Patents by Inventor Sharad V. Parekh
Sharad V. Parekh 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: 11258172Abstract: A multi-beam antenna including a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group located within the first focal region includes a first feed oriented relative to the reflector to define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region that includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction. The multi-beam antenna further includes an adjustable attachment mechanism attaching the second feed group to the reflector, whereby a difference between the first direction and the second direction is adjustable.Type: GrantFiled: February 25, 2020Date of Patent: February 22, 2022Assignee: VIASAT, Inc.Inventors: Donald L. Runyon, Sharad V. Parekh
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Publication number: 20200194892Abstract: A multi-beam antenna including a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group located within the first focal region includes a first feed oriented relative to the reflector to define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region that includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction. The multi-beam antenna further includes an adjustable attachment mechanism attaching the second feed group to the reflector, whereby a difference between the first direction and the second direction is adjustable.Type: ApplicationFiled: February 25, 2020Publication date: June 18, 2020Inventors: Donald L. Runyon, Sharad V. Parekh
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Patent number: 10615498Abstract: In one embodiment, a multi-beam antenna is described. The multi-beam antenna includes a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group is located within the first focal region. The first feed group includes a first feed oriented relative to the reflector define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region. The second feed group includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction.Type: GrantFiled: February 11, 2019Date of Patent: April 7, 2020Assignee: Viasat, Inc.Inventors: Donald L Runyon, Sharad V Parekh
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Patent number: 10418679Abstract: Methods, systems, and devices are described that include one or more septum features to improve performance of a waveguide device. In particular, the septum features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The septum feature(s) may be a ridge. When a plurality of septum features are employed, the location, size, shape and spacing may vary according to a particular design.Type: GrantFiled: July 10, 2018Date of Patent: September 17, 2019Assignee: VIASAT, INC.Inventors: Sharad V Parekh, Dominic Q Nguyen
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Publication number: 20190190151Abstract: In one embodiment, a multi-beam antenna is described. The multi-beam antenna includes a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group is located within the first focal region. The first feed group includes a first feed oriented relative to the reflector define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region. The second feed group includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction.Type: ApplicationFiled: February 11, 2019Publication date: June 20, 2019Inventors: DONALD L. RUNYON, SHARAD V. PAREKH
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Patent number: 10326213Abstract: The present disclosure describes a multi-band antenna having a horn configured to communicate signals in a first frequency band and a second frequency band, an in-line feed, and sidewall feeds. The in-line feed may be coupled to an in-line opening in the horn to communicate signals in the first frequency band. The horn may include first and second openings to communicate signals in the second frequency band. The sidewall feeds may have first and second side feeds respectively coupled to the first and second openings.Type: GrantFiled: December 17, 2015Date of Patent: June 18, 2019Assignee: VIASAT, INC.Inventor: Sharad V Parekh
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Publication number: 20190157734Abstract: Methods, systems, and devices are described that include one or more septum features to improve performance of a waveguide device. In particular, the septum features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The septum feature(s) may be a ridge. When a plurality of septum features are employed, the location, size, shape and spacing may vary according to a particular design.Type: ApplicationFiled: July 10, 2018Publication date: May 23, 2019Applicant: VIASAT, INC.Inventors: SHARAD V PAREKH, DOMINIC Q NGUYEN
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Patent number: 10249951Abstract: In one embodiment, a multi-beam antenna is described. The multi-beam antenna includes a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group is located within the first focal region. The first feed group includes a first feed oriented relative to the reflector define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region. The second feed group includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction.Type: GrantFiled: October 1, 2015Date of Patent: April 2, 2019Assignee: VIASAT, INC.Inventors: Donald L Runyon, Sharad V Parekh
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Patent number: 10020554Abstract: Methods, systems, and devices are described that include one or more septum features to improve performance of a waveguide device. In particular, the septum features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The septum feature(s) may be a ridge. When a plurality of septum features are employed, the location, size, shape and spacing may vary according to a particular design.Type: GrantFiled: November 20, 2015Date of Patent: July 10, 2018Assignee: ViaSat, Inc.Inventors: Sharad V. Parekh, Dominic Q. Nguyen
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Patent number: 9859597Abstract: In an example embodiment, a waveguide device comprises: a first common waveguide; a polarizer section, the polarizer section including a conductive septum dividing the first common waveguide into a first divided waveguide portion and a second waveguide divided portion; a second waveguide coupled to the first divided waveguide portion of the polarizer section; a third waveguide coupled to the second divided waveguide portion of the polarizer section; and a dielectric insert. The dielectric insert includes a first dielectric portion partially filling the polarizer section. The conductive septum and the dielectric portion convert a signal between a polarized state in the first common waveguide and a first polarization component in the second waveguide and a second polarization component in the third waveguide.Type: GrantFiled: April 7, 2017Date of Patent: January 2, 2018Assignee: VIASAT, INC.Inventors: Anders Jensen, John D Voss, Donald L Runyon, Sharad V Parekh, Dominic Q Nguyen
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Publication number: 20170263991Abstract: In an example embodiment, a waveguide device comprises: a first common waveguide; a polarizer section, the polarizer section including a conductive septum dividing the first common waveguide into a first divided waveguide portion and a second waveguide divided portion; a second waveguide coupled to the first divided waveguide portion of the polarizer section; a third waveguide coupled to the second divided waveguide portion of the polarizer section; and a dielectric insert. The dielectric insert includes a first dielectric portion partially filling the polarizer section. The conductive septum and the dielectric portion convert a signal between a polarized state in the first common waveguide and a first polarization component in the second waveguide and a second polarization component in the third waveguide.Type: ApplicationFiled: April 7, 2017Publication date: September 14, 2017Applicant: VIASAT, INC.Inventors: ANDERS JENSEN, JOHN D VOSS, DONALD L RUNYON, SHARAD V PAREKH, DOMINIC Q NGUYEN
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Publication number: 20170250455Abstract: In one embodiment, a multi-beam antenna is described. The multi-beam antenna includes a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group is located within the first focal region. The first feed group includes a first feed oriented relative to the reflector define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region. The second feed group includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction.Type: ApplicationFiled: October 1, 2015Publication date: August 31, 2017Applicant: VIASAT, INC.Inventors: DONALD L RUNYON, SHARAD V PAREKH
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Publication number: 20170179597Abstract: The present disclosure describes a multi-band antenna having a horn configured to communicate signals in a first frequency band and a second frequency band, an in-line feed, and sidewall feeds. The in-line feed may be coupled to an in-line opening in the horn to communicate signals in the first frequency band. The horn may include first and second openings to communicate signals in the second frequency band. The sidewall feeds may have first and second side feeds respectively coupled to the first and second openings.Type: ApplicationFiled: December 17, 2015Publication date: June 22, 2017Inventor: Sharad V. Parekh
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Publication number: 20170047661Abstract: Methods, systems, and devices are described that include one or more septum features to improve performance of a waveguide device. In particular, the septum features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The septum feature(s) may be a ridge. When a plurality of septum features are employed, the location, size, shape and spacing may vary according to a particular design.Type: ApplicationFiled: November 20, 2015Publication date: February 16, 2017Inventors: Sharad V. Parekh, Dominic Q. Nguyen
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Patent number: 9571183Abstract: The described technology uses a dual circularly polarized panel antenna and equal amplitude variable phase control between the two circularly polarized components to achieve a rotatable linear polarization tracking system. An example antenna system includes a plurality of antenna elements that include a plurality of polarization transducers to generate a first signal component and a second signal component from a received wave. A polarization control network applies a phase difference based on an orientation of the linear polarization of the wave with respect to the antenna system between the signal components to generate adjusted signal components. The polarization control network combines the adjusted signal components to form a composite signal that corresponds to the linear polarization of the wave. Linearly polarized transmit and receive signals may be co-polarized or cross-polarized.Type: GrantFiled: June 30, 2015Date of Patent: February 14, 2017Assignee: ViaSat, Inc.Inventors: Donald L. Runyon, Sharad V. Parekh
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Publication number: 20150381265Abstract: The described technology uses a dual circularly polarized panel antenna and equal amplitude variable phase control between the two circularly polarized components to achieve a rotatable linear polarization tracking system. An example antenna system includes a plurality of antenna elements that include a plurality of polarization transducers to generate a first signal component and a second signal component from a received wave. A polarization control network applies a phase difference based on an orientation of the linear polarization of the wave with respect to the antenna system between the signal components to generate adjusted signal components. The polarization control network combines the adjusted signal components to form a composite signal that corresponds to the linear polarization of the wave. Linearly polarized transmit and receive signals may be co-polarized or cross-polarized.Type: ApplicationFiled: June 30, 2015Publication date: December 31, 2015Inventors: Donald L. Runyon, Sharad V. Parekh
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Patent number: 5485168Abstract: A multiband satellite communication antenna system includes a primary reflector and one or more movable subreflectors. A system with one subreflector operates at a first band when the subreflector is in a deployed position and reflects energy between a first feed and the primary antenna. When the subreflector is at a second, stowed, position, the primary reflector operates directly into a second feed. A communication antenna system with two subreflectors can operate at three bands under the conditions of having either both subreflectors stowed; the first subreflector deployed and the second subreflector stowed; or both subreflectors deployed.Type: GrantFiled: December 21, 1994Date of Patent: January 16, 1996Assignee: Electrospace Systems, Inc.Inventor: Sharad V. Parekh
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Patent number: 4792770Abstract: A reduced size waveguide directional coupler assembly includes a first rectangular waveguide which is adapted to receive signal at an input port. A conductive septum parallel with a broad wall of the rectangular waveguide divides the signal into two portions flowing in first and second channels within the first waveguide. The septum may be centered between the broad walls, in which case the two signal portions and channel dimensions are the same, or the septum may be off-center, resulting in dissimilar amplitudes of the two signal portions. The coupler also includes a second waveguide. Branch waveguides or other coupling apertures open from the first channel into the second waveguide. That energy not flowing to the second waveguide from the first channel may be routed to an independent output port, or may be recombined with the energy flowing in the second channel and routed to a combined output port.Type: GrantFiled: June 29, 1987Date of Patent: December 20, 1988Assignee: General Electric CompanyInventors: Sharad V. Parekh, Seymour W. Shapiro, Charles E. Profera, Jr.
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Patent number: 4625214Abstract: A dual gridded antenna reflector system and method for constructing the same is disclosed. The reflector system comprises a pair of reflector dishes each having a grid of parallel conductors. One of the reflector dishes is mounted over the other reflector dish by linear support ribs therebetween such that the conductors of the one reflector dish are perpendicular to the conductor of the other reflector dish. The linear support ribs are placed perpendicular to or parallel to the conductors of the overlapped reflector and are placed substantially outside of the high field region across the aperture of the overlapped reflector.Type: GrantFiled: October 15, 1984Date of Patent: November 25, 1986Assignee: RCA CorporationInventor: Sharad V. Parekh