Patents by Inventor Eduardo Antonio Rojas
Eduardo Antonio Rojas 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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Publication number: 20240372619Abstract: A beaconless alignment approach can be used such as to facilitate establishment of an optical communication link or to enhance reliability of such an optical communication link. When laser-based free-space optical communication is used, such an approach can be referred to as an agile beaconless laser beam alignment (ABLBA) technique. Such an ABLBA technique can consume less scanning time as compared to other approaches and can be used for alignment in relation to establishing an optical communication link between stations, such as between satellites. For example, at a transmitting station, a non-optical beam can be scanned according to a first specified search pattern within an initial search field, and an optical field can be scanned according to a second specified search pattern within a refined search field, the refined search field established at least in part using an alignment identified from the scanning of the non-optical beam.Type: ApplicationFiled: March 30, 2023Publication date: November 7, 2024Inventors: Eduardo Antonio ROJAS, Chengtao XU
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Patent number: 12050343Abstract: A novel polymer optical waveguide and method of manufacturing is presented herein. A digitally manufactured process is described which utilizes a micro-dispensed UV optical adhesive as the contour guiding cladding, a fused deposition modeling technology for creating a core, and a subtractive laser process to finish the two ends of the optical interconnect. The optical waveguide can be printed directly on a circuit board in some embodiments. Alternatively, using a slightly modified process including a step to bond the optical fiber to the substrate, the optical interconnect can be manufactured on a flexible substrate.Type: GrantFiled: November 8, 2022Date of Patent: July 30, 2024Assignee: University of South FloridaInventors: Venkat Rama Bhethanabotla, Thomas M. Weller, Roger Brandon Tipton, John Townsend Bentley, Eduardo Antonio Rojas
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Publication number: 20240151902Abstract: A novel polymer optical waveguide and method of manufacturing is presented herein. A digitally manufactured process is described which utilizes a micro-dispensed UV optical adhesive as the contour guiding cladding, a fused deposition modeling technology for creating a core, and a subtractive laser process to finish the two ends of the optical interconnect. The optical waveguide can be printed directly on a circuit board in some embodiments. Alternatively, using a slightly modified process including a step to bond the optical fiber to the substrate, the optical interconnect can be manufactured on a flexible substrate.Type: ApplicationFiled: November 8, 2022Publication date: May 9, 2024Inventors: Venkat Rama Bhethanabotla, Thomas M. Weller, Roger Brandon Tipton, John Townsend Bentley, Eduardo Antonio Rojas
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Patent number: 11874295Abstract: Apparatus and techniques are described for monitoring slosh of a liquid within a propellant tank. The approaches described herein can use an electromagnetic transmitter positioned at a first location on or within the tank, the electromagnetic transmitter coupled to a source of electromagnetic energy and arranged to establish a specified electromagnetic field configuration within the tank using a signal from the source, and an electromagnetic receiver positioned at a different second location on or within the tank, the electromagnetic receiver arranged to sense an electromagnetic field established within the tank by the electromagnetic transmitter. A control circuit can be coupled to the electromagnetic receiver, the control circuit configured to determine a characteristic of a spatial configuration of the liquid using the sensed electromagnetic field. The characteristic can include one or more of a position, a quantity, or a spatial distribution of the liquid, as an illustration.Type: GrantFiled: September 17, 2021Date of Patent: January 16, 2024Assignee: Embry-Riddle Aeronautical University, Inc.Inventors: Eduardo Antonio Rojas, Bogdan Udrea, Daniel Sommer, Nicholas Moline
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Publication number: 20230234292Abstract: Antenna structures can include an additively manufactured engineered fingerprint (AMEF). AMEF antenna features facilitate individual or type classification of an unknown source antenna. As described herein, physical features can be included in an additively manufactured antenna to facilitate source identification, such as without sacrificing antenna performance. In general, AMEF techniques can improve physical layer security, such as without dramatically increasing production cost or decreasing production throughput, as compared to other approaches.Type: ApplicationFiled: January 23, 2023Publication date: July 27, 2023Inventors: Eduardo Antonio Rojas et al., Noemi Miguélea-Gòmez
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Publication number: 20230127791Abstract: Additive manufacturing can include use of a laser-machining technique. Laser machining can be used to form cavities, trenches, or other features in an additively-manufactured structure. Spectroscopy can be performed to monitor a laser machining operation. For example, a laser-enhanced additive manufacturing process flow can include depositing a conductive layer on a surface of a dielectric layer, and conductively isolating a first region from a second region of the conductive layer using ablative optical energy, including applying ablative optical energy to the conductive layer, monitoring a spectrum of an ablative plume generated by applying the ablative optical energy, and controlling the ablative optical energy in response to a characteristic of the spectrum of the ablative plume.Type: ApplicationFiled: October 20, 2022Publication date: April 27, 2023Inventors: Eduardo Antonio Rojas et al., Susan Davis Allen
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Patent number: 11561343Abstract: A novel polymer optical waveguide and method of manufacturing is presented herein. A digitally manufactured process is described which utilizes a micro-dispensed UV optical adhesive as the contour guiding cladding, a fused deposition modeling technology for creating a core, and a subtractive laser process to finish the two ends of the optical interconnect. The optical waveguide can be printed directly on a circuit board in some embodiments. Alternatively, using a slightly modified process including a step to bond the optical fiber to the substrate, the optical interconnect can be manufactured on a flexible substrate.Type: GrantFiled: September 16, 2020Date of Patent: January 24, 2023Assignee: University of South FloridaInventors: Venkat Rama Bhethanabotla, Thomas M. Weller, Roger Brandon Tipton, John Townsend Bentley, Eduardo Antonio Rojas
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Patent number: 11329384Abstract: Apparatus and techniques described herein can include antenna configurations and related fabrication. For example, a Z-axis meandering antenna configuration can be fabricated, such as by forming a dielectric substrate extending in two dimensions and defining an undulating region extending out of a plane defined by the two dimensions; and forming at least one conductive region following a contour of the dielectric substrate including at least a portion of the undulating region. The at least one conductive region can follow the contour of the dielectric substrate, such as including a first conductive region on a first layer, and a second conductive region on another layer separate from the first conductive region of the first conductive layer.Type: GrantFiled: January 21, 2021Date of Patent: May 10, 2022Assignee: Embry-Riddle Aeronautical University, Inc.Inventors: Eduardo Antonio Rojas, Carlos R. Mejias-Morillo
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Publication number: 20220091156Abstract: Apparatus and techniques are described for monitoring slosh of a liquid within a propellant tank. The approaches described herein can use an electromagnetic transmitter positioned at a first location on or within the tank, the electromagnetic transmitter coupled to a source of electromagnetic energy and arranged to establish a specified electromagnetic field configuration within the tank using a signal from the source, and an electromagnetic receiver positioned at a different second location on or within the tank, the electromagnetic receiver arranged to sense an electromagnetic field established within the tank by the electromagnetic transmitter. A control circuit can be coupled to the electromagnetic receiver, the control circuit configured to determine a characteristic of a spatial configuration of the liquid using the sensed electromagnetic field. The characteristic can include one or more of a position, a quantity, or a spatial distribution of the liquid, as an illustration.Type: ApplicationFiled: September 17, 2021Publication date: March 24, 2022Inventors: Eduardo Antonio Rojas, Bogdan Udrea, Daniel Sommer, Nicholas Moline
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Publication number: 20210226336Abstract: Apparatus and techniques described herein can include antenna configurations and related fabrication. For example, a Z-axis meandering antenna configuration can be fabricated, such as by forming a dielectric substrate extending in two dimensions and defining an undulating region extending out of a plane defined by the two dimensions; and forming at least one conductive region following a contour of the dielectric substrate including at least a portion of the undulating region. The at least one conductive region can follow the contour of the dielectric substrate, such as including a first conductive region on a first layer, and a second conductive region on another layer separate from the first conductive region of the first conductive layer.Type: ApplicationFiled: January 21, 2021Publication date: July 22, 2021Inventors: Eduardo Antonio Rojas, Carlos R. Mejias-Morillo
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Patent number: 10852479Abstract: A novel polymer optical waveguide and method of manufacturing is presented herein. A digitally manufactured process is described which utilizes a micro-dispensed UV optical adhesive as the contour guiding cladding, a fused deposition modeling technology for creating a core, additional optical adhesive to complete the cladding and a subtractive laser process to finish the two ends of the optical interconnect.Type: GrantFiled: September 21, 2018Date of Patent: December 1, 2020Assignee: University of South FloridaInventors: Venkat Rama Bhethanabotla, Thomas M. Weller, Roger Brandon Tipton, John Townsend Bentley, Eduardo Antonio Rojas
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Patent number: 10396422Abstract: In some embodiments, an apertured waveguide includes a wall comprising a plurality of apertures and an interior channel along which electromagnetic waves can propagate, the interior channel being defined at least in part by the wall.Type: GrantFiled: March 15, 2017Date of Patent: August 27, 2019Assignee: University of South FloridaInventors: Eduardo Antonio Rojas, Justin Troy Nussbaum, Thomas McCrea Weller, Nathan Brad Crane
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Patent number: 10289945Abstract: In one embodiment, a radio-frequency identification (RFID) tag includes a substrate having a top surface including first and second ends, a bottom surface, first and second end surfaces, and opposed lateral surfaces, a passive RFID integrated circuit (IC) chip mounted to the top surface of the substrate, a monopole antenna that includes a planar radiating arm that extends out from the RFID IC chip along the top surface of the substrate to the first end of the top surface of the substrate and a matching loop having two grounded matching stubs that surround the chip and a portion of the radiating arm, each matching stub comprising a longitudinal segment that extends along a longitudinal direction of the substrate and a transverse segment that extends along a transverse direction of the substrate along the top surface of the substrate to the radiating arm at a point located between the RFID IC chip and the first end of the top surface, and a ground plane formed on the bottom surface, the second end surface, andType: GrantFiled: November 6, 2017Date of Patent: May 14, 2019Assignee: University of South FloridaInventors: Ramiro Augusto Ramirez, Thomas McCrea Weller, Eduardo Antonio Rojas
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Patent number: 10038248Abstract: In one embodiment, a radio-frequency identification (RFID) tag includes multiple orthogonal substrates, a passive RFID integrated circuit chip mounted to one of the substrates, and a three-dimensional tag antenna electrically connected to the chip and extending to each of the orthogonal substrates.Type: GrantFiled: July 6, 2016Date of Patent: July 31, 2018Assignee: University of South FloridaInventors: Ramiro Augusto Ramirez, Thomas McCrea Weller, Eduardo Antonio Rojas
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Patent number: 9836685Abstract: In one embodiment, a radio-frequency identification (RFID) tag including a substrate having a top surface, bottom surface, opposed end surfaces, and opposed lateral surfaces, a passive RFID integrated circuit (IC) chip mounted to the top surface of the substrate, a monopole antenna that includes a planar radiating arm that extends out from the RFID IC chip along the top surface of the substrate and a matching loop having two grounded matching stubs that surround the chip and a portion of the radiating arm, and a ground plane formed on the bottom surface, an end surface, and the top surface of the substrate, the ground plane being electrically coupled to the matching stubs and the radiating arm.Type: GrantFiled: July 20, 2016Date of Patent: December 5, 2017Assignee: University of South FloridaInventors: Ramiro Augusto Ramirez, Thomas McCrea Weller, Eduardo Antonio Rojas