Patents by Inventor Gareth A. Lloyd

Gareth A. Lloyd 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: 12216151
    Abstract: A measurement instrument for testing a DUT comprises a common port configured to be connectable to a signal output of the DUT for receiving a forward-travelling signal from the DUT. The measurement instrument further comprises a signal line connected to the common port, a signal analysis circuit and a signal generator circuit. The signal analysis circuit receives the forward-travelling signal from the common port. The signal analysis circuit is configured to analyze the forward-travelling signal in order to assess a performance of the DUT. The signal generator circuit is connected to the signal line and is configured to generate a backward-travelling signal that is forwarded to the common port. The signal generator circuit comprises a reference signal input configured to receive a reference signal from a reference signal generator. The signal generator circuit is configured to generate the backward-travelling signal based on the reference signal.
    Type: Grant
    Filed: April 25, 2023
    Date of Patent: February 4, 2025
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Paul Gareth Lloyd, Markus Loerner
  • Publication number: 20240361377
    Abstract: A measurement instrument for testing a DUT comprises a common port configured to be connectable to a signal output of the DUT for receiving a forward-travelling signal from the DUT. The measurement instrument further comprises a signal line connected to the common port, a signal analysis circuit and a signal generator circuit. The signal analysis circuit receives the forward-travelling signal from the common port. The signal analysis circuit is configured to analyze the forward-travelling signal in order to assess a performance of the DUT. The signal generator circuit is connected to the signal line and is configured to generate a backward-travelling signal that is forwarded to the common port. The signal generator circuit comprises a reference signal input configured to receive a reference signal from a reference signal generator. The signal generator circuit is configured to generate the backward-travelling signal based on the reference signal.
    Type: Application
    Filed: April 25, 2023
    Publication date: October 31, 2024
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventors: Paul Gareth LLOYD, Markus LOERNER
  • Publication number: 20240142345
    Abstract: A measurement system includes a common port, the common port being connectable to a signal output of the device under test. The measurement system further includes a signal line being connected to the common port, wherein the signal line includes a first directional coupler portion and a second directional coupler portion. The measurement system further includes a signal processing circuit, wherein the signal processing circuit includes an IQ analysis circuit and an IQ synthesizer circuit. The IQ analysis circuit is connected with the common port via the first directional coupler portion so as to receive a forward-travelling signal from the common port. Further, a testing method of testing a device under test is described.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 2, 2024
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventor: Paul Gareth Lloyd
  • Publication number: 20230370034
    Abstract: An amplifier circuit arrangement for amplifying at least one input signal to an output signal for delivery to a load. The amplifier circuit arrangement includes at least one four-port hybrid coupler, a main amplifier having an input terminal for receiving a first input signal and coupled to a first port of the hybrid coupler, an auxiliary amplifier having an input terminal for receiving a second input signal and coupled to the second port of the hybrid coupler, a negative resistance amplifier circuit coupled to the third port of the hybrid coupler. The negative resistance amplifier circuit receives a signal from the hybrid coupler via the third port and returns an amplified signal back to the third port of the hybrid coupler. At least one of the auxiliary amplifier and negative resistance amplifier circuit selectively operates in combination with the main amplifier circuit.
    Type: Application
    Filed: April 20, 2023
    Publication date: November 16, 2023
    Inventor: Paul Gareth Lloyd
  • Patent number: 11698405
    Abstract: A method and a system for determining at least one contribution of at least one device under test (DUT) are described. The DUT may be part of a radio frequency (RF) device chain. The method includes capturing a first signal portion at a first node associated with an input of the DUT and capturing a second signal portion at a second node associated with an output of the DUT. The first signal portion and the second signal portion are captured quasi-simultaneously. The method may also include aligning the captured first signal portion and the captured second signal portion with each other temporally, and determining the contribution of the DUT by comparing the first signal portion and the second signal portion.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: July 11, 2023
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Paul Gareth Lloyd
  • Publication number: 20230013607
    Abstract: A method and a system for determining at least one contribution of at least one device under test (DUT) are described. The DUT may be part of a radio frequency (RF) device chain. The method includes capturing a first signal portion at a first node associated with an input of the DUT and capturing a second signal portion at a second node associated with an output of the DUT. The first signal portion and the second signal portion are captured quasi-simultaneously. The method may also include aligning the captured first signal portion and the captured second signal portion with each other temporally, and determining the contribution of the DUT by comparing the first signal portion and the second signal portion.
    Type: Application
    Filed: July 9, 2021
    Publication date: January 19, 2023
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventor: Paul Gareth Lloyd
  • Patent number: 11515863
    Abstract: A comb signal generator that includes at least two signal sources that each provide a signal, wherein the signals provided by the at least two signal sources are shaped similarly. The com signal generator also has a combining circuit connected with the at least two signal sources, wherein the combining circuit is configured to combine the signals provided by the at least two signal sources, thereby generating a combined signal. Further, the com signal generator includes a clipping circuit connected with the combining circuit, wherein the clipping circuit is configured to receive and process the combined signal, thereby generating a comb signal. Further, a method of providing a phase and amplitude reference is described.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: November 29, 2022
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Paul Gareth Lloyd, Matthias Ruengeler
  • Publication number: 20220286119
    Abstract: A comb signal generator that includes at least two signal sources that each provide a signal, wherein the signals provided by the at least two signal sources are shaped similarly. The comb signal generator also has a combining circuit connected with the at least two signal sources, wherein the combining circuit is configured to combine the signals provided by the at least two signal sources, thereby generating a combined signal. Further, the comb signal generator includes a clipping circuit connected with the combining circuit, wherein the clipping circuit is configured to receive and process the combined signal, thereby generating a comb signal. Further, a method of providing a phase and amplitude reference is described.
    Type: Application
    Filed: March 8, 2021
    Publication date: September 8, 2022
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventors: Paul Gareth Lloyd, Matthias Ruengeler
  • Patent number: 11119145
    Abstract: A performance testing method for determining a performance of a device under test having non-linear characteristics is disclosed. The performance testing method comprises the following steps: generating a hard clipper model of said device under test; generating a test signal having predefined properties; forwarding said test signal to the device under test, wherein the device under test generates an output signal based on said test signal; feeding said hard clipper model with said test signal, thereby generating a model output signal; and comparing said output signal to said model output signal in order to determine the performance of the device under test. Moreover, a measurement system for determining a performance of a device under test having non-linear characteristics is disclosed.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: September 14, 2021
    Assignee: Rohde & Schwarz & GmbH & Co. KG
    Inventors: Paul Gareth Lloyd, Fabricio Dourado
  • Patent number: 11108403
    Abstract: A device for converting a digital input signal into an analog output signal is provided. The device includes a first digital to analog converter configured to generate a first analog signal, and a second digital to analog converter configured to generate a second analog signal. The device further includes a signal splitter configured to couple out a feedback signal from the second analog signal. The device further includes a first signal combiner configured to subtract the feedback signal from the first analog signal to generate an error signal. The device further includes an amplifier configured to amplify the error signal, resulting in an amplified error signal. The device further includes a second signal combiner configured to combine the amplified error signal and a signal derived from the second analog signal, resulting in the analog output signal.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: August 31, 2021
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Gareth Lloyd
  • Publication number: 20200309847
    Abstract: A performance testing method for determining a performance of a device under test having non-linear characteristics is disclosed. The performance testing method comprises the following steps: generating a hard clipper model of said device under test; generating a test signal having predefined properties; forwarding said test signal to the device under test, wherein the device under test generates an output signal based on said test signal; feeding said hard clipper model with said test signal, thereby generating a model output signal; and comparing said output signal to said model output signal in order to determine the performance of the device under test. Moreover, a measurement system for determining a performance of a device under test having non-linear characteristics is disclosed.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 1, 2020
    Inventors: Paul Gareth LLOYD, Fabricio DOURADO
  • Patent number: 10686537
    Abstract: A measuring system for determining phase differences of antenna element signals of antenna elements of an antenna array under test is provided. The measuring system comprises a signal generating means, which is configured to provide a measuring signal to the antenna array under test over the air and receiving means configured to measure the antenna element signals, resulting from receiving the measuring signal by the antenna elements of the antenna array under test and determine the phase difference of the antenna element signals.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: June 16, 2020
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Mahmud Naseef, Gareth Lloyd, Markus Reil
  • Patent number: 10551470
    Abstract: A calibration apparatus for calibrating at least one of a signal generator and a signal analyzer is described, wherein the calibration apparatus comprises an input terminal for establishing a connection with the signal generator, an output terminal for establishing a connection with the signal analyzer, a reference signal source for providing a reference signal, and a combiner circuit for combining signals received. The combiner circuit has a first input connected to the reference signal source and a second input assigned to the input terminal, the combiner circuit having an output assigned to the output terminal. Further, a calibration system and a method for calibrating at least one of a signal generator and a signal analyzer are described.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: February 4, 2020
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Paul Gareth Lloyd, Simon Ache, Michael König
  • Patent number: 10523343
    Abstract: A measuring system for determining a beamforming quality of an antenna array signal of an antenna array of a device under test. The measuring system comprises a measuring device configured to receive an antenna array signal, and to measure the antenna array signal and to determine a beamforming signal quality thereof. The antenna array signal is wirelessly transmitted to the receiver by the antenna array of a device under test. The measuring system further comprises a positioning unit configured to position the device under test in successive predefined orientations. The measuring device is configured to receive and measure the antenna array signal successively in each of the predefined orientations.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: December 31, 2019
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Mahmud Naseef, Gareth Lloyd, Markus Reil
  • Patent number: 10326539
    Abstract: A test system for testing an array antenna under test with at least two antenna elements comprises a signal generator that generates a test signal, a signal splitter that splits the test signal into a plurality of antenna source signals for the single antenna elements, and a vector multiplier for each one of the antenna source signals, wherein the vector multipliers each adjust the amplitude and/or phase of the respective antenna source signal according to predetermined adjustment parameters and wherein output ports of the vector multipliers are connected to respective ones of the antenna elements.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: June 18, 2019
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Gareth Lloyd
  • Publication number: 20190094327
    Abstract: A calibration apparatus for calibrating at least one of a signal generator and a signal analyzer is described, wherein the calibration apparatus comprises an input terminal for establishing a connection with the signal generator, an output terminal for establishing a connection with the signal analyzer, a reference signal source for providing a reference signal, and a combiner circuit for combining signals received. The combiner circuit has a first input connected to the reference signal source and a second input assigned to the input terminal, the combiner circuit having an output assigned to the output terminal. Further, a calibration system and a method for calibrating at least one of a signal generator and a signal analyzer are described.
    Type: Application
    Filed: September 22, 2017
    Publication date: March 28, 2019
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventors: Paul Gareth Lloyd, Simon Ache, Michael König
  • Patent number: 10158433
    Abstract: A system for measuring or characterizing a multi-element antenna having at least two antenna elements comprises a vector network analyzer with at least two input/output ports. Each input/output port of the vector network analyzer is connected to one antenna element of the multi-element antenna. The vector network analyzer has generator means for generating waves at each of its input/output ports, which are coherent to each other.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: December 18, 2018
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Gareth Lloyd, Markus Reil, Mahmud Naseef
  • Publication number: 20180302178
    Abstract: A test system for testing an array antenna under test with at least two antenna elements comprises a signal generator that generates a test signal, a signal splitter that splits the test signal into a plurality of antenna source signals for the single antenna elements, and a vector multiplier for each one of the antenna source signals, wherein the vector multipliers each adjust the amplitude and/or phase of the respective antenna source signal according to predetermined adjustment parameters and wherein output ports of the vector multipliers are connected to respective ones of the antenna elements.
    Type: Application
    Filed: April 12, 2017
    Publication date: October 18, 2018
    Inventor: Gareth Lloyd
  • Publication number: 20180302099
    Abstract: A device for converting a digital input signal into an analog output signal is provided. The device includes a first digital to analog converter configured to generate a first analog signal, and a second digital to analog converter configured to generate a second analog signal. The device further includes a signal splitter configured to couple out a feedback signal from the second analog signal. The device further includes a first signal combiner configured to subtract the feedback signal from the first analog signal to generate an error signal. The device further includes an amplifier configured to amplify the error signal, resulting in an amplified error signal. The device further includes a second signal combiner configured to combine the amplified error signal and a signal derived from the second analog signal, resulting in the analog output signal.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 18, 2018
    Inventor: Gareth LLOYD
  • Patent number: 10097139
    Abstract: A design method for designing a multi-path amplifier involves connecting an amplifier stage having at least two amplifier branches to a combiner stage; feeding a plurality of testing signals with one or more of a plurality of sweeping variables to the amplifier stage; measuring output signals at the output of the combiner stage depending on the plurality of testing signals; designing a structure of an input network stage for the amplifier stage on the basis of the measured output signals; and combining the designed input network stage with the amplifier stage to create an efficiency-optimized multi-path amplifier.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 9, 2018
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Gareth Lloyd