Circular Or Helical Structure Patents (Class 333/242)
  • Patent number: 10374319
    Abstract: Aspects of the subject disclosure may include, for example, a transmission device that includes a transmitter that generates a first electromagnetic wave to convey data. A coupler couples the first electromagnetic wave to a single wire transmission medium having an outer surface, to forming a second electromagnetic wave that is guided to propagate along the outer surface of the single wire transmission medium via at least one guided wave mode that includes an asymmetric or non-fundamental mode having a lower cutoff frequency. A carrier frequency of the second electromagnetic wave is selected to be within a limited range of the lower cutoff frequency, so that a majority of the electric field is concentrated within a distance from the outer surface that is less than half the largest cross sectional dimension of the single wire transmission medium, and/or to reduce propagation loss. Other embodiments are disclosed.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: August 6, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Robert Bennett, Irwin Gerszberg, Farhad Barzegar, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 10326494
    Abstract: Aspects of the subject disclosure may include, a transmission medium having a first end configured to be coupled to a first port of the launching device, wherein electromagnetic waves are induced by the launching device on a surface of the transmission medium, wherein the electromagnetic waves are bound to the surface of the transmission medium, and wherein the electromagnetic waves propagate without requiring an electrical return path to a second end of the transmission medium. A short circuit, coupled to the second end of the transmission medium, reflects the electromagnetic waves back to the first end of the transmission medium for reception by the launching device as reflected electromagnetic waves at the first port to facilitate a de-embedding of the launching device. Other embodiments are disclosed.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: June 18, 2019
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Harold Rappaport, Farhad Barzegar, Irwin Gerszberg, Paul Shala Henry
  • Patent number: 10270181
    Abstract: Aspects of the subject disclosure may include, for example, a transmission device that includes a transmitter that generates a first electromagnetic wave to convey data. A coupler couples the first electromagnetic wave to a single wire transmission medium having an outer surface, to forming a second electromagnetic wave that is guided to propagate along the outer surface of the single wire transmission medium via at least one guided wave mode that includes an asymmetric or non-fundamental mode having a lower cutoff frequency. A carrier frequency of the second electromagnetic wave is selected to be within a limited range of the lower cutoff frequency, so that a majority of the electric field is concentrated within a distance from the outer surface that is less than half the largest cross sectional dimension of the single wire transmission medium, and/or to reduce propagation loss. Other embodiments are disclosed.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: April 23, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Robert Bennett, Irwin Gerszberg, Farhad Barzegar, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 10249960
    Abstract: The present invention relates to a distributed antenna system for transmitting and/or receiving radio frequency, RF, signals, wherein said antenna system comprises at least one elliptical waveguide which comprises a plurality of openings. The present invention further relates to a method of manufacturing a distributed antenna system of the aforementioned type.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: April 2, 2019
    Assignee: Alcatel Lucent
    Inventors: Alexander Thomas, Erhard Mahlandt
  • Patent number: 10224587
    Abstract: The present disclosure provides systems and methods associated with mode conversion for electromagnetic field modification. A mode converting structure (holographic metamaterial) is formed with a distribution of dielectric constants chosen to convert an electromagnetic radiation pattern from a first mode to a second mode to attain a target electromagnetic radiation pattern that is different from the input electromagnetic radiation pattern. A solution to a holographic equation provides a sufficiently accurate approximation of a distribution of dielectric constants that can be used to form a mode converting device for use with one or more transmission lines, such as waveguides. One or more optimization algorithms can be used to improve the efficiency of the mode conversion.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: March 5, 2019
    Assignee: Elwha LLC
    Inventors: Tom Driscoll, John Desmond Hunt, Nathan Ingle Landy, David R. Smith, Yaroslav A. Urzhumov
  • Patent number: 10069537
    Abstract: Aspects of the subject disclosure may include, for example, a coupling device including a receiving portion that receives a radio frequency signal conveying data from a transmitting device. A magnetic coupler magnetically couples the radio frequency signal to a transmission medium as a guided electromagnetic wave that is bound by an outer surface of the transmission medium. Other embodiments are disclosed.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: September 4, 2018
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Robert Bennett, Paul Shala Henry, Irwin Gerszberg, Farhad Barzegar, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 10033107
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by a feed point of a dielectric antenna, electromagnetic waves from a dielectric core coupled to the feed point without an electrical return path, where at least a portion of the dielectric antenna comprises a conductive surface, directing, by the feed point, the electromagnetic waves to a proximal portion of the dielectric antenna, and radiating, via an aperture of the dielectric antenna, a wireless signal responsive to the electromagnetic waves being received at the aperture. Other embodiments are disclosed.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: July 24, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Donald J Barnickel, Farhad Barzegar, Robert Bennett, Irwin Gerszberg, Thomas M. Willis, III
  • Patent number: 9948354
    Abstract: Aspects of the subject disclosure may include, for example, a coupling device including a receiving portion that receives a radio frequency signal conveying data from a transmitting device. A magnetic coupler magnetically couples the radio frequency signal to a transmission medium as a guided electromagnetic wave that is bound by an outer surface of the transmission medium. A cap includes a dielectric portion that secures the transmission medium adjacent to the magnetic coupler and a reflective plate that reduces electromagnetic emissions from the magnetic coupler. Other embodiments are disclosed.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: April 17, 2018
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Robert Bennett, Irwin Gerszberg, Paul Shala Henry, Farhad Barzegar, Donald J Barnickel, Thomas M. Willis, III
  • Patent number: 9856730
    Abstract: In one embodiment of the invention, an air drilling downhole telemetry and control system is disclosed, comprising a telemetry and control interface, a topside unit, one or more repeater units, a bottom hole unit, and an air filled drill string composed of a drill pipe acting as a circular waveguide, wherein the topside unit is disposed at the surface end of the drill string, the repeater units are disposed along the drill string, and the bottom hole unit is disposed at the terminal end of the drill string, and each unit is a communications node along a communications link existing between the telemetry and control interface and the bottom hole unit. Each unit comprises a communications subsystem, a power subsystem, and optionally a telemetry and control subsystem. The communications subsystem contains a message buffer system capable of temporarily storing communications during a communications link disruption event.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: January 2, 2018
    Assignee: Altan Technologies Inc.
    Inventors: Wayne Butner, Michael P. Sanders
  • Patent number: 9793954
    Abstract: Aspects of the subject disclosure may include, for example, a coupling device including a receiving portion that receives a radio frequency signal conveying data from a transmitting device. A magnetic coupler magnetically couples the radio frequency signal to a transmission medium as a guided electromagnetic wave that is bound by an outer surface of the transmission medium. Other embodiments are disclosed.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: October 17, 2017
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Robert Bennett, Paul Shala Henry, Irwin Gerszberg, Farhad Barzegar, Donald J Barnickel, Thomas M. Willis, III
  • Patent number: 9627768
    Abstract: Aspects of the subject disclosure may include, for example, a transmission device that includes a transmitter that generates a first electromagnetic wave to convey data. A coupler couples the first electromagnetic wave to a single wire transmission medium having an outer surface, to forming a second electromagnetic wave that is guided to propagate along the outer surface of the single wire transmission medium via at least one guided wave mode that includes an asymmetric or non-fundamental mode having a lower cutoff frequency. A carrier frequency of the second electromagnetic wave is selected to be within a limited range of the lower cutoff frequency, so that a majority of the electric field is concentrated within a distance from the outer surface that is less than half the largest cross sectional dimension of the single wire transmission medium, and/or to reduce propagation loss. Other embodiments are disclosed.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: April 18, 2017
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Paul Shala Henry, Robert Bennett, Irwin Gerszberg, Farhad Barzegar, Donald J Barnickel, Thomas M. Willis, III
  • Patent number: 9413074
    Abstract: A method and an arrangement for modeling antenna emission characteristics are disclosed. A slotted microwave waveguide is implemented by separate mechanical modules having slot groups respectively implemented therein. For this purpose, the modules are arranged along at least one first spatial direction, so that the modules sectionally form a part of the delimitation of the waveguide. The waveguide formed can be fed by exciting a waveguide mode and the mode propagates through the interior of the module in the waveguide formed. Screens are arranged in front of the modules, to partially cover the slot groups. Arbitrary emission characteristics can be simulated, wherein no separate feed network is necessary due to the use of a modular waveguide.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: August 9, 2016
    Assignee: Technische Universitat Braunshweig
    Inventors: Achim Enders, Robert Geise
  • Patent number: 9225052
    Abstract: A radio frequency (RF) transmission-line structure includes a parallel-plate transmission line formed from a first conducting plate and a second conducting plate. The second conducting plate is spaced apart from the first conducting plate and substantially parallel to the first conducting plate. A support member is attached to the first and second plates and is operative to maintain a fixed mechanical spacing between the first conducting plate and the second conducting plate. The transmission-line structure further includes at least one feature configured to isolate or suppress RF interaction of the support member with RF fields within the parallel-plate transmission line.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: December 29, 2015
    Assignee: ThinKom Solutions, Inc.
    Inventors: William Milroy, James Sor
  • Patent number: 9163615
    Abstract: A tubular device including a tubular having a continuous wall and a substantially constant inner radial dimension and an outer surface that varies in radial dimensions configured to lessen a reduction in a longitudinal dimension of the tubular in response to radial expansion of the tubular in comparison to a reduction in the longitudinal dimension of a constantly-dimensioned-inner-and-outer-radially-surfaced-tubular made of a same material as the tubular.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: October 20, 2015
    Assignee: Baker Hughes Incorporated
    Inventor: Jeffrey Charles Williams
  • Publication number: 20150028972
    Abstract: This application is directed to an apparatus for creating microwave radiation patterns for an object detection system. The apparatus includes a waveguide conduit having first slots at one side of the conduit and corresponding second slots at an opposite side of the conduit. The waveguide conduit is coupled to a microwave source for transmitting microwaves from the microwave source through the plurality of first slots. A plunger is moveably positioned in the waveguide conduit from one end thereof. The plunger allows the waveguide conduit to be tuned to generally optimize the power of the microwaves exiting the first slots. Secondary plungers are each fitted in one of the second slots to independently tune or detune microwave emittance through a corresponding first slot.
    Type: Application
    Filed: July 25, 2014
    Publication date: January 29, 2015
    Inventor: Peter F. Vandermeulen
  • Publication number: 20140145894
    Abstract: The corrugated component for the transmission and manipulation of electromagnetic signals with frequency up to several THz, comprises an assembly of a plurality of plates stacked together in a hollow guiding rod wherein said plates have at least one aperture of alternating diameter to form a slot or a ridge in alternate fashion, wherein the external shape of said plates corresponds to the internal shape of the hollow guiding rod. The invention also concerns a method for assembling such a corrugated component.
    Type: Application
    Filed: September 1, 2011
    Publication date: May 29, 2014
    Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
    Inventor: Alessandro Macor
  • Publication number: 20140077729
    Abstract: An RF generator has a hollow conductor having a conductive wall. The wall has a first slot, over which a first solid-state switch is arranged in order to apply a radiofrequency electrical voltage through the first slot.
    Type: Application
    Filed: October 13, 2011
    Publication date: March 20, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Oliver Heid, Timothy Hughes
  • Patent number: 8564385
    Abstract: A radio frequency source includes a coaxial non-linear transmission line. The coaxial non-linear transmission line may include a closed, non-magnetic, cylindrical outer conductor defining a cavity therein; and a plurality of stages enclosed by the outer conductor. Each stage may then includes an axial field solenoid wound about the outer conductor; a non-magnetic, cylindrical inner conductor disposed within the cavity and coaxially aligned with the outer conductor; a plurality of cylindrical ferrite switch elements, each defining a respective bore through which the inner conductor runs; and a plurality of inner and outer cups coaxially aligned with the inner and outer conductors, each defining a respective bore through which the inner conductor runs.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: October 22, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Michael C. Scott, Steve E. Calico, Chris E. Williams
  • Patent number: 8390402
    Abstract: A waveguide is provided that includes an elongate dielectric inner region, and an electrically conducting outer region spaced apart from the dielectric inner region. The dielectric inner region may be arranged to be flexible, and in some examples may be formed from powdered dielectric contained in a polymer tube or matrix, or in other examples may be formed from a plurality of segments. In some examples of the waveguide, each segment may be formed to have lenticular end faces, and may be formed from sintered BaTi4O9.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: March 5, 2013
    Assignee: Astrium Limited
    Inventor: Mark Anthony Kunes
  • Patent number: 8330372
    Abstract: A rapidly twisted electromagnetic accelerating structure includes a waveguide body having a central axis, one or more helical channels defined by the body and disposed around a substantially linear central axial channel, with central portions of the helical channels merging with the linear central axial channel. The structure propagates electromagnetic waves in the helical channels which support particle beam acceleration in the central axial channel at a phase velocity equal to or slower than the speed of light in free space. Since there is no variation in the shape of the transversal cross-section along the axis of the structure, inexpensive mechanical fabrication processes can be used to form the structure, such as extrusion, casting or injection molding. Also, because the field and frequency of the resonant mode depend on the whole structure rather than on dimensional tolerances of individual cells, no tuning of individual cells is needed.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: December 11, 2012
    Assignee: UT-Battelle, LLC
    Inventors: Yoon W. Kang, Aly E. Fathy, Joshua L. Wilson
  • Patent number: 8179213
    Abstract: Provided is an electromagnetic wave transmission medium which is suited for mass production and does not affect a transmission mode. The electromagnetic wave transmission medium includes, as a main element, a flexible cylindrical tube (1) molded so that a cross-sectional shape of the cylindrical tube in a direction orthogonal to a tube axis is uniform in a direction of the tube axis. The cylindrical tube (1) includes an inner wall formed of a conductive layer having a thickness equal to or more than a skin depth. The cross-sectional shape is a circular ridge waveguide shape having a ridge (1b) which is oriented to a cylindrical axis and is symmetric with respect to a center, and the ridge (1b) has a structure to be fed with electricity.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: May 15, 2012
    Assignee: Yokowo Co., Ltd
    Inventors: Wasuke Yanagisawa, Hiroshi Mizutani, Yasunobu Ishii, Mitsuhiro Suzuki, Ryo Horie
  • Patent number: 8119709
    Abstract: An acoustic (sound or ultrasound) wave transmitter having a plurality of waveguides is described, and a method of making such a transmitter is described. Each waveguide can have a cladded core. The cladded core is capable of transmitting acoustic wave energy from a first end surface to a second end surface of the cladded core. The waveguides can be substantially fixed relative to each other by a binder. The binder can be formed by fusing the claddings together, potting a material between the waveguides and/or mechanically holding the waveguides.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: February 21, 2012
    Assignee: Ultra-Scan Corporation
    Inventors: John K. Schneider, Jack C. Kitchens
  • Publication number: 20110285479
    Abstract: A rapidly twisted electromagnetic accelerating structure includes a waveguide body having a central axis, one or more helical channels defined by the body and disposed around a substantially linear central axial channel, with central portions of the helical channels merging with the linear central axial channel. The structure propagates electromagnetic waves in the helical channels which support particle beam acceleration in the central axial channel at a phase velocity equal to or slower than the speed of light in free space. Since there is no variation in the shape of the transversal cross-section along the axis of the structure, inexpensive mechanical fabrication processes can be used to form the structure, such as extrusion, casting or injection molding. Also, because the field and frequency of the resonant mode depend on the whole structure rather than on dimensional tolerances of individual cells, no tuning of individual cells is needed.
    Type: Application
    Filed: May 21, 2010
    Publication date: November 24, 2011
    Inventors: Yoon W. Kang, Aly E. Fathy, Joshua L. Wilson
  • Patent number: 7915980
    Abstract: A communication device consistent with certain implementations has a coaxial cable having length and first and second ends. The coaxial cable further has a central conductor, a dielectric insulator surrounding the central conductor, and an electric shield conductor surrounding the dielectric insulator. The dielectric insulator serves as a dielectric waveguide having a characteristic impedance Z at an operating frequency range. A termination for electrical energy coupled into or out of the dielectric insulator at approximately the characteristic impedance Z at the operating frequency range to utilize the dielectric insulator as a waveguide for transmission of signals along the length of the coaxial cable, and wherein the center conductor is further used to communicate an electrical signal between the first and second ends. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: March 29, 2011
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Robert Allan Unger, Robert L. Hardacker, Christopher Jensen Read
  • Publication number: 20100060389
    Abstract: An acoustic (sound or ultrasound) wave transmitter having a plurality of waveguides is described, and a method of making such a transmitter is described. Each waveguide can have a cladded core. The core can be a liquid such as water, alcohol or mineral oil. Alternatively, the core can be a colloidal gel, such as gelatin dissolved in at least one of water, vinyl plastisol or silicone gel. The cladded core is capable of transmitting acoustic wave energy from a first end surface to a second end surface of the cladded core. The waveguides can be substantially fixed relative to each other by a binder. The binder can be formed by fusing the claddings together, potting a material between the waveguides and/or mechanically holding the waveguides.
    Type: Application
    Filed: September 4, 2009
    Publication date: March 11, 2010
    Inventors: John K. Schneider, Jack C. Kitchens
  • Publication number: 20100052827
    Abstract: An acoustic (sound or ultrasound) wave transmitter having a plurality of waveguides is described, and a method of making such a transmitter is described. Each waveguide can have a cladded core. The cladded core is capable of transmitting acoustic wave energy from a first end surface to a second end surface of the cladded core. The waveguides can be substantially fixed relative to each other by a binder. The binder can be formed by fusing the claddings together, potting a material between the waveguides and/or mechanically holding the waveguides.
    Type: Application
    Filed: September 8, 2009
    Publication date: March 4, 2010
    Inventors: John K. Schneider, Jack C. Kitchens
  • Publication number: 20100001809
    Abstract: Provided is an electromagnetic wave transmission medium which is suited for mass production and does not affect a transmission mode. The electromagnetic wave transmission medium includes, as a main element, a flexible cylindrical tube (1) molded so that a cross-sectional shape of the cylindrical tube in a direction orthogonal to a tube axis is uniform in a direction of the tube axis. The cylindrical tube (1) includes an inner wall formed of a conductive layer having a thickness equal to or more than a skin depth. The cross-sectional shape is a circular ridge waveguide shape having a ridge (1b) which is oriented to a cylindrical axis and is symmetric with respect to a center, and the ridge (1b) has a structure to be fed with electricity.
    Type: Application
    Filed: July 2, 2009
    Publication date: January 7, 2010
    Applicant: YOKOWO CO., LTD.
    Inventors: Wasuke YANAGISAWA, Hiroshi MIZUTANI, Yasunobu ISHII, Mitsuhiro SUZUKI, Ryo HORIE
  • Patent number: 7612638
    Abstract: A waveguide in semiconductor integrated circuit is disclosed, the waveguide comprises a horizontal first metal plate, a horizontal second metal plate above the first metal plate, separated by an insulation material, and a plurality of metal vias positioned in two parallel lines, running vertically through the insulation material in contacts with both the first and second metal plates, wherein the first and second metal plates and the plurality of metal vias form a metal enclosure in a cross-sectional view that can serve as a waveguide.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: November 3, 2009
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Shine Chung, Fu-Lung Hsueh
  • Publication number: 20090231066
    Abstract: The present invention is based on the technical problem of specifying a transmission element, using which a permanent nondetachable connection is producible employing an axial pressing technique using simple means. The technical problem is solved by a transmission element for workpiece connections to be axially compressed, with a flange section and with a transmission section. The transmission section exhibits a substantially cylindrical internal peripheral surface, and the wall thickness of the transmission section tapers from the end proximal to the flange section up to the end distal to the flange section.
    Type: Application
    Filed: February 18, 2009
    Publication date: September 17, 2009
    Applicant: Viega GmbH & Co. KG
    Inventors: Christian Rischen, Sudi Sinoplu
  • Patent number: 7589470
    Abstract: A method and apparatus for producing a distributed plasma at atmospheric pressure. A distributed plasma can be produced at atmospheric pressure by using an inexpensive high frequency power source in communication with a waveguide having a plurality particularly configured couplers disposed therein. The plurality of particularly arranged couplers can be configured in the waveguide to enhance the electromagnetic field strength therein. The plurality of couplers have internal portions disposed inside the waveguide and spaced apart by a distance of ½ wavelength of the high frequency power source and external portions disposed outside the waveguide and spaced apart by a predetermined distance which is calculated to cause the electromagnetic fields in the external portions of adjacent couplers to couple and thereby further enhance the strength of the electromagnetic field in the waveguide. Plasma can be formed in plasma areas defined by gaps between electrodes disposed on the external portions.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: September 15, 2009
    Assignee: Dublin City University
    Inventors: Lutfi Oksuz, Albert Rogers Ellingboe
  • Patent number: 7339447
    Abstract: The present invention relates to a high-voltage transformer coil with acoustic wave guiding function, which comprises a plurality of wound wires, an insulated material for packaging said wound wires to form a coil, a high-voltage connector formed on a side of said coil, and at least one wave guide formed on the other side of said coil to transmit acoustic waves generated due to discharge. The high-voltage coil for transmitting acoustic wave of the present invention is particularly suitable for cast resin transformers.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: March 4, 2008
    Assignees: Unelectra International Corp., Precision International Corp.
    Inventors: Jiann-Fuh Chen, Cheng-Chi Tai, Tsorng-Juu Liang, Ching-Chau Su, Ching-Shun Yi, Chien-Yi Chen
  • Patent number: 7218190
    Abstract: Waveguides and scattering devices are made from a pair of slabs, at least one slab being either an “epsilon-negative (ENG)” layer in which the real part of permittivity is assumed to be negative while its permeability has positive real part, or a “mu-negative (MNG)” layer that has the real part of its permeability negative but its permittivity has positive real part. The juxtaposition and pairing of such ENG and MNG slabs under certain conditions lead to some unusual features, such as resonance, complete tunneling, zero reflection and transparency. Such materials also may be configured to provide guided modes in a waveguide having special features such as mono-modality in thick waveguides and the presence of TE modes with no cut-off thickness in thin parallel-plate waveguides. Using equivalent transmission-line models, the conditions for the resonance, complete tunneling and transparency are described as well as the field behavior in these resonant paired structures.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: May 15, 2007
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Nader Engheta, Andrea Alù
  • Patent number: 6816042
    Abstract: An “inside out” process is used to make RF antennas and components or higher frequency components and/or optics. An electroformed single or multi layer of metal, such as copper, is applied to a reusable or disposable mandrel. Additional metal or composite components and/or pieces may be attached to the electroform by means of further electroforming, and/or applying adhesive and/or soldering. Any composite material (for example, fiberglass or carbon fiber reinforced plastic) is then applied selectively or uniformly around the electroform and/or additional components for structural reinforcement, and/or enhancement of thermal stability and/or thermal conductivity. The mandrel is then removed by physical or chemical means. Adhesion over temperature and humidity extremes, surface finish, uniform metalization thickness, and surface electrical conductivity are all vastly improved over equivalent electroplated composites.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: November 9, 2004
    Assignees: Applied Aerospace Structures Corp., Custom Microwave Inc.
    Inventors: Michael J. Noyes, Lee Mancheong Edouard Lee-Yow
  • Patent number: 6702591
    Abstract: An interface assembly, which may be used with a current mode data bus, couples to an existing current mode data bus and includes a length of unshielded data bus disposed on a printed circuit board. A plurality of coupler magnetic assemblies are disposed on the circuit board and interface with the unshielded portion of the data bus. A corresponding plurality of coupler circuits are disposed on the circuit board and each cooperate with an associated one of the coupler magnetic assemblies. Providing all of the coupler magnetic assemblies and coupler circuits on the printed circuit board reduces the susceptibility of the unshielded data bus portion to EMI and enables more consistent data channel characteristics to be achieved. An alternative embodiment includes an entire current mode data bus formed on a printed circuit board with terminators at each end of an unshielded portion of the data bus.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: March 9, 2004
    Assignee: The Boeing Company
    Inventors: Wayne A. Edwards, Theodore C. Ebbinga
  • Patent number: 6559742
    Abstract: A flexible waveguide has a flexible wall enclosing an elongated cylindrical passage for transmission of an electromagnetic wave along the passage. A succession of corrugations is disposed along an interior surface of the wall facing the passage. The corrugations are spaced apart by a distance less than approximately 0.2 wavelength of the electromagnetic wave, each of the corrugations having a height greater than the distance but less than approximately 0.5 wavelength of the electromagnetic wave, and each corrugation having a curved surface to minimize loss in the transmission of the electromagnetic wave.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: May 6, 2003
    Assignee: Space Systems/Loral, Inc.
    Inventors: Slawomir J. Fiedziuszko, George A. Fiedziuszko
  • Patent number: 6130587
    Abstract: An isolator/circulator can keep a size of a 3-way asymmetric propeller resonator and intensity of magnetism, control the preferred frequency, and improve the insertion loss and isolation characteristic due to reducing the ferrite usage region on the maximum, extend the wide band without the external wide band extension, finally to miniaturize, reduce the fabricating cost by means of a simple fabrication. A microstrip/stripline isolator/circulator having a propeller resonator can be used for the device protection and impedance matching of a system and terminal in a transfer communication, personal communication, CT and satellite communication.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: October 10, 2000
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong Suk Jun, Meyung Soo Kim, Bon Hee Koo, Chang Hwa Lee, Sang Seok Lee, Tae Goo Choy
  • Patent number: 6124770
    Abstract: An expandable resin composition comprising(A) HDPE (high density polyethylene);(B) a high pressure, low density homopolymer of ethylene (HP-LDPE);(C) polypropylene;(D) a polysiloxane-polyether block copolymer; and(E) a nucleating agent of azodicarbonamide and/or talc.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: September 26, 2000
    Assignee: Nippon Unicar Company Limited
    Inventors: Toshio Sakamoto, Koji Ishihara, Takashi Furukawa
  • Patent number: 6121851
    Abstract: A non-reciprocal circuit element for transmitting a high-frequency signal of microwave band in one direction. The electrical characteristics of the non-reciprocal circuit element have been improved by using an insulating sheet having a thickness within a specific range thereby to regulate the distance between vertically adjacent strip electrodes within a specific range. Also, the product-to-product variation in the electrical characteristics of the non-reciprocal circuit element has been minimized by shaping the end portion of the strip electrode so as to extend in coplanar relationship to the top surface of the capacitor to be connected.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: September 19, 2000
    Assignee: Hitachi Metals Ltd.
    Inventors: Shinji Takane, Ryouji Matsumoto
  • Patent number: 6118352
    Abstract: A description is given of a microwave component which includes a microwave conductor arrangement for conducting electromagnetic waves and a gyromagnetic material which is provided in operative contact with the electromagnetic waves and can be subjected to a magnetic field of adjustable field strength in that the gyromagnetic material, at least one magnet for generating the magnetic field, and a magnetic tuning member, whose magnetic conductivity can be varied in order to adjust the magnetic field strength, are arranged in a magnetic circuit.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: September 12, 2000
    Assignee: U.S. Philips Corporation
    Inventor: Ralf Wendel
  • Patent number: 6118349
    Abstract: A nonreciprocal circuit device requires less layout space when single-board capacitors are used, and meets demands for a smaller and lighter configuration. An isolator (nonreciprocal circuit device) comprises a ferrite, a permanent magnet applying a direct current magnetic field to the ferrite, a plurality of central electrodes respectively having ports disposed on the ferrite and a single-board matching capacitor with capacitor electrodes formed on both surfaces of a dielectric substrate such that the capacitor electrodes are opposed to each other and sandwich the dielectric substrate. In various embodiments, the permanent magnet and/or the ferrite has a square shape and the capacitor electrodes of the matching capacitors are arranged at an angle of 60 to 90 degrees with respect to a mounting surface and the matching capacitors are disposed so as to surround the sides of the ferrite.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: September 12, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takekazu Okada, Toshihiro Makino, Akihito Masuda, Takashi Kawanami
  • Patent number: 6097261
    Abstract: A microwave component is described with a microwave guiding arrangement for conducting electromagnetic waves and with a gyromagnetic material which is arranged in operational connection with the electromagnetic waves and which can be energized by a magnetic field of adjustable field strength in that the gyromagnetic material, at least one magnet for generating the magnetic field, and a geometrically changeable magnetic tuning element are arranged in a magnetic circuit, said tuning element having a changeable magnetic permeance for the purpose of tuning the magnetic field strength.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: August 1, 2000
    Assignee: U.S. Philips Corporation
    Inventor: Ralf Wendel
  • Patent number: 6087905
    Abstract: A nonreciprocal circuit device which can achieve miniaturization and cost reduction by increasing attenuation outside a passband and greatly decreasing the occurrence of extraneous radiation emissions.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: July 11, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Toshihiro Makino, Takashi Kawanami, Takashi Hasegawa
  • Patent number: 6052044
    Abstract: A waveguide for high power radio frequency transmission, comprising a tubular member having an ellipsoidal cross section and relatively uniform wall thickness having a ratio of major to minor axes between about 1.5 to 2.0 and a minimum minor axis of about 20 cm.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: April 18, 2000
    Assignee: MYAT, Inc.
    Inventor: Donald Aves
  • Patent number: 6046651
    Abstract: A microwave component is described with a substantially tub-shaped housing part which comprises a bottom portion and at least one wall portion merging into the circumference of the bottom portion, and with a lid part, said housing part and lid part being formed from a magnetically permeable material and enclosing an inner space in which a number of substantially disc-shaped components are provided in a stacked arrangement between the bottom portion and the lid part such that a partial space of the inner space adjoining at least a sub-portion of the bottom portion is left open by the stacked arrangement.A compact construction benefiting miniaturization is obtained in this microwave component in spite of the accommodation of a bulky load impedance.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: April 4, 2000
    Assignee: U.S. Philips Corporation
    Inventor: Ralf Wendel
  • Patent number: 6041219
    Abstract: A printed circuit board (PCB) transceiver I/O filter design which provides both polarization and isolation filtering includes a receive probe positioned in a first orientation in an opening of the PCB which has a feed waveguide attached to it on a first side of the PCB. Receive signals propagate into the feed waveguide and excite the probe causing the receive probe to couple the received signals to receive circuitry. The transceiver design further includes an enclosed waveguide structure attached to the PCB having a first end positioned over the PCB opening and a second end positioned over a transmit probe which is positioned in a second orientation orthogonal to the receive probe. The transmit probe is excited by transmit circuitry and couples signals into the waveguide structure through the PCB opening and out the feed waveguide.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: March 21, 2000
    Assignee: Wytec, Incorporated
    Inventor: Dean F. Peterson
  • Patent number: 6037844
    Abstract: In the disclosed nonreciprocal circuit device, which employs a single-board-type capacitor, the problem of electrode peeling can be avoided. The nonreciprocal circuit device has characteristics such that attenuation is small in the direction of signal transmission and attenuation is large in the reverse direction and has matching capacitors disposed in signal input/output ports. The matching capacitors are formed of single-board-type capacitors including capacitor electrodes formed so as to be opposed each other on both main surfaces of a dielectric substrate with the substrate in between. An outer peripheral edge of a grounding electrode (or another connected electrode), to which a capacitor electrode of the single-board-type capacitor is connected, is positioned inwardly from an outer peripheral edge of the capacitor electrode.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: March 14, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Toshihiro Makino, Akihito Masuda, Takashi Kawanami
  • Patent number: 6025759
    Abstract: Disclosed is a surface mounting type isolator, which comprises: ferrite 1 having an internal magnetic field so as to render an external magnetic field unnecessary; ceramic substrate 5 into which ferrite 1 is inserted; full-surface grounding conductor 7 disposed on one surface of ceramic substrate 5; branch lines 2, 3 disposed on the other surface of ceramic substrate 5, branch lines 2,3 being connected to two input/output terminals 11, 12; connecting portion 4 disposed on ferrite 1 and connected to branch lines 2, 3; and terminating resistor 6 connected to connecting portion 4.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: February 15, 2000
    Assignee: NEC Corporation
    Inventor: Kuniharu Takahashi
  • Patent number: 6020793
    Abstract: A non-reciprocal circuit device has a plurality of central conductors arranged so as to intersect mutually on a magnetic substance to which a d.c. magnetic field is applied, and matching capacitors connected between the ports of the central conductors and ground. In the non-reciprocal circuit device an inductor is connected between at least one port of the central conductor and the signal-input/output terminal corresponding thereto, to modify the frequency response characteristics thereof.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: February 1, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Toshihiro Makino, Takashi Kawanami
  • Patent number: 6011449
    Abstract: A structure for a passive microwave device. The structure includes a housing having circumferential side portions and selectively located openings in the side portions. In addition, electrical conductors for the passive device extend from the openings. The structure further includes substantially rigid supports which provide structural support for the conductors. The conductors are positioned above the supports and are electrically connected to contacts which are secured in apertures formed in the supports. A dielectric material is disposed on a perimeter of each of the contacts which serves to isolate each of the contacts from the support when the contact is positioned within the aperture.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: January 4, 2000
    Assignee: The Whitaker Corporation
    Inventors: Raymond Gerard Jussaume, Stanley Vincent Paquette
  • Patent number: 5994974
    Abstract: The intersection angle formed by the central conductor connected to an input port and the central conductor connected to an output port is set to more than 120 degrees, preferably about 130 to 150 degrees, for example 140 degrees. The central conductor connected to a terminating port preferably bisects the above-described intersection angle and may be set to either 110 degrees or 70 degrees, for example. The resistance of a terminating resistor connected to the terminating port is set to about 200 to 500 .OMEGA., for example 300 .OMEGA..
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: November 30, 1999
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Toshihiro Makino, Hiroki Dejima, Takashi Kawanami