Patents Examined by Rakesh Patel
  • Patent number: 10224588
    Abstract: A multiplex filter has at least n filter chambers which are surrounded by a housing and/or at least one insert positioned in the housing. A metal dividing device is constructed in each of the n filter chambers, dividing each filter chamber into m resonator chambers, wherein m?2. The resonator chambers are coupled perpendicular to the H fields and/or parallel to the central axis or with a component essentially perpendicular to the H fields and/or parallel to the central axis. A common connection is guided into the first filter chamber via a first opening in the housing, and is coupled in the same to the m resonators of the m resonator chambers. As a result of the fact that the coupling is established perpendicular to the H field, the resonator can have a very compact construction.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: March 5, 2019
    Assignee: Kathrein SE
    Inventor: Frank Weiβ
  • Patent number: 10218259
    Abstract: In a power converter having a semiconductor switch, common-mode noise is effectively reduced by setting the common-mode inductance value of reactors which are inserted into both lines such that the resonance frequency of the combined capacity of a line-to-ground bypass capacitor and the reactors which are inserted into both lines becomes a predetermined value or more.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: February 26, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuro Fujiwara, Keita Takahashi
  • Patent number: 10218332
    Abstract: A matching circuit provides broadband impedance matching of first and second devices for processing RF signals in a broadband frequency range, the first device being inherently capacitive. The matching circuit includes a shunt inductor that transforms impedance of the first device to matching impedance at a matching resonance frequency in a middle portion of the broadband frequency range, and a series resonance circuit that has a series resonance frequency approximately the same as the matching resonance frequency. The series resonance circuit includes an inductor and a capacitor connected in series to the first device, and further transforms the matching impedance of the first device and the shunt inductor to a design matching impedance corresponding to the broadband frequency range. One end of the shunt inductor is connected to the first device, between the series resonance circuit and the first device or to an opposite side of the first device.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: February 26, 2019
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Martin Fritz, Hongya Xu, Usman Javaid, Jonathan Bamford
  • Patent number: 10211504
    Abstract: A radio frequency transmission arrangement comprises a ground plate having an aperture comprising a slot with an elongate cross-section and substantially parallel sides, and a first and second transmission line. The thickness of the ground plate is greater than a width of the slot. The first transmission line comprises a first elongate conductor on a first side of the ground plate and has an end terminated with a first termination stub. The second transmission line comprises a second elongate conductor on the opposite side of the ground plate and has an end terminated with a second termination stub. The first transmission line is arranged to cross the slot at a point adjacent to the first termination stub, and the second transmission line is arranged to cross the slot at a point adjacent to the second termination stub.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 19, 2019
    Assignee: CAMBIUM NETWORKS LIMITED
    Inventors: Peter Strong, Adam Wilkins, Carl Morrell, Paul Clark, Nigel Jonathan Richard King
  • Patent number: 10211501
    Abstract: A high-frequency filter consists of a housing, which includes resonators, each of which has at least one dielectric. The n resonators are arranged along a central axis. The n resonators are isolated from one another by at least n?1 isolation devices. The n?1 isolation devices have coupling openings, through which a coupling is established at a right angle to or with one component predominantly at a right angle to the H field. A first signal line terminal is inserted into the first resonator chamber through a first opening in the housing and is in contact with the respective dielectric there. In addition or alternatively, a second signal line terminal is inserted into the nth resonator chamber through a second opening in the housing and is in contact with the respective dielectric there.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: February 19, 2019
    Assignee: Kathrein SE
    Inventor: Frank Weiß
  • Patent number: 10211499
    Abstract: The present invention discloses a four-mode defected ground structure resonator, comprising a metal dielectric substrate and a defected ground unit which is etched in one surface of the metal dielectric substrate; the shape of the defected ground unit is axially symmetric about a first central axis of the defected ground unit, and also the shape of the defected ground unit is axially symmetric about a second central axis of the defected ground unit; the first defected ground unit is provided with H-shape or quasi H-shape, the second defected ground unit is provided with L-shape, quasi L-shape, U-shape or quasi U-shape. The four-mode defected ground structure resonator of the present invention is provided with four types of resonant modes, and the four types of resonant modes are provided with good tunability.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: February 19, 2019
    Assignee: QINDAO HAIER ELECTRONICS CO., LTD.
    Inventors: Biao Peng, Shufang Li, Shuai Wang, Ling Wang, Yili Zhai, Xijia Hu
  • Patent number: 10205209
    Abstract: A triple-band bandpass filter with at least one cavity resonator. Each cavity resonator has the same three orthogonal resonances modes corresponding to three unique resonance frequencies. The three unique resonance frequencies define the passbands of the filter. The filter has an input probe coupled to an input cavity resonator. The filter has an output probe coupled to an output cavity resonator. The input and output probes are shaped to concurrently couple signal waveforms in each of the resonance modes. Coupling probes that can be used as input or output probes are also provided. An inter-cavity coupling operable to concurrently transmit signal waveforms in each of the resonance modes is also provided. The inter-cavity coupling can be used to transmit signals between adjacent cavity resonators in the filter.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: February 12, 2019
    Assignee: COM DEV LTD.
    Inventors: Li Zhu, Ming Yu, Raafat R. Mansour
  • Patent number: 10205436
    Abstract: Embodiments of an acoustic wave filter system that includes at least one acoustic wave filter and acoustic wave tuning control circuitry are disclosed. The acoustic wave filter includes at least one acoustic wave resonator and defines a passband. To provide tuning for calibration or for dynamic filter operation, the acoustic wave tuning control circuitry is configured to bias one or more of the acoustic wave resonators with bias voltages. Biasing an acoustic wave resonator affects the resonances of the resonator, thereby allowing for the passband of the acoustic wave resonator to be tuned. Accordingly, the acoustic wave tuning control circuitry is configured to adjust the bias voltages so that the acoustic wave filter shifts the passband. In this manner, the passband of the acoustic wave filter can be tuned with high degree of accuracy and without requiring physical alterations to the acoustic wave resonators.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: February 12, 2019
    Assignee: Qorvo US, Inc.
    Inventors: Baker Scott, Robert Aigner, Gernot Fattinger, George Maxim, Dirk Robert Walter Leipold, Nadim Khlat
  • Patent number: 10200086
    Abstract: Aspects of the subject disclosure may include, for example, identifying a device coupled to a transmission medium that obstructs a propagation of guided electromagnetic waves propagating on an outer surface of the transmission medium when the device is subjected to a liquid, and applying a material to a portion of the device to mitigate the obstruction. Other embodiments are disclosed.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: February 5, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Donald J. Barnickel, Farhad Barzegar, Robert Bennett, Irwin Gerszberg, Paul Shala Henry, Thomas M. Willis, III
  • Patent number: 10199704
    Abstract: A method for compensating a temperature drift of a microwave filter comprises: measuring a first frequency response of a microwave filter at a first temperature; determining values of elements of an equivalent circuit corresponding to the microwave filter such that a first modelled frequency response computed using the equivalent circuit matches the first measured frequency response to obtain a first model modelling the microwave filter at the first temperature: measuring a second frequency response of the microwave filter at a second temperature; determining values of elements of the equivalent circuit corresponding to the microwave filter anew such that a second modelled frequency response computed using the equivalent circuit matches the second measured frequency response to obtain a second model modelling the microwave filter at the second temperature; and adjusting an overall temperature drift of the microwave filter to adjust the temperature drifts of the resonant filter elements.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: February 5, 2019
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Roman Tkadlec, Frantisek Hrnicko, Gabriel Toth
  • Patent number: 10200006
    Abstract: Apparatus and method for a radially attachable RF trap attached from a side to a shielded RF cable. In some embodiments, the RF trap creates a high impedance on the outer shield of the RF cable at a frequency of RF signals carried on at least one inner conductor of the cable. In some embodiments, an RF-trap apparatus for blocking stray signals on a shielded RF cable that has a peripheral shield conductor and a inner conductor for carrying RF signals includes: a case; an LC circuit having a resonance frequency equal to RF signals carried on the inner conductor; projections that pierce and connect the LC circuit to the shield conductor; and an attachment device that holds the case to the cable with the LC circuit electrically connected to the shield conductor of the shielded RF cable.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 5, 2019
    Assignee: Life Services, LLC
    Inventors: Matthew T. Waks, Scott M. Schillak, Charles A. Lemaire
  • Patent number: 10200007
    Abstract: A filter chip includes a substrate, a plurality of external terminals formed on the substrate for external connection, and a plurality of passive element forming regions provided in the regions between the plurality of external terminals in plan view when viewed along a direction normal to the surface of the substrate, the plurality of passive element forming regions including at least a resistor forming region where a resistor is formed. The resistor forming region includes a resistive conductive film formed on the substrate with one end and the other end thereof electrically connected to different ones of the external terminals, and a fuse portion integrally formed with the resistive conductive film. The fuse portion is cuttably provided to electrically connect a part of the resistive conductive film to the external terminals, or to electrically separate a part of the resistive conductive film from the external terminals.
    Type: Grant
    Filed: July 16, 2016
    Date of Patent: February 5, 2019
    Assignee: ROHM CO., LTD.
    Inventors: Keisuke Fukae, Yasuhiro Kondo, Katsuya Matsuura, Hiroyuki Okada, Junya Yamagami
  • Patent number: 10193596
    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: March 6, 2018
    Date of Patent: January 29, 2019
    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: 10193518
    Abstract: First no-electrode-forming areas where first wiring electrodes such as internal wiring electrodes and external connection terminals are not formed are set to ranges that overlap inductor components in a plan view of at least one of dielectric layers of a first substrate, and second no-electrode-forming areas where second wiring electrodes such as internal wiring electrodes and mounting electrodes are not formed are set to ranges that overlaps the inductor components in a plan view of at least one of dielectric layers of a second substrate. Accordingly, reduction of the inductance of the inductor components, which is caused by the first and second wiring electrodes crossing the magnetic field of the inductor components, can be suppressed. Therefore, the overall component size can be reduced without deteriorating the Q value of the inductor components by configuring an RF component with a stacking structure.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: January 29, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Seigo Hino
  • Patent number: 10186743
    Abstract: The microstrip circuits exhibiting electromagnetically induced transparency and Fano resonance include a microstrip transmission line and at least two identical parallel quarter-wavelength open stubs extending from the transmission line in close proximity so that mutual coupling between the electromagnetic fields at adjacent ends of the stubs induces Faro resonances and electromagnetically induced transparency (EIT). The circuits may be used for microwave buffers, or when a variable capacitance, such as a varactor, is inserted between the open ends of the stubs, the circuits may be used for active transmission phase control.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: January 22, 2019
    Assignee: United Arab Emirates University
    Inventors: Rashad Ramzan, Muhammad Amin, Omar Farooq Siddiqui, Nabil Bastaki
  • Patent number: 10187028
    Abstract: In one aspect, the present disclosure provides a surface-mounted low-pass filter, including: a mounting surface having an input terminal electrode, an output terminal electrode, and a ground terminal electrode; a parallel resonant circuit between the input terminal electrode and the output terminal electrode; and a series resonant circuit between one end of the parallel resonant circuit and the ground terminal electrode, wherein the series resonant circuit has a first capacitor and a first inductor, and wherein, when the low-pass filter is viewed from above in a direction perpendicular to the mounting surface with the mounting surface on the bottom, the first inductor of the series resonant circuit is above the first capacitor.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: January 22, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventor: Hirotaka Takeuchi
  • Patent number: 10186744
    Abstract: The microstrip Fano resonator switch is a microstrip circuit having a varactor diode electrically connected between identical quarter-wavelength open stubs formed from two elongate planar strip elements disposed on a substrate having a permittivity of approximately 2.94 and a thickness of approximately 0.76 mm, the circuit forming a Fano resonator switch that provides approximately 50 dB of isolation.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: January 22, 2019
    Assignee: United Arab Emirates University
    Inventors: Rashad Ramzan, Muhammad Amin, Omar Farooq Siddiqui, Nabil Bastaki
  • Patent number: 10181626
    Abstract: A filter including a resonator formed of metal and including a first through hole in one direction, and a transmission line penetrating through the first through hole, wherein the transmission line is spaced apart from the first through hole.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: January 15, 2019
    Assignee: INNERTRON, INC.
    Inventors: Hyo Chul Kim, Tae Jin Jeong
  • Patent number: 10177458
    Abstract: A radio system includes: a radio device; an antenna device; and a polarization converting circuit for changing the directions of polarized waves, inserted at a position between the radio device and the antenna device. The polarization converting circuit is installed inside a holder in a device interface portion, and the device interface portion has a through hole that penetrates from the outer wall of the device interface portion to the outer periphery of the polarization converting circuit and is used to confirm the rotating angle of the polarization converting circuit inside the holder.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: January 8, 2019
    Assignee: NEC Corporation
    Inventor: Yoshihide Takahashi
  • Patent number: 10178762
    Abstract: A device, in particular a pre-assembled transmission cable, is used to transmit differential data signals in a high-speed data connection. The device contains a circuit board with a conductor pair with two signal conductors for transmitting the differential data signal. An output line which is insulated from the conductor pair is paired with the conductor pair, the output line running parallel to the signal conductors in a non-interrupted manner and additionally being connected to a measuring conductor via at least one damping element. By virtue of the configuration, an undesired common-mode signal component is at least partly coupled into the output line, where the signal component is absorbed during operation.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: January 8, 2019
    Assignee: LEONI Kabel Holding GmbH
    Inventors: Bernd Janssen, Christoph Untiedt, Hergen Blessen