Patents by Inventor Ramanamurthy V. Darapu

Ramanamurthy V. Darapu 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: 11967937
    Abstract: A packaged semiconductor chip includes a semiconductor sub strate having formed thereon: radio-frequency (RF) input and output contact pads, DC contact pads, and first and second amplifier stages. An input of the first amplifier stage is coupled with the RF input contact pad. An input and an output of the second amplifier stage are respectively coupled to an output of the first amplifier stage and the RF output contact pad. The DC contact pads and the input of the first amplifier stages are connected via an input bias coupling path. The outputs of the amplifier stages are connected via an output bias coupling path. The chip further includes a lead frame having RF input and output pins electrically coupled to the RF input and output contact pads, and input bias pins electrically coupled to the DC contact pad.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: April 23, 2024
    Assignee: Viasat, Inc.
    Inventors: Shih Peng Sun, Kenneth V. Buer, Michael R. Lyons, Gary P. English, Qiang R. Chen, Ramanamurthy V. Darapu, Douglas J. Mathews, Mark S. Berkheimer, Brandon C. Drake
  • Patent number: 11855667
    Abstract: Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: December 26, 2023
    Assignee: Viasat, Inc.
    Inventors: Kenneth V. Buer, Ramanamurthy V. Darapu, Martin Gimersky, David E. Pettit, Bill T. Agar
  • Publication number: 20230284047
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Application
    Filed: December 27, 2022
    Publication date: September 7, 2023
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Patent number: 11582623
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: February 14, 2023
    Assignee: Viasat, Inc.
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Publication number: 20220131562
    Abstract: Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.
    Type: Application
    Filed: January 5, 2022
    Publication date: April 28, 2022
    Inventors: Kenneth V. Buer, Ramanamurthy V. Darapu, Martin Gimersky, David E. Pettit, Bill T. Agar
  • Patent number: 11258472
    Abstract: Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: February 22, 2022
    Assignee: VIASAT, Inc.
    Inventors: Kenneth V. Buer, Ramanamurthy V. Darapu, Martin Gimersky, David E. Pettit, Bill T. Agar
  • Publication number: 20220038175
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Application
    Filed: July 28, 2021
    Publication date: February 3, 2022
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Patent number: 11109245
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: August 31, 2021
    Assignee: Viasat, Inc.
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Publication number: 20200366259
    Abstract: A packaged semiconductor chip includes a power amplifier die including a semiconductor substrate, and an input contact pad, an output contact pad, first and second direct-current (DC) contact pads, one or more transistors having an input coupled to the input contact pad, and an input bias coupling path electrically coupling the first DC contact pad to the second DC contact pad and the input contact pad implemented on the semiconductor substrate. The chip further includes a lead frame having one or more radio-frequency input pins electrically coupled to the input contact pad, one or more radio-frequency output pins electrically coupled to the output contact pad, and first and second input bias pins electrically coupled to the first and second DC contact pads, respectively.
    Type: Application
    Filed: January 17, 2019
    Publication date: November 19, 2020
    Applicant: VIASAT, INC.
    Inventors: Shih Peng SUN, Kenneth V. BUER, Michael R. LYONS, Gary P. ENGLISH, Qiang R. CHEN, Ramanamurthy V. DARAPU, Douglas J. MATHEWS, Mark S. BERKHEIMER, Brandon C. DRAKE
  • Publication number: 20200358467
    Abstract: Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.
    Type: Application
    Filed: February 1, 2019
    Publication date: November 12, 2020
    Applicant: VIASAT, INC.
    Inventors: Kenneth V. BUER, Ramanamurthy V. DARAPU, Martin GIMERSKY, David E. PETTIT, Bill T. AGAR
  • Publication number: 20200267575
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Application
    Filed: January 21, 2020
    Publication date: August 20, 2020
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Publication number: 20200195340
    Abstract: Described techniques and apparatuses relate to determining an attenuation environment surrounding a satellite terminal in a satellite communication system. The satellite terminal may receive signals from an auxiliary satellite system, and determine aspects of an attenuation environment that may affect communications with a communications satellite system. For example, transmissions from an auxiliary satellite system may be associated with a respective location of the transmitting satellite in order to define an attenuation profile for the satellite terminal antenna assembly. Subsequent signals from the auxiliary satellite system may be compared with the attenuation map, and the comparison may be used to identify a diagnostic condition for communications with a communications satellite system.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 18, 2020
    Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
  • Patent number: 10609576
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: March 31, 2020
    Assignee: Viasat, Inc.
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Patent number: 10594386
    Abstract: Described techniques and apparatuses relate to determining an attenuation environment surrounding a satellite terminal in a satellite communication system. The satellite terminal may receive signals from an auxiliary satellite system, and determine aspects of an attenuation environment that may affect communications with a communications satellite system. For example, transmissions from an auxiliary satellite system may be associated with a respective location of the transmitting satellite in order to define an attenuation profile for the satellite terminal antenna assembly. Subsequent signals from the auxiliary satellite system may be compared with the attenuation map, and the comparison may be used to identify a diagnostic condition for communications with a communications satellite system.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: March 17, 2020
    Assignee: Viasat, Inc.
    Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
  • Publication number: 20190349072
    Abstract: Described techniques and apparatuses relate to determining an attenuation environment surrounding a satellite terminal in a satellite communication system. The satellite terminal may receive signals from an auxiliary satellite system, and determine aspects of an attenuation environment that may affect communications with a communications satellite system. For example, transmissions from an auxiliary satellite system may be associated with a respective location of the transmitting satellite in order to define an attenuation profile for the satellite terminal antenna assembly. Subsequent signals from the auxiliary satellite system may be compared with the attenuation map, and the comparison may be used to identify a diagnostic condition for communications with a communications satellite system.
    Type: Application
    Filed: June 6, 2019
    Publication date: November 14, 2019
    Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
  • Patent number: 10361771
    Abstract: Described techniques and apparatuses relate to determining an attenuation environment surrounding a satellite terminal in a satellite communication system. The satellite terminal may receive signals from an auxiliary satellite system, and determine aspects of an attenuation environment that may affect communications with a communications satellite system. For example, transmissions from an auxiliary satellite system may be associated with a respective location of the transmitting satellite in order to define an attenuation profile for the satellite terminal antenna assembly. Subsequent signals from the auxiliary satellite system may be compared with the attenuation map, and the comparison may be used to identify a diagnostic condition for communications with a communications satellite system.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: July 23, 2019
    Assignee: Viasat, Inc.
    Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
  • Publication number: 20180324606
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Application
    Filed: July 10, 2018
    Publication date: November 8, 2018
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Patent number: 10034183
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: July 24, 2018
    Assignee: ViaSat, Inc.
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Publication number: 20170251381
    Abstract: The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
    Type: Application
    Filed: February 26, 2016
    Publication date: August 31, 2017
    Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
  • Publication number: 20170212243
    Abstract: Described techniques and apparatuses relate to determining an attenuation environment surrounding a satellite terminal in a satellite communication system. The satellite terminal may receive signals from an auxiliary satellite system, and determine aspects of an attenuation environment that may affect communications with a communications satellite system. For example, transmissions from an auxiliary satellite system may be associated with a respective location of the transmitting satellite in order to define an attenuation profile for the satellite terminal antenna assembly. Subsequent signals from the auxiliary satellite system may be compared with the attenuation map, and the comparison may be used to identify a diagnostic condition for communications with a communications satellite system.
    Type: Application
    Filed: January 22, 2016
    Publication date: July 27, 2017
    Inventors: Ramanamurthy V. Darapu, Ian A. Cleary