SEE) coefficient of the multipactor inhibiting carbon nanofilm is desirably less than a SEE coefficient of the underlying surface of the component.
    Type: Application
    Filed: December 28, 2011
    Publication date: February 7, 2013
    Applicant: NOKOMIS, INC.
    Inventors: Patrick J. Fisher, Walter J. Keller, III
  • Patent number: 8344626
    Abstract: The invention relates to a microwave output transition for a high-power electron tube comprising a body (78) of tubular shape, along a longitudinal axis ZZ?, having two ends (80, 90), a passage (79) between the two ends that has internal surfaces for propagating electromagnetic waves, one of the ends (90), in the form of a circular cylindrical tube, comprising a conical internal propagation surface (130) and the other end (80), in the form of a tube of rectangular cross section, having two long sides (84, 85) and two short sides (86, 87) perpendicular to the long sides, the passage having two plane internal propagation surfaces (120, 122) parallel to the long sides (84, 85) and two other plane internal surfaces (124, 126) parallel to the short sides (86, 87). Each of the plane internal propagation surfaces (120, 122) parallel to the long sides (84, 85) is joined to the conical internal propagation surface (130) via a respective curved connecting surface (132, 133) having bidirectional radii of curvature.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: January 1, 2013
    Assignee: Thales
    Inventors: Rodolphe Marchesin, David Bariou, Jean-Luc Piquet, Serge Agogue
  • Patent number: 8249542
    Abstract: This disclosure addresses providing gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for detection of amplitude-shift keyed (ASK) or other amplitude modulations (AM) which can be easily incorporated into an integrated circuit receiver system is described, making the receiver capable of supporting both complex IQ modulation schemes and simpler, non-coherent on-off or multiple-level keying signals. Several novel radio architectures are also described which, with the addition of a frequency discriminator network, have the capability of handling frequency shift keyed (FSK) or other frequency modulations (FM), as well as AM and complex IQ modulation schemes. These radio architectures support this wide variety of modulations by efficiently sharing detector hardware components.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: August 21, 2012
    Assignee: International Business Machines Corporation
    Inventors: Troy J. Beukema, Scott K. Reynolds
  • Patent number: 8237366
    Abstract: An output window for a vacuum electron device comprises an output waveguide, an intermediate layer of dielectric material joined to the interior of the output waveguide with a vacuum-tight seal, and upper and lower layers of dielectric material spaced apart from the intermediate layer and arranged above and below, respectively, the intermediate layer in a vertical orientation of the output waveguide. The upper and lower layers including openings. Supports extend inwardly into the output waveguide and support the upper and lower layers. Pillars extend through the openings in the lower layer and support the intermediate layer. The openings in the upper and lower layers permit a venting of a region between the upper layer and the intermediate layer and a region between the lower layer and the intermediate layer during the sealing of the intermediate layer while the intermediate layer is supported by the pillars.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: August 7, 2012
    Assignee: E2V Technologies (UK) Limited
    Inventors: Michael John Duffield, Richard John North
  • Patent number: 7944324
    Abstract: An orthomode transducer device (D), for an antenna, comprises (i) a main guide (GP) designed for the propagation along a main axis of first and second modes having polarizations orthogonal to each other and provided with a first end coupled to a circular port (AC) and a second end, (ii) a first auxiliary guide (GA1) designed for the propagation of the first mode along a first auxiliary axis and provided with a first end coupled in series to the second end of the main guide via a series window (FSP) and with a second end coupled to a series port (AS), and (iii) a second auxiliary guide (GA2) designed for the propagation of the second mode along a second auxiliary axis, coupled to the main guide via a parallel window (FPL) and provided with a first end coupled to a parallel port (AP). The first (GA1) and second (GA2) auxiliary guides are superposed.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: May 17, 2011
    Assignee: Thales
    Inventors: Thierry Girard, Harry Chane-Kee-Sheung, Pierre Bosshard, Laurence Laval
  • Publication number: 20100295636
    Abstract: The invention relates to a microwave output transition for a high-power electron tube comprising a body (78) of tubular shape, along a longitudinal axis ZZ?, having two ends (80, 90), a passage (79) between the two ends that has internal surfaces for propagating electromagnetic waves, one of the ends (90), in the form of a circular cylindrical tube, comprising a conical internal propagation surface (130) and the other end (80), in the form of a tube of rectangular cross section, having two long sides (84, 85) and two short sides (86, 87) perpendicular to the long sides, the passage having two plane internal propagation surfaces (120, 122) parallel to the long sides (84, 85) and two other plane internal surfaces (124, 126) parallel to the short sides (86, 87). Each of the plane internal propagation surfaces (120, 122) parallel to the long sides (84, 85) is joined to the conical internal propagation surface (130) via a respective curved connecting surface (132, 133) having bidirectional radii of curvature.
    Type: Application
    Filed: December 16, 2009
    Publication date: November 25, 2010
    Applicant: THALES
    Inventors: Rodolphe Marchesin, David Bariou, Jean-Luc Piquet, Serge Agogue
  • Publication number: 20100214043
    Abstract: A high peak and high average power-capable microwave/radio frequency window for use in rectangular or other waveguide transmission line geometries. The waveguide microwave window provides a physical barrier, or interface, between two regions on either side of the window. The window presents a relatively transparent interface for the microwave signal that is propagating in the waveguide. In an electrical sense the window will exhibit low return loss. The microwave window inhibits multipactor phenomena, suppresses electrical breakdown and transmits high peak power radio frequency signals. The microwave window also provides a mechanism for both passive and active cooling to allow operation at high average power. The applications for the claimed invention include use as part of: High Power Microwave (HPM) generators and systems; HPM sources and systems employed in and by particle accelerators; plasma processing systems; and numerous other applications that utilize high power microwave signals.
    Type: Application
    Filed: February 19, 2010
    Publication date: August 26, 2010
    Inventors: Clifton C. Courtney, Donald E. Voss
  • Publication number: 20100171423
    Abstract: An output window for a vacuum electron device comprises an output waveguide, an intermediate layer of dielectric material joined to the interior of the output waveguide with a vacuum-tight seal, and upper and lower layers of dielectric material spaced apart from the intermediate layer and arranged above and below, respectively, the intermediate layer in a vertical orientation of the output waveguide. The upper and lower layers including openings. Supports extend inwardly into the output waveguide and support the upper and lower layers. Pillars extend through the openings in the lower layer and support the intermediate layer. The openings in the upper and lower layers permit a venting of a region between the upper layer and the intermediate layer and a region between the lower layer and the intermediate layer during the sealing of the intermediate layer while the intermediate layer is supported by the pillars.
    Type: Application
    Filed: December 30, 2009
    Publication date: July 8, 2010
    Applicant: E2V Technologies (UK) Limited
    Inventors: Michael J. Duffield, Richard North
  • Patent number: 7741934
    Abstract: A device and method is provided that includes a window for coupling a signal between cavities of a device or between cavities of different devices. A wall or microstructure is formed on a surface and defines a cavity. The window is formed in the wall and comprises at least a portion of the wall and is electrically conductive. The cavity can be sized to resonate at various frequencies within the terahertz portion of the electromagnetic spectrum and generate an electromagnetic wave to carry the signal. The window allows surface currents to flow without disruption on the inside surface of the cavity.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: June 22, 2010
    Assignee: Virgin Islands Microsystems, Inc.
    Inventors: Jonathan Gorrell, Mark Davidson
  • Patent number: 7692125
    Abstract: An apparatus includes a radome and an evanescent wave-coupled windowing system in the radome. In operation, the apparatus receives radiation reflected from an object that is incident upon a windowing system; emits evanescent waves from the windowing system whose amplitudes are proportional to the angle of incidence of the radiation; and non-coherent, Fresnel direction finds the object.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: April 6, 2010
    Assignee: Lockheed Martin Corporation
    Inventor: Brett A. Williams
  • Patent number: 7688163
    Abstract: A pillbox vacuum window of the present invention has a first metal part and a second metal part. The first metal part includes a ceramic disk formed with a metallization layer in a peripheral area thereof, a larger diameter cylindrical portion, and a smaller diameter cylindrical portion having an inner diameter smaller than that of the larger diameter cylindrical portion, and coupled to the larger diameter cylindrical portion to form a step section at a joint, where the ceramic disk is fitted into the step section. The second metal part includes a cylindrical portion, where the cylindrical portion is inserted into the step section of the first metal part while the ceramic disk is placed in the step section of the first metal part.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: March 30, 2010
    Assignee: NEC Microwave Tube, Ltd.
    Inventor: Tetsuo Machida
  • Publication number: 20090174621
    Abstract: Methods and apparatus for a multilayer millimeter-wave window according to various aspects of the present invention operate in conjunction with a multilayer window that is substantially transparent to a passing millimeter-wave. The window may include multiple perforations in a thermally conductive element to be disposed in the path of the passing wave. A dielectric is positioned between each thermally conductive element and acts as a seal between wave source and an ambient environment. The window may also be configured to conform to a contoured surface or structure.
    Type: Application
    Filed: January 8, 2009
    Publication date: July 9, 2009
    Inventors: David Crouch, William E. Dolash
  • Patent number: 7545570
    Abstract: A system for selectively blocking electromagnetic energy. The system includes a first mechanism for employing a perforated component to pass a beam characterized by a first property and reject a beam characterized by a second property. A second mechanism selectively alters a beam passed by the first mechanism so that upon reflection, the beam exhibits the second property. In a specific embodiment, the first property corresponds to a first polarization, and the second property corresponds to a second polarization. In the specific embodiment, the perforated component includes a beamsplitter having a first perforated metallic plate. The second mechanism includes a quarter-wave plate having a second perforated metallic plate.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: June 9, 2009
    Assignee: Raytheon Company
    Inventor: David D. Crouch
  • Patent number: 7538640
    Abstract: A waveguide and an attenuation pole waveguide bandpass filter with a simple structure without any additional structure such as a negative cross coupling between resonators. The attenuation pole waveguide bandpass filter arranged at right angle to the longitudinal direction (radio wave propagation direction) is composed only of conductors. The conductor comprises depressions each opening outwardly and having a non-conducting region which continues from the inside of the opening section to the outside, and a window in the conductor section between these opposed depressions. In an alternative embodiment, such conductor shall be covered by a dielectric such as a resin.
    Type: Grant
    Filed: December 26, 2005
    Date of Patent: May 26, 2009
    Assignee: The Doshisha
    Inventors: Mikio Tsuji, Hiroyuki Deguchi, Masataka Ohira
  • Publication number: 20090028282
    Abstract: A system for fueling a plasma includes a gyrotron for radiating microwave energy into a waveguide. Also included is a module having a deuterium-tritium (DT) fuel pellet, a diamond, quartz or sapphire window, and a pusher medium located between the pellet and window that is made of frozen deuterium (D2) and metallic particles. With the module in the waveguide, the gyrotron is activated. Radiation from the gyrotron is then directed into the waveguide and through the window to cause the inducement of current in the metal particles, causing the particles to become hot. The absorbed microwave energy is then transferred to the pusher medium by conduction resulting in a gaseous expansion of the pusher medium. This ejects the pellet from the waveguide and into the plasma.
    Type: Application
    Filed: May 12, 2008
    Publication date: January 29, 2009
    Inventor: Paul B. Parks
  • Patent number: 7417376
    Abstract: An electron beam tube device such as an inductive output tube of the integral cavity type has a RF window which re-enters the interaction space within the cavity thereby defining a space that is within the interaction cavity but is outside the vacuum. An output coupler in the form of an output coupling loop protrudes into this space and thus couples with the electromagnetic field within the interaction space, whilst remaining outside the vacuum envelope. This allows the coupling loop to be adjusted without any additional seal arrangement between the coupling loop and walls of the output cavity.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: August 26, 2008
    Assignee: E2V Technologies (UK) Limited
    Inventor: Steven Aitken
  • Patent number: 7365620
    Abstract: An RF feed-through connector has a single pin or multi-pins supported and hermetically sealed between a first portion of the connector facing the hermetically sealed interior portion of an electronics-containing housing and a second portion of the connector exposed to ambient conditions in which the electronics-containing housing is placed. The invention is particularly directed to a new hermetically sealed RF feed-through connector architecture in which the connector's outer shell contains a relatively low coefficient of thermal expansion (CTE) portion that enables it to be soldered to a low CTE insert that supports one or more hermetically sealed longitudinal signal pins. The connector's outer shell also includes a relatively high CTE portion that allows the shell to be readily joined as by welding to an adjacent support structure, such as a relatively high CTE aluminum housing and the like.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: April 29, 2008
    Assignees: SRI Hermetics, Inc.
    Inventor: Edward Allen Taylor
  • Publication number: 20070241845
    Abstract: A pillbox vacuum window of the present invention has a first metal part and a second metal part. The first metal part includes a ceramic disk formed with a metallization layer in a peripheral area thereof, a larger diameter cylindrical portion, and a smaller diameter cylindrical portion having an inner diameter smaller than that of the larger diameter cylindrical portion, and coupled to the larger diameter cylindrical portion to form a step section at a joint, where the ceramic disk is fitted into the step section. The second metal part includes a cylindrical portion, where the cylindrical portion is inserted into the step section of the first metal part while the ceramic disk is placed in the step section of the first metal part.
    Type: Application
    Filed: April 11, 2007
    Publication date: October 18, 2007
    Applicant: NEC MICROWAVE TUBE, LTD.
    Inventor: Tetsuo MACHIDA
  • Patent number: 7204140
    Abstract: The present invention relates to a radar level measuring device for non-contact measurement of a level of a product in a container. The device comprises a flange which is mounted on the container in such a way that a lead-through of the flange at least partly covers an opening in the container. The device further comprises a waveguide part, insertable into the flange. When inserted, the insertable waveguide part is arranged to come to a stop at a distance (D) from the surface of the flange intended to face the container, along which distance (D), a waveguide is formed, forming a continuous waveguide together with the insertable waveguide part when inserted.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: April 17, 2007
    Assignee: Saab Rosemount Tank Radar AB
    Inventors: Johan Källsand, Magnus Ohlsson, Magnus Håkansson
  • Patent number: 7102584
    Abstract: A process control instrument comprises a control for generating or receiving a high frequency signal. A waveguide comprises a cylindrical housing closed at one end by a rear wall. A loop launcher is operatively connected to the control and comprises a wire having a first straight leg electrically connected at one end to the control and extending into the waveguide a first select length. A second straight leg is connected at one end to the rear wall and extends into the waveguide a second select length, greater than the first select length. A curved middle section connects the other ends of the first and second straight legs. An antenna is operatively coupled to the waveguide.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: September 5, 2006
    Assignee: Magnetrol International, Inc.
    Inventors: Paul G. Janitch, John S. Benway, Stephen A. Reynolds, Stanislaw Bleszynski
  • Patent number: 7049909
    Abstract: The invention relates to microwave windows used for providing a vacuum seal and transmitting the electromagnetic energy output by a high-power microwave tube. The window comprises a dielectric disk and a prestressing ring, placed around the periphery of the disk, exerts, when at rest, a radial compressive stress all around the disk. In practice, the disk is brazed to the inside of a metal skirt, and the prestressing ring is an annular portion of a holder used for rigidly fastening the microwave window to an output of the microwave tube. The annular portion has an increased thickness and bears locally on the skirt around the disk. The disk may be made of alumina, the metal skirt made of copper, and the holder made of stainless steel. The resistance of the window to thermal stresses is considerably improved thereby.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: May 23, 2006
    Assignee: Thales Electron Devices S.A.
    Inventors: Philippe Denis, Edmond Boghossian
  • Patent number: 6965287
    Abstract: A microwave window for transmitting microwave radiation includes a solid body and a flange. The solid body includes a first surface and a second surface spaced apart from each other in a first direction thereby defining a thickness of the solid body in the first direction. The flange is disposed at a periphery of the solid body such that a peripheral portion of the solid body extends a length into the flange in a second direction perpendicular to the first direction. The thickness and the length are selected such that the power of reflections of microwave radiation by the microwave window are no more than about ten times the power of reflections at the minimum value.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: November 15, 2005
    Assignee: Tokyo Electron Limited
    Inventor: Andrej S. Mitrovic
  • Patent number: 6864471
    Abstract: A plurality of slots are provided so as to be located between a thin plate flexible opening section screen member and a heating chamber wall surface 1 for allowing insertion of the opening section screen member. A gently-curved bulging surface exists in an area where the heating chamber wall surface 1 and the opening section screen member 5 are mated together. As a result, residual warpage which would otherwise remain when the opening section screen member is warped for attachment becomes invisible, thereby preventing occurrence of clearance, which would cause sparking or the like.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: March 8, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshio Mitsumoto, Takahide Yamaguchi
  • Patent number: 6844798
    Abstract: A device for efficient transmission of electromagnetic waves comprising two layers of dielectric separated by a gap or space. The layers may be uniform or laminar, orthogonal or non-orthogonal to the direction of wave propagation, and made of Teflon, quartz, polypropylene, and the like. The preferred distance between layers is an odd multiple of quarter wavelength in the environment between the layers. The preferred thickness of the layers is an odd multiple of half of the effective wavelength for the layer. The device allows over 95% efficiency for transmission into a pressurized vessel for evaporation under high pressure and temperature and does not require a cooling system. The separating space may be connected with a pressure-sensing subsystem to monitor the device's integrity and shut down the system in the event of a breach. A sleeve connecting the device to the vessel may be coated with conductive material for improved efficiency.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: January 18, 2005
    Assignee: Praxair Technology, Inc.
    Inventors: Prasad Apte, Wendell W. Isom, Michael M. Litwin
  • Publication number: 20040095215
    Abstract: A device for efficient transmission of electromagnetic waves comprising two layers of dielectric separated by a gap or space. The layers may be uniform or laminar, orthogonal or non-orthogonal to the direction of wave propagation, and made of Teflon, quartz, polypropylene, and the like. The preferred distance between layers is an odd multiple of quarter wavelength in the environment between the layers. The preferred thickness of the layers is an odd multiple of half of the effective wavelength for the layer. The device allows over 95% efficiency for transmission into a pressurized vessel for evaporation under high pressure and temperature and does not require a cooling system. The separating space may be connected with a pressure-sensing subsystem to monitor the device's integrity and shut down the system in the event of a breach. A sleeve connecting the device to the vessel may be coated with conductive material for improved efficiency.
    Type: Application
    Filed: November 19, 2002
    Publication date: May 20, 2004
    Applicant: Praxair, Inc.
    Inventors: Prasad Apte, Wendell W. Isom, Michael M. Litwin
  • Publication number: 20040080387
    Abstract: The invention relates to microwave windows used for providing a vacuum seal and for transmitting the electromagnetic energy output by a high-power microwave tube.
    Type: Application
    Filed: December 9, 2003
    Publication date: April 29, 2004
    Inventors: Philippe Denis, Edmond Boghossian