Patents by Inventor Rubina F. Ahmed
Rubina F. Ahmed 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: 9893400Abstract: A frequency band splitter is disclosed. The frequency band splitter includes a first, a second, and a third waveguides. A first narrow rectangular waveguide is utilized to connect the first waveguide to second waveguide. The first narrow rectangular waveguide has a first width to allow signals of a frequency band centered around a first frequency to be transmitted from the first waveguide to the second waveguide. A second narrow rectangular waveguide is utilized to connect the first waveguide to the third waveguide. The second narrow rectangular waveguide has a second width, which is different from the first width, to allow signals of a frequency band centered around a second frequency to be transmitted from the first waveguide to the third waveguide.Type: GrantFiled: June 8, 2015Date of Patent: February 13, 2018Assignee: International Business Machines CorporationInventors: Jose A. Hejase, Rubina F. Ahmed, Daniel M. Dreps, James D. Jordan, Nam H. Pham, Lloyd A. Walls
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Patent number: 9368852Abstract: A frequency band splitter is disclosed. The frequency band splitter includes a first, a second, and a third waveguides. A first narrow rectangular waveguide is utilized to connect the first waveguide to second waveguide. The first narrow rectangular waveguide has a first width to allow signals of a frequency band centered around a first frequency to be transmitted from the first waveguide to the second waveguide. A second narrow rectangular waveguide is utilized to connect the first waveguide to the third waveguide. The second narrow rectangular waveguide has a second width, which is different from the first width, to allow signals of a frequency band centered around a second frequency to be transmitted from the first waveguide to the third waveguide.Type: GrantFiled: October 24, 2014Date of Patent: June 14, 2016Assignee: International Business Machines CorporationInventors: Jose A. Hejase, Rubina F. Ahmed, Daniel M. Dreps, James D. Jordan, Nam H. Pham, Lloyd A. Walls
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Publication number: 20160118703Abstract: A frequency band splitter is disclosed. The frequency band splitter includes a first, a second, and a third waveguides, A first narrow rectangular waveguide is utilized to connect the first waveguide to second waveguide. The first narrow rectangular waveguide has a first width to allow signals of a frequency band centered around a first frequency to be transmitted from the first waveguide to the second waveguide. A second narrow rectangular waveguide is utilized to connect the first waveguide to the third waveguide. The second narrow rectangular waveguide has a second width, which is different from the first width, to allow signals of a frequency band centered around a second frequency to be transmitted from the first waveguide to the third waveguide.Type: ApplicationFiled: October 24, 2014Publication date: April 28, 2016Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: JOSE A. HEJASE, RUBINA F. AHMED, DANIEL M. DREPS, JAMES D. JORDAN, NAM H. PHAM, LLOYD A. WALLS
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Publication number: 20160118706Abstract: A frequency band splitter is disclosed. The frequency band splitter includes a first, a second, and a third waveguides. A first narrow rectangular waveguide is utilized to connect the first waveguide to second waveguide. The first narrow rectangular waveguide has a first width to allow signals of a frequency band centered around a first frequency to be transmitted from the first waveguide to the second waveguide. A second narrow rectangular waveguide is utilized to connect the first waveguide to the third waveguide. The second narrow rectangular waveguide has a second width, which is different from the first width, to allow signals of a frequency band centered around a second frequency to be transmitted from the first waveguide to the third waveguide.Type: ApplicationFiled: June 8, 2015Publication date: April 28, 2016Inventors: JOSE A. HEJASE, RUBINA F. AHMED, DANIEL M. DREPS, JAMES D. JORDAN, NAM H. PHAM, LLOYD A. WALLS
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Publication number: 20120330619Abstract: In a disclosed example, nets are used to represent connections between elements on different pages of an electronic drawing in a software package for computer aided drawings. Previews for these connections are automatically generated, such as during an automated inventory of the electronic drawing. The automatically-generated connection previews are stored in memory, such as in a preview database, for subsequent recall and display. The user may select a net to recall and display the previously generated connection preview. The user may then select the displayed preview to be added to a dynamic workspace, such as by clicking on the connection preview using a pointing device. Elements and connections added to the dynamic workspace are fully editable from the dynamic workspace. Any changes made in the dynamic workspace are updated to the pages containing the changed elements.Type: ApplicationFiled: June 21, 2011Publication date: December 27, 2012Applicant: International Business Machines CorporationInventors: Rubina F. Ahmed, Antrell K. Grice, Sunil K. Mishra, Adam J. Parker
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Patent number: 8106666Abstract: Testing an electrical component, the component including a printed circuit board (‘PCB’) with a number of traces, the traces organized in pairs with each trace of a pair carrying current in opposite directions and separated from one another by a substrate layer of the PCB, where testing of the electrical component includes: dynamically and iteratively until a present impedance for a pair of traces of the component is greater than a predetermined threshold impedance: increasing, by an impedance varying device at the behest of a testing device, magnetic field strength of a magnetic field applied to the pair of traces by the impedance varying device, including increasing the present impedance of the pair of traces; measuring, by the testing device, one or more operating parameters; and recording, by the testing device, the measurements of the operating parameters.Type: GrantFiled: March 12, 2009Date of Patent: January 31, 2012Assignee: International Business Macines CorporationInventors: Rubina F. Ahmed, Moises Cases, Bradley D. Herrman, Bhyrav M. Mutnury, Pravin Patel, Peter R. Seidel
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Patent number: 7956688Abstract: Embodiments of the invention include a common mode cancellation circuit and method for correcting signal skew in a differential circuit. According to one embodiment, an op amp circuit is used to correct the mismatch between transmission line lengths in the differential circuit. The CMCC can be embodied as an ASIC and added on to an existing differential signaling systems to correct and compensate for board wiring skew or other causes of phase misalignment. The result is restoration of the cross-over intersection of the plus and minus signals of the differential pair closer to the common voltage level point, as if the signals had been in phase.Type: GrantFiled: October 7, 2009Date of Patent: June 7, 2011Assignee: International Business Machines CorporationInventors: Rubina F. Ahmed, Bradley D. Herrman, Pravin Patel, Peter R. Seidel
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Publication number: 20110080973Abstract: Embodiments of the invention include a common mode cancellation circuit and method for correcting signal skew in a differential circuit. According to one embodiment, an op amp circuit is used to correct the mismatch between transmission line lengths in the differential circuit. The CMCC can be embodied as an ASIC and added on to an existing differential signaling systems to correct and compensate for board wiring skew or other causes of phase misalignment. The result is restoration of the cross-over intersection of the plus and minus signals of the differential pair closer to the common voltage level point, as if the signals had been in phase.Type: ApplicationFiled: October 7, 2009Publication date: April 7, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Rubina F. Ahmed, Bradley D. Herrman, Pravin Patel, Peter R. Seidel
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Publication number: 20100231209Abstract: Testing an electrical component, the component including a printed circuit board (‘PCB’) with a number of traces, the traces organized in pairs with each trace of a pair carrying current in opposite directions and separated from one another by a substrate layer of the PCB, where testing of the electrical component includes: dynamically and iteratively until a present impedance for a pair of traces of the component is greater than a predetermined threshold impedance: increasing, by an impedance varying device at the behest of a testing device, magnetic field strength of a magnetic field applied to the pair of traces by the impedance varying device, including increasing the present impedance of the pair of traces; measuring, by the testing device, one or more operating parameters; and recording, by the testing device, the measurements of the operating parameters.Type: ApplicationFiled: March 12, 2009Publication date: September 16, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Rubina F. Ahmed, Moises Cases, Bradley D. Herrman, Bhyrav M. Mutnury, Pravin Patel, Peter R. Seidel