Patents by Inventor Gavin Watkins
Gavin Watkins 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: 11947032Abstract: A full duplex radio apparatus comprising: a transmit path configured to transmit a first signal; a receive path configured to receive a received signal; a near-receive path for observing a first period of the received signal; a far-receive path for observing a second period of the received signal, the far-receive path comprising a radio frequency limiter; a self-interference cancellation circuit coupled between the transmit path and the near receive path; a variable impedance component; and a directional coupler comprising a first port, a second port, a third port, and a fourth port, wherein: the first port is coupled to the receive path; the second port is coupled to the radio frequency limiter of the far-receive path; the third port is coupled to the self-interference cancellation circuit; and the fourth port is coupled to the variable impedance component.Type: GrantFiled: July 2, 2021Date of Patent: April 2, 2024Assignee: Kabushiki Kaisha ToshibaInventor: Gavin Watkins
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Patent number: 11726166Abstract: A full duplex dual polar radar transceiver comprising a dual polarisation radar antenna, a transmission path, a horizontal polarisation receive path, and a vertical polarisation receive path, a first cancellation path connected between the transmission path and the vertical polarisation receive path, and a second cancellation path connected between the transmission path and the horizontal polarisation receive path. Each cancellation path is configured to vary a transmission signal provided by the transmission path by varying at least one of a phase shift, a delay, or an amplitude so as to cancel self-interference on each of the vertical and horizontal polarisation receive paths.Type: GrantFiled: November 18, 2020Date of Patent: August 15, 2023Assignee: Kabushiki Kaislia ToshibaInventors: Alfred Daniel Wiffen, Gavin Watkins
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Publication number: 20230003832Abstract: A full duplex radio apparatus comprising: a transmit path configured to transmit a first signal; a receive path configured to receive a received signal; a near-receive path for observing a first period of the received signal; a far-receive path for observing a second period of the received signal, the far-receive path comprising a radio frequency limiter; a self-interference cancellation circuit coupled between the transmit path and the near receive path; a variable impedance component; and a directional coupler comprising a first port, a second port, a third port, and a fourth port, wherein: the first port is coupled to the receive path; the second port is coupled to the radio frequency limiter of the far-receive path; the third port is coupled to the self-interference cancellation circuit; and the fourth port is coupled to the variable impedance component.Type: ApplicationFiled: July 2, 2021Publication date: January 5, 2023Applicant: Kabushiki Kaisha ToshibaInventor: Gavin WATKINS
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Publication number: 20220155408Abstract: A full duplex dual polar radar transceiver comprising a dual polarisation radar antenna, a transmission path, a horizontal polarisation receive path, and a vertical polarisation receive path, a first cancellation path connected between the transmission path and the vertical polarisation receive path, and a second cancellation path connected between the transmission path and the horizontal polarisation receive path. Each cancellation path is configured to vary a transmission signal provided by the transmission path by varying at least one of a phase shift, a delay, or an amplitude so as to cancel self-interference on each of the vertical and horizontal polarisation receive paths.Type: ApplicationFiled: November 18, 2020Publication date: May 19, 2022Applicant: Kabushiki Kaisha ToshibaInventors: Alfred Daniel WIFFEN, Gavin WATKINS
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Publication number: 20210039108Abstract: A mill includes a housing with a first end portion, a second end portion, and a lateral area disposed therebetween. The housing includes a raw material inlet, an air inlet, a recirculated material inlet, and a material outlet. An impeller is supported by the housing and includes a shaft disposed along the longitudinal axis of the housing, with a plurality of curved blades.Type: ApplicationFiled: July 17, 2020Publication date: February 11, 2021Inventors: Duane Nelson, Gavin Watkins, Aleksander Marcin Chabros, Wyatt Kivela
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Publication number: 20200238291Abstract: A mill includes a housing with a first end portion, a second end portion, and a lateral area disposed therebetween. The housing includes a raw material inlet, an air inlet, a recirculated material inlet, and a material outlet. An impeller is supported by the housing and includes a shaft disposed along the longitudinal axis of the housing, with a plurality of curved blades. A method for milling includes receiving a material of a first size range, introducing the material to an apparatus via a first inlet and introducing air into the apparatus via a second inlet. The method also includes agitating the material via an impeller, where the agitation reduces at least some of the material to a second size range by the time the material reaches an outlet of the apparatus. The processed material is delivered to subsequent processing operations.Type: ApplicationFiled: December 20, 2019Publication date: July 30, 2020Inventors: Gavin Watkins, Duane Nelson
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Patent number: 10644394Abstract: A system and method for duplexing radio frequency signals for full-duplex transmission and reception by an antenna. The system comprises a signal coupler comprising an antenna node configured to be connected to the antenna, an input node for receiving radio frequency signals for transmission by the antenna, an output node for outputting radio frequency signals received by the antenna, and a coupling node. The system further comprises a variable impedance element connected to the coupling node to reduce interference between the signals for transmission by the antenna and the signals received by the antenna, the variable impedance element comprising a variable phase shifter connected to a variable attenuator.Type: GrantFiled: February 16, 2017Date of Patent: May 5, 2020Assignee: Kabushiki Kaisha ToshibaInventor: Gavin Watkins
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Patent number: 10547279Abstract: An amplifier for amplifying radio frequency signals comprising: a signal splitter configured to split an input radio frequency signal into two or more signals; and two or more switching power amplifiers. Each of the switching power amplifiers is configured to amplify a respective signal of the two or more signals using an active device and output a respective amplified signal at a respective output terminal of the switching power amplifier when the switching power amplifier is activated. Each of the two or more switching power amplifiers has a different maximum output power. The amplifier further comprises: an output node connected to each of the output terminals of the switching power amplifiers to combine the amplified signals and output a combined amplified signal; and control circuitry configured to issue control signal to control bias voltages provided to a gate of each of the active devices of the switching power amplifier to selectively activate and deactivate the active devices.Type: GrantFiled: November 17, 2017Date of Patent: January 28, 2020Assignee: Kabushiki Kaisha ToshibaInventor: Gavin Watkins
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Patent number: 10512917Abstract: A mill includes a housing with a first end portion, a second end portion, and a lateral area disposed therebetween. The housing includes a raw material inlet, an air inlet, a recirculated material inlet, and a material outlet. An impeller is supported by the housing and includes a shaft disposed along the longitudinal axis of the housing, with a plurality of curved blades. A method for milling includes receiving a material of a first size range, introducing the material to an apparatus via a first inlet and introducing air into the apparatus via a second inlet. The method also includes agitating the material via an impeller, where the agitation reduces at least some of the material to a second size range by the time the material reaches an outlet of the apparatus. The processed material is delivered to subsequent processing operations.Type: GrantFiled: March 8, 2016Date of Patent: December 24, 2019Assignee: Mineworx Technologies Ltd.Inventors: Gavin Watkins, Duane Nelson
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Patent number: 10404225Abstract: In one aspect the embodiments relate to amplifier circuitry comprising an outphasing region and envelope tracking region. The outphasing region includes a signal processing block capable of receiving an amplitude and phase modulated input signal that is to be amplified, and processing said signal to separate it into two signals (S1, S2) of constant amplitude and modulated phase, a first signal S1 for driving a first RF power amplifier RF PA1 and a second signal S2 for driving a second RF power amplifier RF PA2. The output signals from each of the RF PAs are then provided to a power combiner (PC) for obtaining an output amplified signal (RF output).Type: GrantFiled: June 26, 2015Date of Patent: September 3, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Gavin Watkins, Konstantinos Mimis
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Publication number: 20190158047Abstract: An amplifier for amplifying radio frequency signals comprising: a signal splitter configured to split an input radio frequency signal into two or more signals; and two or more switching power amplifiers. Each of the switching power amplifiers is configured to amplify a respective signal of the two or more signals using an active device and output a respective amplified signal at a respective output terminal of the switching power amplifier when the switching power amplifier is activated. Each of the two or more switching power amplifiers has a different maximum output power. The amplifier further comprises: an output node connected to each of the output terminals of the switching power amplifiers to combine the amplified signals and output a combined amplified signal; and control circuitry configured to issue control signal to control bias voltages provided to a gate of each of the active devices of the switching power amplifier to selectively activate and deactivate the active devices.Type: ApplicationFiled: November 17, 2017Publication date: May 23, 2019Applicant: Kabushiki Kaisha ToshibaInventor: Gavin WATKINS
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Patent number: 10277169Abstract: In one embodiment an amplifier circuit is disclosed. The amplifier circuit comprises an amplifying device configured to amplify a radiofrequency signal, the amplifying device having an output dynamic range; a supply modulator configured to modulate a supply voltage supplied to the amplifying device when an output of the amplifying device is within a first region of the output dynamic range; a tuneable matching network coupled to an output of the amplifying device; and a load controller configured to control the tuneable matching network, when the output of the amplifying device is within a second region of the output dynamic range, and thereby modulate the load to which the output of the amplifying device is applied.Type: GrantFiled: May 27, 2015Date of Patent: April 30, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Konstantinos Mimis, Gavin Watkins
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Patent number: 10224882Abstract: An embodiment provides an amplifier system with multiple amplification paths connected to a combiner for combination of signals amplified in the amplification paths, each amplification path comprising an amplifier and a matching network provided between the amplifier and the combiner, wherein the individual amplifiers can interact through the combiner, causing an active load-pull effect. The matching networks of the paths comprise harmonic terminations configured to one or more of reduce an overlap between the voltage and current waveforms within the amplifier connected to the matching network and improve the linearity of one or more of the amplifiers.Type: GrantFiled: January 13, 2017Date of Patent: March 5, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Paolo Enrico De Falco, Gavin Watkins, Konstantinos Mimis, Kevin A. Morris, Souheil Ben Smida
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Patent number: 10097137Abstract: In one embodiment a transmitter is disclosed.Type: GrantFiled: August 29, 2014Date of Patent: October 9, 2018Assignee: Kabushiki Kaisha ToshibaInventors: Gavin Watkins, Konstantinos Mimis
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Patent number: 10075135Abstract: In an embodiment an envelope modulator comprises a gain compensated lag-lead network or a gain compensated lead-lag network.Type: GrantFiled: September 13, 2013Date of Patent: September 11, 2018Assignee: Kabushiki Kaisha ToshibaInventor: Gavin Watkins
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Patent number: 10063196Abstract: A power amplifier comprising an amplifying element for amplifying a signal input to the amplifier, a matching network for varying the reactance presented to the output of the amplifying element at the fundamental frequency of the input signal, the matching network being switchable between first and second operating configurations, wherein in the first operating configuration, a net inductive reactance is presented to the output at the fundamental frequency and in the second operating configuration, a net capacitive reactance is presented to the output at the fundamental frequency.Type: GrantFiled: October 8, 2014Date of Patent: August 28, 2018Assignee: Kabushiki Kaisha ToshibaInventors: Konstantinos Mimis, Gavin Watkins
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Publication number: 20180205346Abstract: An embodiment provides an amplifier system with multiple amplification paths connected to a combiner for combination of signals amplified in the amplification paths, each amplification path comprising an amplifier and a matching network provided between the amplifier and the combiner, wherein the individual amplifiers can interact through the combiner, causing an active load-pull effect. The matching networks of the paths comprise harmonic terminations configured to one or more of reduce an overlap between the voltage and current waveforms within the amplifier connected to the matching network and improve the linearity of one or more of the amplifiers.Type: ApplicationFiled: January 13, 2017Publication date: July 19, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Paolo Enrico DE FALCO, Gavin Watkins, Konsiantinos Mimis, Kevin A. Morris, Souheil Ben Simida
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Patent number: 10027288Abstract: In an embodiment an amplifier circuit comprises an amplifying element configured to amplify a radiofrequency input signal; a bias modulator configured to provide a bias voltage to the amplifying element, the bias voltage depending on a bias control signal; and a tuneable matching network configured to modulate the load to which the output of the amplifying element is applied.Type: GrantFiled: October 28, 2013Date of Patent: July 17, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Konstantinos Mimis, Gavin Watkins
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Patent number: 10027293Abstract: An amplifier for modulating the amplitude of an RF signal, the amplifier including: a plurality of amplifier circuits, each circuit being connected to a first power source, each circuit including a charge storage device and an output across which a potential difference supplied by the first power source can be applied; a switching arrangement for switching connections between the first power source, the charge storage device, and the output in each amplifier circuit, wherein each circuit includes a first switched configuration in which the charge storage device is charged by the first power source and a second switched configuration in which the charge storage device, once charged, will apply an additional potential difference across the output. The amplifier is configured to vary the amplitude of the RF signal in proportion to the sum of the potential differences applied across the output in each amplifier circuit.Type: GrantFiled: December 5, 2013Date of Patent: July 17, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventor: Gavin Watkins
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Publication number: 20180123521Abstract: In one embodiment an amplifier circuit is disclosed. The amplifier circuit comprises an amplifying device configured to amplify a radiofrequency signal, the amplifying device having an output dynamic range; a supply modulator configured to modulate a supply voltage supplied to the amplifying device when an output of the amplifying device is within a first region of the output dynamic range; a tuneable matching network coupled to an output of the amplifying device; and a load controller configured to control the tuneable matching network, when the output of the amplifying device is within a second region of the output dynamic range, and thereby modulate the load to which the output of the amplifying device is applied.Type: ApplicationFiled: May 27, 2015Publication date: May 3, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Konstantinos MIMIS, Gavin WATKINS