Patents by Inventor Tzung-I Lee

Tzung-I Lee 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).

  • Patent number: 9698857
    Abstract: Antenna structures and methods of operating the same of an electronic device are described. One apparatus includes an antenna element that is self-resonant at a first frequency in a first mode and self-resonant at a second frequency in a second mode. A radio frequency (RF) is coupled between the antenna element and a ground plane. A RF circuit, coupled to the antenna element via an RF feed, is operable to control the RF switch to switch the antenna element between the first mode and the second mode. The RF circuit is operable to cause the antenna element to radiate or receive electromagnetic energy in a first radiation pattern in the first mode and to radiate or electromagnetic energy in a second radiation pattern in the second mode.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: July 4, 2017
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Koohyun Um, In Chul Hyun, Mercyma Deeba Balachandran
  • Patent number: 9484631
    Abstract: Antenna structures and methods of operating the same of an electronic device are described. One apparatus includes a single radio frequency (RF) feed and a folded monopole element coupled to the single RF feed. The folded monopole element is an integrated WAN/GNSS antenna that receives electromagnetic energy in a first frequency band and receives electromagnetic energy in a second frequency band. The first frequency band is a wireless area network (WAN) frequency band and the second frequency band is a global navigation satellite system (GNSS) frequency band. The apparatus further includes an impedance matching circuit coupled to the single RF feed. The impedance matching circuit includes a diplexer to extract out GNSS frequency signals received by the folded monopole element from WAN signals received by the folded monopole element.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: November 1, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Adrian Napoles, Ulf Jan Ove Mattsson, Anuj Dron, Tzung-I Lee, Daejoung Kim, Morris Yuanhsiang Hsu, Seng Chin Tai
  • Patent number: 9431717
    Abstract: Antenna structures and methods of operating the same of a wideband dual-arm antenna of an electronic device are described. One wideband antenna includes a first feeding arm coupled to a radio frequency (RF) feed and a second feeding arm coupled to the RF feed. At least a portion of the second feeding arm is parallel to the first feeding arm. The wideband dual-arm antenna further includes a third arm coupled to the ground plane. The third arm is a parasitic ground element that forms a coupling to the first feeding arm and the second feeding arm. The parasitic element increases a bandwidth of the wideband antenna.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: August 30, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, In Chul Hyun, Adrian Napoles
  • Patent number: 9391362
    Abstract: Antenna structures and methods of operating the same of a configurable antenna of an electronic device are described. A configurable antenna includes a first antenna element coupled to a radio frequency (RF) feed, a controllable circuit coupled to the first antenna element and a second antenna element coupled to the controllable circuit. The controllable circuit is configured to electrically isolate the first antenna element and the second antenna element to configure the antenna structure to operate in a first antenna configuration having a first length and to electrically connect the first antenna element and the second antenna element to configure the antenna structure to operate in a second antenna configuration having a second length.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: July 12, 2016
    Assignee: Amazon Technolgoies, Inc.
    Inventors: Cheol Su Kim, In Chul Hyun, Tzung-I Lee
  • Patent number: 9369165
    Abstract: Embodiments of the subject technology provides a novel approach to address desense and provide electrostatic discharge (ESD) protection among components for a collocated antenna and speaker configuration in a mobile computing device. The available metal around the periphery of speaker components are used as part of implementing an antenna(s) and also for tuning the antenna, which results in an efficient antenna design that can be implemented within an available (relatively small) area of a PCB and also without adding components, which could further increase the overall cost of the mobile computing device. An inductor is used to isolate the antenna away from a ground to mitigate desense for the antenna. The inductor is connected to a diode and capacitor in series. The diode provides ESD protection for the speaker. The capacitor is connected to the diode in parallel to shunt nonlinearities generated by the diode to ground.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: June 14, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Amit Shailesh Gaikwad, Tzung-I Lee
  • Patent number: 9331835
    Abstract: Radio frequency (RF) front-end circuitry and methods of operating the same are described. One apparatus includes multiple antennas and a RF front-end circuitry. The RF front-end circuitry includes: a selection switch coupled to a second antenna, a first RF transceiver coupled to a first antenna and selectively coupled to the second antenna via the selection switch; a second RF receiver coupled to the first antenna; and a third RF transceiver selectively coupled to the second antenna via the selection switch. The first antenna receives signals for the first RF transceiver and the second RF receiver. The selection switch selectively couples the second antenna to the first RF transceiver in a first mode of the RF front-end circuitry and selectively couples the second antenna to the third RF transceiver in a second mode of the RF front-end circuitry.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: May 3, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-i Lee, Varadarajan Gopalakrishnan, Cheol Su Kim, In Chul Hyun
  • Patent number: 9246215
    Abstract: Antenna structures of electronic devices and methods of operating the electronic devices with the antenna structures are described. One apparatus includes a RF feed coupled to a split-feed antenna element of an antenna structure. The antenna structure also includes a parasitic grounding element coupled to a ground plane. The split-feed antenna element is configured to operate as a feeding structure to the parasitic grounding element that is not conductively connected to the RF feed. The antenna structure is disposed on at least two sides of an antenna carrier.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: January 26, 2016
    Assignee: Amazon Technologies, Inc.
    Inventor: Tzung-I Lee
  • Patent number: 9153869
    Abstract: A wideband antenna apparatus including a harmonically suppressed low band antenna is provided. The low band antenna is configured as a folded monopole antenna with patch coupling for resonance in a first frequency band. A patch portion of the low band antenna is widely separated from a folded feed portion of the low band antenna to avoid slot resonances above the first frequency band. The patch portion is relatively large to avoid folding of the patch portion that could introduce resonances above the first frequency band. The wideband antenna apparatus may also include a high band antenna proximate with the low band antenna. The high band antenna may be a folded monopole patch coupled antenna configured for resonating in a second frequency band. The high band antenna may optionally be configured like the low band antenna to suppress resonances of the high band antenna above the second frequency band.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: October 6, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, In Chul Hyun, Cheol Su Kim
  • Patent number: 9130279
    Abstract: Antenna structures and methods of operating the same of a multi-feed antenna of an electronic device are described. A multi-feed antenna includes a first antenna element coupled to a first tuner circuit that is coupled a first radio frequency (RF) feed, and a second antenna element coupled to a second tuner circuit that is coupled to a second RF feed. The first tuner circuit is programmable to independently adjust a first impedance of the first antenna element and the second tuner circuit is programmable to independently adjust a second impedance of the second antenna element.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: September 8, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, In Chul Hyun, Cheol Su Kim, Jerry Weiming Kuo
  • Patent number: 9077066
    Abstract: Methods and systems for extending a bandwidth of a wideband antenna of a user device are described. A wideband antenna includes a parasitic element coupled to ground and a single radio frequency (RF) input coupled to an antenna structure at a first point. The antenna structure comprises a tapered side that tapers away from the first point to create an increasingly larger gap between the antenna structure and ground. The antenna structure is configured to operate as a feeding structure to the parasitic element, the parasitic element not being conductively connected to the antenna structure.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: July 7, 2015
    Assignee: Amazon Technologies, Inc.
    Inventor: Tzung-I Lee
  • Patent number: 9048528
    Abstract: Antenna structures of electronic devices and methods of operating the electronic devices with the antenna structures are described. One antenna structure includes a ground plane, a radio frequency (RF) feed, a first antenna element coupled to the RF feed, a second antenna element coupled to the RF feed and a third antenna element coupled to the ground plane at a grounding point. The third antenna element is at least partially disposed between the first and second antenna elements to form a first coupling between the first antenna element and the third antenna element, a second coupling between the second antenna element and the third antenna element and a third coupling between the second antenna element and the third antenna element.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: June 2, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Young R. Cha
  • Patent number: 9035840
    Abstract: Methods and systems for radiating electromagnetic energy with a patch antenna structure are described. The patch antenna structure may be formed of a metal member of the user device and is coupled to a ground plane in a first plane and is coupled to a radio frequency (RF) feed) at a portion of the patch antenna structure disposed in a second plane. The patch antenna structure is configured to radiate at an opening between the patch antenna and the ground plane.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: May 19, 2015
    Assignee: Amazon Technologies, Inc.
    Inventor: Tzung-I Lee
  • Patent number: 8957827
    Abstract: Off-feed matching circuits for antenna structures of user devices and methods of operating the user devices with the off-feed matching circuits are described. Off-feed matching circuits are matching circuits that are positioned on the radiating elements and not on the feed line. One apparatus includes a RF feed coupled to an excitation antenna element of an antenna structure. The antenna structure also includes two radiating antenna elements and two matching circuits, one for each of the radiating antenna elements. The two radiating antenna elements may be conductively coupled to the excitation antenna element or parasitically coupled to the excitation element.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: February 17, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, In Chul Hyun
  • Patent number: 8952851
    Abstract: Methods and systems for radiating electromagnetic energy with a direct-feed patch antenna are described. The direct-feed patch antenna may be formed of a metal member of the user device and is grounded to the ground plane at a ground point disposed in relation to a feed location of the direct-feed patch antenna, the feed location to be directly coupled to receive a radio frequency (RF) signal. The direct-feed patch antenna is configured to radiate electromagnetic energy in response to the RF signal.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: February 10, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Morris Hsu, Anuj Dron, Tzung-I Lee
  • Patent number: 8890753
    Abstract: Antenna structures of electronic devices and methods of operating the electronic devices with the antenna structures are described. One apparatus includes a RF feed coupled to a split-feed antenna element of an antenna structure. The antenna structure also includes a parasitic grounding element coupled to a ground plane. The split-feed antenna element is configured to operate as a feeding structure to the parasitic grounding element that is not conductively connected to the RF feed.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: November 18, 2014
    Assignee: Amazon Technologies, Inc.
    Inventor: Tzung-I Lee
  • Patent number: 8847828
    Abstract: Antenna structures of electronic devices and methods of operating the electronic devices with the antenna structures are described. One apparatus includes a RF feed coupled to a first element and a second element of an antenna structure. The antenna structure also includes a parasitic grounding element coupled to a ground plane and is interleaved with the first element and second element to form at least a dual coupling with respect to the RF feed. The first element and second element are configured to operate as a feeding structure to a parasitic grounding element that is not conductively connected to the RF feed.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: September 30, 2014
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Young R. Cha
  • Patent number: 8604983
    Abstract: A variety of configurations for a CRLH structured antenna in a wireless device are presented. An antenna having portions of the CRLH structure positioned on different layers provides an elevated structure. An antenna is presented having a double folded antenna structure, wherein a cell patch includes extensions on multiple layers of a substrate.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: December 10, 2013
    Inventors: Vaneet Pathak, Gregory Poilasne, Shane Thornwall, Tzung-I Lee, Alan Pasion, Norberto Lopez, Ajay Gummalla
  • Publication number: 20120001804
    Abstract: A variety of configurations for a CRLH structured antenna in a wireless device are presented. An antenna having portions of the CRLH structure positioned on different layers provides an elevated structure. An antenna is presented having a double folded antenna structure, wherein a cell patch includes extensions on multiple layers of a substrate.
    Type: Application
    Filed: February 4, 2011
    Publication date: January 5, 2012
    Inventors: Vaneet Pathak, Gregory Poilasne, Shane Thornwall, Tzung-I Lee, Alan Pasion, Norberto Lopez, Ajay Gummalla