Patents by Inventor Qinjiang Rao
Qinjiang Rao 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).
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Publication number: 20130328737Abstract: A broadband monopole antenna with dual-radiating elements is provided. In one embodiment, an antenna comprises a ground plane; a first radiating structure having a symmetric configuration along a central axis, comprising a first feed point electrically connected to the base of said first radiating structure along said central axis and a first slot with a corresponding first open-ended strip along said central axis; and a second radiating structure conjoined with said first radiating structure having a symmetric configuration along said central axis, comprising a second feed point electrically connected to the base of said second radiating structure along said central axis and a second slot with a corresponding second open-ended strip along said central axis; and wherein the antenna resonates and operates at a plurality of resonant frequencies.Type: ApplicationFiled: August 14, 2013Publication date: December 12, 2013Applicant: BlackBerry LimitedInventors: Mina AYATOLLAHI, Qinjiang RAO
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Publication number: 20130285867Abstract: An antenna for diversity operation comprising a plurality of connected antenna units (100). The antenna units each having a first radiation element (102) with length of a quarter of a wavelength at a first operating frequency a second radiation element (104) with length of a quarter of a wavelength at a second operating frequency distinct from the first operating frequency, the second radiation element sharing with the first radiation element a segment of the first radiation element. A feed point for coupling a feed to one of said first or second radiation elements such that the elements resonate at the first and second operating frequencies respectively and at substantially orthogonal polarizations. Diversity antennas configured with two or more of the antenna units.Type: ApplicationFiled: September 17, 2010Publication date: October 31, 2013Applicant: RESEARCH IN MOTION LIMITEDInventors: Dong Wang, Qinjiang Rao, James Paul Warden
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Publication number: 20130267181Abstract: Embodiments of the disclosure provide systems and methods for improving user equipment performance by implementing antenna selection based on measurement of performance parameters of a plurality of antennas. In some embodiments, the antenna parameter measurements comprise radiated power. In other embodiments, the antenna parameter measurements comprise reflected power. In various embodiments, the antenna parameter measurements may be based on data from sensors that are operable to detect operational characteristics of the plurality of antennas based on the proximity of a portion of a user's body to the sensors. The antenna parameter measurements are then used to select one of the antennas within the plurality of antennas for transmitting and receiving data signals by a wireless communication device.Type: ApplicationFiled: April 9, 2012Publication date: October 10, 2013Inventors: Mina Ayatollahi, Qinjiang Rao
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Patent number: 8552913Abstract: A multiple input-multiple output antenna assembly with high isolation between the antennas is disclosed. The antenna assembly includes a substrate with a ground layer at its surface. Two antennas are disposed opposing each other on the substrate. A meandering slot is interposed between the first and second antennas on the ground plane. A first signal port is provided for applying a first signal to excite the first antenna and a second signal port is provided for applying a second signal to excite the second antenna. The meandering slot provides isolation that inhibits electromagnetic propagation between the first and second antennas. A third signal port is provided for applying a third signal to excite the meandering slot to act as another antenna for multiple input, multiple output operation.Type: GrantFiled: May 10, 2010Date of Patent: October 8, 2013Assignee: BlackBerry LimitedInventors: Mina Ayatollahi, Qinjiang Rao
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Patent number: 8531344Abstract: A broadband monopole antenna with dual-radiating elements is provided. In one embodiment, an antenna comprises a ground plane; a first radiating structure having a symmetric configuration along a central axis, comprising a first feed point electrically connected to the base of said first radiating structure along said central axis and a first slot with a corresponding first open-ended strip along said central axis; and a second radiating structure conjoined with said first radiating structure having a symmetric configuration along said central axis, comprising a second feed point electrically connected to the base of said second radiating structure along said central axis and a second slot with a corresponding second open-ended strip along said central axis; and wherein the antenna resonates and operates at a plurality of resonant frequencies.Type: GrantFiled: June 28, 2010Date of Patent: September 10, 2013Assignee: BlackBerry LimitedInventors: Mina Ayatollahi, Qinjiang Rao
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Patent number: 8514132Abstract: A compact multiple-band antenna for wireless devices having a plurality of operating frequency bands is provided.Type: GrantFiled: November 10, 2009Date of Patent: August 20, 2013Assignee: Research In Motion LimitedInventor: Qinjiang Rao
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Patent number: 8390519Abstract: A dual-feed port dual band (DFDB) antenna module comprising a first antenna element disposed on a first planar surface, a second antenna element disposed on a second planar surface, and a third antenna element disposed on a third planar surface. A first feed port is coupled to a first transceiver circuit adapted to operate in a first band and a second feed port is coupled to a second transceiver circuit adapted to operate in the first band and to a receiver circuit adapted to operate in a second band. The first and second feed ports are oriented substantially orthogonal with respect to each other.Type: GrantFiled: January 7, 2010Date of Patent: March 5, 2013Assignee: Research In Motion LimitedInventors: Dong Wang, Qinjiang Rao
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Patent number: 8350764Abstract: A dual-antenna diversity antenna system that operates within a low frequency band range is disclosed. Two antennas are folded separately onto a single three dimensional dielectric substrate in a meander pattern configuration. Each antenna has an independent feed port and ground pin. The two antennas are configured within a compact mobile terminal to produce high isolation and low correlation at resonating frequencies within the 700 Megahertz frequency band.Type: GrantFiled: June 9, 2010Date of Patent: January 8, 2013Assignee: Research In Motion LimitedInventors: Qinjiang Rao, Dong Wang
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Publication number: 20120200462Abstract: An antenna assembly for a mobile wireless communication device has a support with a first surface and a second surface between which a third surface and a fourth surface extend. A conductive ground plane is formed on the second surface. An antenna includes an electrically conductive patch located on the first surface, and first and second electrically conductive legs and an electrically conductive stripe all abutting the patch. In one version the first and second legs and the strip are all on the third surface. In another version the first and second legs are on the third surface and the strip is on the fourth surface that is orthogonal to the third surface. A first signal port is adapted to apply a first signal to the first leg and a second signal port is adapted to apply a second signal to the third leg.Type: ApplicationFiled: April 16, 2012Publication date: August 9, 2012Applicant: RESEARCH IN MOTION LIMITEDInventors: Qinjiang Rao, Dong Wang
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Patent number: 8203498Abstract: A three-fold polarization diversity antenna comprises a slot-loaded patch, and a radiation member that is electromagnetically coupled to the slot-loaded patch. The radiation member extends through a plane of the slot-loaded patch.Type: GrantFiled: October 19, 2008Date of Patent: June 19, 2012Assignee: Research In Motion LimitedInventors: Qinjiang Rao, Geyi Wen, Dong Wang
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Patent number: 8179324Abstract: An antenna assembly for a mobile wireless communication device has a support with a first surface and a second surface between which a third surface and a fourth surface extend. A conductive ground plane is formed on the second surface. An antenna includes an electrically conductive patch located on the first surface, and first and second electrically conductive legs and an electrically conductive stripe all abutting the patch. In one version the first and second legs and the strip are all on the third surface. In another version the first and second legs are on the third surface and the strip is on the fourth surface that is orthogonal to the third surface. A first signal port is adapted to apply a first signal to the first leg and a second signal port is adapted to apply a second signal to the third leg.Type: GrantFiled: February 3, 2009Date of Patent: May 15, 2012Assignee: Research In Motion LimitedInventors: Qinjiang Rao, Dong Wang
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Wideband, High Isolation Two Port Antenna Array for Multiple Input, Multiple Output Handheld Devices
Publication number: 20120068905Abstract: A multiple input-multiple output antenna assembly with high isolation between the antennas is disclosed. The antenna assembly includes a substrate with a ground layer at its surface. Two antennas are disposed opposing each other on the substrate. An isolation element in a form of a patterned slot is interposed between the first and second antennas on the ground plane. A first signal port is provided for applying a first signal to excite the first antenna and a second signal port is provided for applying a second signal to excite the second antenna. The isolation element provides isolation that inhibits electromagnetic propagation between the two antennas.Type: ApplicationFiled: November 21, 2011Publication date: March 22, 2012Inventors: Mina Ayatollahi, Qinjiang Rao, Dong Wang -
Publication number: 20120009884Abstract: A multiple input multiple output (MIMO) antenna module, comprising a first signal feed port coupled to a first antenna element disposed along a first edge of an antenna array board, a second signal feed port coupled to a second antenna element disposed on the antenna array board and a transceiver operable to be selectively coupled to either or both of the first and second signal feed ports.Type: ApplicationFiled: July 12, 2010Publication date: January 12, 2012Applicant: Research In Motion LimitedInventors: Qinjiang Rao, James Paul Warden, Mina Ayatollahi
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Publication number: 20110316755Abstract: A broadband monopole antenna with dual-radiating elements is provided. In one embodiment, an antenna comprises a ground plane; a first radiating structure having a symmetric configuration along a central axis, comprising a first feed point electrically connected to the base of said first radiating structure along said central axis and a first slot with a corresponding first open-ended strip along said central axis; and a second radiating structure conjoined with said first radiating structure having a symmetric configuration along said central axis, comprising a second feed point electrically connected to the base of said second radiating structure along said central axis and a second slot with a corresponding second open-ended strip along said central axis; and wherein the antenna resonates and operates at a plurality of resonant frequencies.Type: ApplicationFiled: June 28, 2010Publication date: December 29, 2011Inventors: Mina Ayatollahi, Qinjiang Rao
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Publication number: 20110298669Abstract: A dual-antenna diversity antenna system that operates within a low frequency band range is disclosed. Two antennas are folded separately onto a single three dimensional dielectric substrate in a meander pattern configuration. Each antenna has an independent feed port and ground pin. The two antennas are configured within a compact mobile terminal to produce high isolation and low correlation at resonating frequencies within the 700 Megahertz frequency band.Type: ApplicationFiled: June 9, 2010Publication date: December 8, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: QINJIANG RAO, DONG WANG
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Publication number: 20110215971Abstract: A diversity antenna system that operates within a low frequency band ranging from 700 Megahertz is disclosed. A plurality of antennas are folded onto a single printed circuit in a meander pattern configuration. Each antenna has an independent feed port and ground pin. The plurality of antennas are configured within a compact mobile phone space to produce a high isolation and low correlation at resonating frequencies within the 700 Megahertz frequency band.Type: ApplicationFiled: March 5, 2010Publication date: September 8, 2011Applicant: RESEARCH IN MOTION LIMITEDInventor: QINJIANG RAO
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Publication number: 20110163922Abstract: A dual-feed dual band (DFDB) antenna module comprising a first antenna element disposed on a first planar surface, a second antenna element disposed on a second planar surface, and a third antenna element disposed on a third planar surface, wherein the first, second and third planar surfaces are substantially orthogonal with respect to one another such that two feed ports formed are substantially orthogonal to each other.Type: ApplicationFiled: January 7, 2010Publication date: July 7, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Dong Wang, Qinjiang Rao
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Publication number: 20110115677Abstract: A multi-band antenna comprising a dielectric substrate, a ground plane formed on a first area of the dielectric substrate, a radiation part arranged in a second area of the dielectric substrate where the ground surface is not formed, a feed section formed of a metallic trace and having one end connected to the radiation part and an opposite end disposed near an edge of the ground plane for forming a feed point and the radiation part having a pair of monopole antenna elements formed of conductive metallic traces; a first monopole antenna element for radiating at a first resonant frequency, and a second monopole antenna element for radiating at a second resonant frequency and the conductive metallic traces being folded to form a three dimensional structure, with at least a portion of said first monopole spaced from a plane of the substrate and said second monopole.Type: ApplicationFiled: November 13, 2009Publication date: May 19, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Qinjiang Rao, Dong Wang
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Publication number: 20110109515Abstract: A compact multiple-band antenna for wireless devices having a plurality of operating frequency bands is provided.Type: ApplicationFiled: November 10, 2009Publication date: May 12, 2011Inventor: Qinjiang Rao
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Patent number: 7911392Abstract: An antenna assembly has a plurality of conductive elements to enable use in multiple frequency bands assigned for a mobile wireless communications. The antenna assembly has a six-sided support frame non-electrically conductive material which provides external surfaces on which specific conductive patterns are formed with the patterns on different surface being selectively connected together. The support frame is mounted on one major surface of a dielectric substrate that has an opposite major surface with a conductive layer that serves as ground plane. A portion of the opposite major surface, on which the conductive layer is not applied, forms one surface of the support frame.Type: GrantFiled: November 24, 2008Date of Patent: March 22, 2011Assignee: Research in Motion LimitedInventors: Qinjiang Rao, Shirook M. Ali, Dong Wang