Sharad V Parekh

Address:

5970 Aberdeen Pl, Frisco, TX 75034

VIN:

JHLRE38308C011909

Make:

HONDA

Model:

CR-V

Year:

2008

US Patent:

8542081, Sep 24, 2013

Filed:

Nov 6, 2009

Appl. No.:

12/614185

Inventors:

Sharad Vinodrai Parekh - Dallas TX, US
Kevin Mark Skinner - Gainesville GA, US
Donald Lawson Runyon - Duluth GA, US
David Mark Kokotoff - Alpharetta GA, US

Assignee:

ViaSat, Inc. - Carlsbad CA

International Classification:

H01P 1/02
H01P 1/165
H01P 5/12

US Classification:

333135, 333 21 A, 333126, 333249

Abstract:

In an exemplary embodiment, a dual-band four-port orthomode transducer (OMT) is molded or cast. The OMT may be external to a transceiver housing or included as an integrated portion of the transceiver housing or a drop-in module. In an exemplary embodiment, a four-port OMT is formed from two pieces, the two pieces having a joint adjacent to or aligned to the axis of the common port. In an exemplary embodiment, the OMT is substantially planar and formed of a split-block embodiment. The two OMT pieces are joined and held together with a plurality of discrete fasteners. Furthermore, the OMT is configured to switch polarizations. The polarization switching is initiated using a remote signal and can facilitate load balancing.

US Patent:

54851688, Jan 16, 1996

Filed:

Dec 21, 1994

Appl. No.:

8/360338

Inventors:

Sharad V. Parekh - Dallas TX

Assignee:

Electrospace Systems, Inc. - Richardson TX

International Classification:

H01Q 320

US Classification:

343761

Abstract:

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.

US Patent:

47927704, Dec 20, 1988

Filed:

Jun 29, 1987

Appl. No.:

7/067324

Inventors:

Sharad V. Parekh - Plano TX
Seymour W. Shapiro - Cinnaminson NJ
Charles E. Profera - Cherry Hill NJ

Assignee:

General Electric Company - East Windsor NJ

International Classification:

H01P 518

US Classification:

333113

Abstract:

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. The coupler may include a third waveguide coupled by branch waveguides or other coupling apertures to the second channel.

US Patent:

20200194892, Jun 18, 2020

Filed:

Feb 25, 2020

Appl. No.:

16/800557

Inventors:

- Carlsbad CA, US
Sharad V. Parekh - Frisco TX, US

International Classification:

H01Q 5/45
H04B 7/185
H04H 40/90
H01Q 25/00
H01Q 19/13
H01Q 15/14
H01Q 3/18
H01Q 3/08
H01Q 1/28
H01Q 1/12
H01Q 1/08

Abstract:

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.

US Patent:

20190190151, Jun 20, 2019

Filed:

Feb 11, 2019

Appl. No.:

16/272603

Inventors:

- Carlsbad CA, US
SHARAD V. PAREKH - FRISCO TX, US

International Classification:

H01Q 5/45
H04H 40/90
H01Q 25/00
H01Q 19/13
H01Q 15/14
H01Q 3/18
H01Q 3/08
H04B 7/185
H01Q 1/12
H01Q 1/08
H01Q 1/28

Abstract:

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. The multi-beam antenna further includes an adjustable attachment mechanism attaching the second feed group to the reflector in an adjustable relation to the reflector, whereby a difference between the first direction and the second direction is adjustable.

US Patent:

20170263991, Sep 14, 2017

Filed:

Apr 7, 2017

Appl. No.:

15/482130

Inventors:

- CARLSBAD CA, US
JOHN D VOSS - CUMMING GA, US
DONALD L RUNYON - DULUTH GA, US
SHARAD V PAREKH - FRISCO TX, US
DOMINIC Q NGUYEN - IRVINE CA, US

Assignee:

VIASAT, INC. - CARLSBAD CA

International Classification:

H01P 1/17
H01Q 1/12
H01Q 13/28

Abstract:

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.

US Patent:

20170250455, Aug 31, 2017

Filed:

Oct 1, 2015

Appl. No.:

15/516197

Inventors:

- CARLSBAD CA, US
SHARAD V PAREKH - FRISCO TX, US

Assignee:

VIASAT, INC. - CARLSBAD CA

International Classification:

H01Q 1/08
H01Q 1/28
H01Q 15/14
H01Q 19/13
H04H 40/90
H01Q 3/08
H01Q 3/18
H01Q 5/45
H04B 7/185
H01Q 1/12
H01Q 25/00

Abstract:

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. The multi-beam antenna further includes an adjustable attachment mechanism attaching the second feed group to the reflector in an adjustable relation to the reflector, whereby a difference between the first direction and the second direction is adjustable.

US Patent:

20170179597, Jun 22, 2017

Filed:

Dec 17, 2015

Appl. No.:

14/973705

Inventors:

- Carlsbad CA, US
Sharad V. Parekh - Frisco TX, US

International Classification:

H01Q 5/364
H01Q 13/02

Abstract:

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.