Patents by Inventor Duixian Liu

Duixian Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130069831
    Abstract: Systems, methods, devices and apparatuses directed to transceiver devices are disclosed. In accordance with one method, a first set of antenna positions in a first section of a set of sections of a circuit layout for the circuit package is selected. The method further includes selecting another set of antenna positions in another section of the circuit layout such that an arrangement of selected antenna positions of the other set is different from an arrangement of selected antenna positions of a previously selected set of antenna positions. The selecting another set of positions in another section is iterated until selections have been made for a total number of antennas. The selecting the other set is performed such that consecutive unselected positions in the other section do not exceed a predetermined number of positions. In addition, antenna elements are formed at the selected positions to fabricate the circuit package.
    Type: Application
    Filed: February 13, 2012
    Publication date: March 21, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: DANIEL J. FRIEDMAN, Duixian Liu, Arun S. Natarajan, Scott K. Reynolds, Alberto Valdes Garcia
  • Patent number: 8378469
    Abstract: Apparatus and methods are provided for integrally packaging antennas with semiconductor IC (integrated circuit) chips to provide highly-integrated and high-performance radio/wireless communications systems for millimeter wave applications including, e.g., voice communication, data communication, and radar applications. For example, wireless communication modules are constructed with IC chips having receiver/transmitter/transceiver integrated circuits and planar antennas that are integrally constructed from BEOL (back end of line) metallization structures of the IC chip.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: February 19, 2013
    Assignee: International Business Machines Corporation
    Inventors: Brian P. Gaucher, Duixian Liu, Ullrich R. Pfeiffer, Thomas M. Zwick
  • Publication number: 20130027244
    Abstract: Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.
    Type: Application
    Filed: August 31, 2012
    Publication date: January 31, 2013
    Applicant: International Business Machines Corporation
    Inventors: Aydin Babakhani, Duixian Liu, Scott K. Reynolds, Mihai A. Sanduleanu
  • Publication number: 20130027243
    Abstract: Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.
    Type: Application
    Filed: July 10, 2012
    Publication date: January 31, 2013
    Applicant: International Business Machines Corporation
    Inventors: Aydin Babakhani, Duixian Liu, Scott K. Reynolds, Mihai A. Sanduleanu
  • Publication number: 20130027271
    Abstract: Array packages and methods for forming large-scale antenna arrays. One method includes aligning two or more array packages. The two or more array packages each include one or more bottom dielectric layers, an array of antennas arranged in a plane above the one or more bottom dielectric layers, a ground plane layer above the one or more bottom dielectric layers, and a conductive surface on at least a part of an outside surface of the array package and orthogonal to the plane of the array of antennas. The conductive surface is electrically connected to the ground plane layer.
    Type: Application
    Filed: July 27, 2011
    Publication date: January 31, 2013
    Applicant: International Business Machines Corporation
    Inventors: Dong G. Kam, Duixian Liu, Scott K. Reynolds
  • Publication number: 20130016023
    Abstract: Apparatus and methods are provided for integrally packaging antennas with semiconductor IC (integrated circuit) chips to provide highly-integrated and high-performance radio/wireless communications systems for millimeter wave applications including, e.g., voice communication, data communication, and radar applications. For example, wireless communication modules are constructed with IC chips having receiver/transmitter/transceiver integrated circuits and planar antennas that are integrally constructed from BEOL (back end of line) metallization structures of the IC chip.
    Type: Application
    Filed: July 30, 2007
    Publication date: January 17, 2013
    Inventors: Brian P. Gaucher, Duixian Liu, Ullrich R. Pfeiffer, Thomas M. Zwick
  • Patent number: 8294620
    Abstract: Dual-band antennas that are embedded within portable devices such as laptop computers. In one aspect, a dual-band antenna for a portable device (e.g., laptop computer) includes a first element having a resonant frequency in a first frequency band and a second element having a resonant frequency in a second frequency band, wherein the first element is connected to a signal feed, wherein the second element is grounded, and wherein the first and second elements are integrated within a portable device.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: October 23, 2012
    Assignee: Lenovo (Singapore) Pte Ltd.
    Inventors: Ephraim B. Flint, Brian P. Gaucher, Duixian Liu
  • Patent number: 8269671
    Abstract: A radio-frequency integrated circuit chip package has N integrated patch antennas, N being at least one. The package includes a cover portion with N generally planar patches, and a main portion coupled to the cover portion. The main portion in turn includes at least one generally planar ground plane spaced inwardly from the N generally planar patches and parallel thereto. The ground plane is formed without any coupling apertures therein. The main portion also includes N feed lines spaced inwardly from the N generally planar patches and parallel thereto, and spaced outwardly from the generally planar ground plane and parallel thereto. Furthermore, the main portion includes at least one radio frequency chip coupled to the feed lines and the ground plane. The cover portion and the main portion cooperatively define an antenna cavity, and the N generally planar patches and the chip are located in the antenna cavity. The package is formed without reflectors. Fabrication techniques are also described.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: September 18, 2012
    Assignees: International Business Machines Corporation, Media Tek
    Inventors: Ho Chung Chen, Brian A. Floyd, Duixian Liu
  • Patent number: 8256685
    Abstract: A radio-frequency integrated circuit chip package has at least one integrated antenna. The package includes at least one generally planar ground plane formed with at least one slot therein. A first substrate structure has an outer surface and an inner surface. The at least one generally planar ground plane is formed on the outer surface of the first substrate structure. At least one feed line is spaced inwardly from the ground plane and parallel thereto. The at least one feed line has an inner surface and an outer surface and is a transmission line formed on the inner surface of the first substrate structure with the outer surface of the at least one feed line adjacent the inner surface of the first substrate structure. At least one radio frequency chip is coupled to the feed line and the ground plane. A second substrate structure, spaced inwardly from the feed line, defines a chip-receiving cavity. The chip is located in the chip-receiving cavity.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 4, 2012
    Assignees: International Business Machines Corporation, Mediatek
    Inventors: Ho Chung Chen, Brian A. Floyd, Duixian Liu
  • Publication number: 20120212384
    Abstract: A chip package includes a plurality of layers including conductive planes connected by vias. The layers include a first portion having an antenna formed therein and a parallel-plate mode suppression mechanism to suppress parallel-plate mode excitation of the antenna. The parallel-plate mode suppression mechanism includes a reflector offset from an antenna ground plane and first grounded vias. A second portion has an interface for connecting to an integrated circuit device wherein the first portion and the second portion are separated by the parallel-plate mode suppression mechanism.
    Type: Application
    Filed: February 17, 2011
    Publication date: August 23, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: DONG G. KAM, Duixian Liu, Scott K. Reynolds
  • Publication number: 20120188138
    Abstract: Apparatus and methods for packaging IC chips and laminated antenna structures with laminated waveguide structures that are integrally constructed as part of an antenna package to form compact integrated radio/wireless communications systems for millimeter wave applications.
    Type: Application
    Filed: January 21, 2011
    Publication date: July 26, 2012
    Applicant: International Business Machines Corporation
    Inventor: Duixian Liu
  • Publication number: 20120176281
    Abstract: Apparatus and methods are provided for integrally packaging semiconductor IC (integrated circuit) chips with antennas having one or more radiating elements and tuning elements that are formed from package lead wires that are appropriated shaped and arranged to form antenna structures for millimeter wave applications.
    Type: Application
    Filed: March 19, 2012
    Publication date: July 12, 2012
    Applicant: International Business Machines Corporation
    Inventors: Brian P. Gaucher, Duixian Liu, Ullrich R. Pfeiffer, Thomas M. Zwick
  • Patent number: 8212341
    Abstract: Apparatus and methods are provided for integrally packaging semiconductor IC (integrated circuit) chips with antennas having one or more radiating elements and tuning elements that are formed from package lead wires that are appropriated shaped and arranged to form antenna structures for millimeter wave applications.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: July 3, 2012
    Assignee: International Business Machines Corporation
    Inventors: Brian P. Gaucher, Duixian Liu, Ullrich R. Pfeiffer, Thomas M. Zwick
  • Publication number: 20120146845
    Abstract: A frequency modulation continuous wave (FMCW) system includes a first memory receiving a clock signal and storing voltage digital values of I FMCW signals, a second memory receiving the clock signal and storing the voltage digital values of the Q FMCW signals, a first digital-to-analog converter (DAC) connected to the first memory and receiving the clock signal for converting the voltage digital values of the I FMCW signal to a first analog voltage, a second digital-to-analog converter (DAC) connected to the second memory and receiving the clock signal for converting the voltage digital values of the Q FMCW signal to a second analog voltage, an I low-pass filter connected to the first DAC smoothing the I FMCW signal and a Q low-pass filter connected to the second DAC smoothing the Q FMCW signal.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 14, 2012
    Applicant: International Business Machines Corporation
    Inventors: Howard H. Chen, Kai D. Feng, Duixian Liu
  • Publication number: 20120063094
    Abstract: Techniques provide improved thermal interface material application in an assembly associated with an integrated circuit package. For example, an apparatus comprises an integrated circuit module, a printed circuit board, and a heat transfer device. The integrated circuit module is mounted on a first surface of the printed circuit board. The printed circuit board has at least one thermal interface material application via formed therein in alignment with the integrated circuit module. The heat transfer device is mounted on a second surface of the printed circuit board and is thermally coupled to the integrated circuit module. The second surface of the printed circuit board is opposite to the first surface of the printed circuit board.
    Type: Application
    Filed: September 15, 2010
    Publication date: March 15, 2012
    Applicant: International Business Machines Corporation
    Inventors: Michael A. Gaynes, Dong G. Kam, Duixian Liu, Scott K. Reynolds
  • Publication number: 20110279190
    Abstract: A circuit device includes a multilayer circuit carrier, a first signal transmission line, a second signal transmission line, a signal line transition element, a first impedance transformer, and a second impedance transformer. The multilayer circuit carrier includes a first layer and a second layer. The first signal transmission line is on the surface of the first layer. The second signal transmission line is on the surface of the second layer. The signal line transition element passes through the first layer and the second layer, and has a first signal terminal and a second signal terminal. The first impedance transformer is on the surface of the first layer and electrically connected between the first signal transmission line and the first signal terminal. The second impedance transformer is on the surface of the second layer and electrically connected between the second signal transmission line and the second signal terminal.
    Type: Application
    Filed: May 12, 2010
    Publication date: November 17, 2011
    Inventors: Duixian Liu, Ho-Chung Chen, Brian Allan Floyd
  • Publication number: 20110254727
    Abstract: An apparatus, imager elements, and a method for detecting a radio frequency image using phased array techniques. An example apparatus includes an array of radio frequency antennas fabricated on one or more packaged integrated circuits. The apparatus also includes a controller configured to selectively phase shift radio frequency signals from the antennas such that the at least a portion of the radio frequency image is focused.
    Type: Application
    Filed: October 5, 2010
    Publication date: October 20, 2011
    Applicant: International Business Machines Corporation
    Inventors: Dong G. Kam, Duixian Liu, Arun S. Natarajan, Scott K. Reynolds, Alberto Valdes Garcia
  • Patent number: 8018384
    Abstract: In an illustrative embodiment, an apparatus includes at least one antenna structure located on a first surface of a first substrate; at least one pad located on the first surface of the first substrate; and at least one via traversing the first substrate and thereby connecting the at least one pad located on the first surface of the first substrate to at least one pad located on a second surface. The at least one pad located on the first surface of the first substrate is operatively coupleable to at least one pad located on a surface of an integrated circuit and the at least one pad located on the second surface is operatively coupleable to at least one pad located on a surface of a printed circuit board. The at least one via is thereby operative to couple the at least one pad located on the surface of the integrated circuit and the at least one pad located on the surface of the printed circuit board.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: September 13, 2011
    Assignee: International Business Machines Corporation
    Inventors: Brian Allan Floyd, Duixian Liu, Robert M. Morton
  • Patent number: 7999753
    Abstract: Antennas are provided which are constructed using one or more conductive via stubs as radiating elements formed in a substrate. The antennas can be integrally packaged with IC chips (e.g., IC transceivers, receivers, transmitters, etc.) to build integrated wireless or RF (radio frequency) communications systems.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: August 16, 2011
    Assignee: International Business Machines Corporation
    Inventors: Brian Paul Gaucher, Duixian Liu, Ullrich Richard Rudolf Pfeiffer, Thomas Martin Zwick
  • Patent number: 7952531
    Abstract: A planar circularly polarized antenna comprises at least one coplanar waveguide feed line and a plurality of driven loops electrically connected to the feed line, wherein the driven loops and the feed line are substantially coplanar. At least one of the plurality of driven loops may be of a size different from at least another one of the plurality of driven loops and at least one of the plurality of driven loops may have a resonant frequency different from at least another one of the plurality of driven loops.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: May 31, 2011
    Assignee: International Business Machines Corporation
    Inventor: Duixian Liu