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).
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Patent number: 11967937Abstract: 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: GrantFiled: January 17, 2019Date of Patent: April 23, 2024Assignee: 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
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Patent number: 11855667Abstract: 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: GrantFiled: January 5, 2022Date of Patent: December 26, 2023Assignee: Viasat, Inc.Inventors: Kenneth V. Buer, Ramanamurthy V. Darapu, Martin Gimersky, David E. Pettit, Bill T. Agar
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Publication number: 20230284047Abstract: 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: ApplicationFiled: December 27, 2022Publication date: September 7, 2023Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Patent number: 11582623Abstract: 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: GrantFiled: July 28, 2021Date of Patent: February 14, 2023Assignee: Viasat, Inc.Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Publication number: 20220131562Abstract: 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: ApplicationFiled: January 5, 2022Publication date: April 28, 2022Inventors: Kenneth V. Buer, Ramanamurthy V. Darapu, Martin Gimersky, David E. Pettit, Bill T. Agar
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Patent number: 11258472Abstract: 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: GrantFiled: February 1, 2019Date of Patent: February 22, 2022Assignee: VIASAT, Inc.Inventors: Kenneth V. Buer, Ramanamurthy V. Darapu, Martin Gimersky, David E. Pettit, Bill T. Agar
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Publication number: 20220038175Abstract: 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: ApplicationFiled: July 28, 2021Publication date: February 3, 2022Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Patent number: 11109245Abstract: 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: GrantFiled: January 21, 2020Date of Patent: August 31, 2021Assignee: Viasat, Inc.Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Publication number: 20200366259Abstract: 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: ApplicationFiled: January 17, 2019Publication date: November 19, 2020Applicant: 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
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Publication number: 20200358467Abstract: 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: ApplicationFiled: February 1, 2019Publication date: November 12, 2020Applicant: VIASAT, INC.Inventors: Kenneth V. BUER, Ramanamurthy V. DARAPU, Martin GIMERSKY, David E. PETTIT, Bill T. AGAR
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Publication number: 20200267575Abstract: 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: ApplicationFiled: January 21, 2020Publication date: August 20, 2020Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Publication number: 20200195340Abstract: 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: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
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Patent number: 10609576Abstract: 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: GrantFiled: July 10, 2018Date of Patent: March 31, 2020Assignee: Viasat, Inc.Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Patent number: 10594386Abstract: 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: GrantFiled: June 6, 2019Date of Patent: March 17, 2020Assignee: Viasat, Inc.Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
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Publication number: 20190349072Abstract: 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: ApplicationFiled: June 6, 2019Publication date: November 14, 2019Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
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Patent number: 10361771Abstract: 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: GrantFiled: January 22, 2016Date of Patent: July 23, 2019Assignee: Viasat, Inc.Inventors: Ramanamurthy V. Darapu, Ian A. Cleary
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Publication number: 20180324606Abstract: 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: ApplicationFiled: July 10, 2018Publication date: November 8, 2018Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Patent number: 10034183Abstract: 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: GrantFiled: February 26, 2016Date of Patent: July 24, 2018Assignee: ViaSat, Inc.Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Publication number: 20170251381Abstract: 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: ApplicationFiled: February 26, 2016Publication date: August 31, 2017Inventors: Kenneth V. Buer, Clifford K. Burdick, Ian A. Cleary, Ramanamurthy V. Darapu, David H. Irvine, Philip A. Lampe
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Publication number: 20170212243Abstract: 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: ApplicationFiled: January 22, 2016Publication date: July 27, 2017Inventors: Ramanamurthy V. Darapu, Ian A. Cleary