Patents by Inventor Bing A. Chiang
Bing A. Chiang 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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Patent number: 7705779Abstract: A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters.Type: GrantFiled: August 15, 2008Date of Patent: April 27, 2010Assignee: InterDigital Technology CorporationInventors: Steven J. Goldberg, Michael J. Lynch, Bing A. Chiang
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Patent number: 7696943Abstract: An antenna assembly includes at least two active or main radiating omni-directional antenna elements arranged with at least one beam control or passive antenna element used as a reflector. The beam control antenna element(s) may have multiple reactance elements that can electrically terminate it to adjust the input or output beam pattern(s) produced by the combination of the active antenna elements and the beam control antenna element(s). More specifically, the beam control antenna element(s) may be coupled to different terminating reactances to change beam characteristics, such as the directivity and angular beam width. Processing may be employed to select which terminating reactance to use. Consequently, the radiator pattern of the antenna can be more easily directed towards a specific target receiver/transmitter, reduce signal-to-noise interference levels, and/or increase gain.Type: GrantFiled: November 22, 2006Date of Patent: April 13, 2010Assignee: IPR Licensing, Inc.Inventor: Bing A. Chiang
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Patent number: 7633442Abstract: A satellite communication subscriber device includes a smart antenna for generating antenna beams for receiving signals from at least one satellite, and a receiver. The receiver includes a quality metric module for calculating a quality metric on the signals received by each antenna beam. A beam selector is coupled to the smart antenna for selecting the antenna beams. An antenna steering algorithm module runs an antenna steering algorithm for operating the beam selector for scanning the antenna beams, receiving the calculated quality metrics from the receiver for each scanned antenna beam, and comparing the calculated quality metrics. The algorithm selects one of the scanned antenna beams based upon the comparing for continuing to receive signals from the at least one satellite.Type: GrantFiled: June 2, 2005Date of Patent: December 15, 2009Assignee: InterDigital Technology CorporationInventors: Bing A. Chiang, Inhyok Cha, Michael J. Lynch, Thomas E. Gorsuch
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Patent number: 7482981Abstract: A communications device includes a housing, an ionized air stream generator carried by the housing for generating an ionized air stream, and an ionized air chamber carried by the housing for directing the ionized air stream external the housing to function as an antenna. A transceiver is carried by the housing and is coupled to the ionized air chamber. The transceiver excites or detects changes in a current flow in the ionized air stream at radio communication frequencies.Type: GrantFiled: July 28, 2005Date of Patent: January 27, 2009Assignee: InterDigital Technology CorporationInventors: Steven Jeffrey Goldberg, Bing A. Chiang
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Publication number: 20080303718Abstract: A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters.Type: ApplicationFiled: August 15, 2008Publication date: December 11, 2008Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Bing A. Chiang, Steven Jeffrey Goldberg, Michael James Lynch
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Patent number: 7427953Abstract: A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters.Type: GrantFiled: November 22, 2005Date of Patent: September 23, 2008Assignee: InterDigital Technology CorporationInventors: Bing A. Chiang, Steven Jeffrey Goldberg, Michael James Lynch
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Patent number: 7403160Abstract: A low profile smart antenna includes an active antenna element carried by a dielectric substrate, and active antenna element has a T-shape. Passive antenna elements are carried by the dielectric substrate, and they have an inverted L-shaped portion laterally adjacent the active antenna element. Impedance elements are selectively connectable to the passive antenna elements for antenna beam steering.Type: GrantFiled: June 16, 2005Date of Patent: July 22, 2008Assignee: Interdigital Technology CorporationInventors: Bing A. Chiang, Michael J. Lynch, Douglas H. Wood, Thomas Liu, Govind R. Kadambi, Mark W. Kishler
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Patent number: 7224321Abstract: A smart antenna includes a ground plane, an active antenna element adjacent the ground plane, and passive antenna elements adjacent the ground plane. The passive antenna elements have different sizes for defining different resonant frequencies for increasing a bandwidth of the smart antenna. Dielectric layers having different dielectric constants may also be used for coating the passive antenna elements for defining different resonant frequencies. Impedance elements are connected to the ground plane and are selectively connectable to the passive antenna elements for antenna beam steering.Type: GrantFiled: July 27, 2005Date of Patent: May 29, 2007Assignee: InterDigital Technology CorporationInventors: Bing A. Chiang, Michael J. Lynch, Dee M. Richeson, legal representative, Douglas H. Wood, Joseph T. Richeson, deceased
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Patent number: 7193574Abstract: An antenna for controlling a beam direction both in azimuth and elevation is disclosed. An antenna comprises a ground plane, at least one active element, and a plurality of passive elements. Both an upper half and a lower half of the passive elements are connected to the ground plane with variable reactive loads, whereby elevation angle of the radio beam is controlled by adjusting the variable reactive loads. Alternatively, an antenna may comprise a radio frequency (RF) choke coupled to the ground plane, whereby an elevation angle of the radio beam is controlled by controlling the RF choke. Alternatively, an antenna comprises a variable lens for changing a wave front of a radio wave which is passing through the variable lens, whereby the beam width and direction are controlled by the variable lens.Type: GrantFiled: February 25, 2005Date of Patent: March 20, 2007Assignee: InterDigital Technology CorporationInventors: Bing A. Chiang, Michael James Lynch, Steven Jeffrey Goldberg
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Patent number: 7180465Abstract: A smart antenna includes an active antenna element, a passive antenna element laterally adjacent the active antenna element, and an impedance element selectively connectable to the passive antenna element for antenna beam steering. A ground plane includes a center portion adjacent the active antenna element, and first and second arms extending outwardly from the center portion. The first arm is connected to the impedance element, and the second arm is laterally adjacent the first arm.Type: GrantFiled: August 11, 2005Date of Patent: February 20, 2007Assignee: InterDigital Technology CorporationInventors: Michael J. Lynch, Thomas Liu, Bing A. Chiang, Govind R. Kadambi
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Patent number: 7180464Abstract: A smart antenna includes a ground plane, an active antenna element adjacent the ground plane and having a radio frequency (RF) input associated therewith, and passive antenna elements adjacent the ground plane. Impedance elements are connected to the ground plane and are selectively connectable to the passive antenna elements for antenna beam steering. Tuning elements are adjacent the passive antenna elements for tuning thereof so that an input impedance of the RF input of the active antenna element remains relatively constant during the antenna beam steering.Type: GrantFiled: July 27, 2005Date of Patent: February 20, 2007Assignee: InterDigital Technology CorporationInventors: Bing A. Chiang, Dee M. Richeson, legal representative, Joseph T. Richeson, deceased
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Patent number: 6992622Abstract: A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters.Type: GrantFiled: December 29, 2004Date of Patent: January 31, 2006Assignee: InterDigital Technology CorporationInventors: Bing A. Chiang, Steven Jeffrey Goldberg, Michael James Lynch