KANTI D PATEL
Land Surveyors in Upper Makefield, PA

7078990, Jul 18, 2006

May 14, 2004

10/845167

Kanti N. Patel - Newtown PA, US
R. Mark Clark - Langhorne PA, US

Lockheed Martin Corporation - Bethesda MD

H01P 7/10, H01P 7/04, H01P 1/20

3332191, 333224, 333202, 333235

A tunable RF cavity resonator having reduced generation of passive inter-modulation, the tunable RF cavity resonator including a cavity body, a fixed tuning post at a first end of the cavity body, a dielectric rod in the fixed tuning post interior space with a first spatial gap between the dielectric rod outer surface and the fixed tuning post inner wall, a tuning screw connected to a first end of the dielectric rod, and a tuning element disposed on a second end of the dielectric rod so that the tuning element moves within the interior space of the fixed tuning post while maintaining a second spatial gap between the tuning element outer surface and the fixed tuning post inner wall. Accordingly, the tuning element forms a short section of very low RF impedance transmission line thereby preventing RF signal leakage through the interior space of the fixed tuning post.

7564419, Jul 21, 2009

Apr 14, 2006

11/403808

Kanti N. Patel - Newtown PA, US

Lockheed Martin Corporation - Bethesda MD

H01Q 19/00

343756, 343909, 343771

A composite polarizer including a first polarizer having a plurality of parallel metal vanes and a second polarizer having a plurality of parallel layers of dielectric material is provided. The first polarizer is disposed on an axis, and has a phase advance orientation orthogonal to the axis. The second polarizer is disposed on the axis and has a phase advance orientation orthogonal to the axis. The first polarizer has a first differential phase shift for a first frequency fand a second differential phase shift for a second frequency f. The second polarizer has a first differential phase shift for the first frequency fand a second differential phase shift for the second frequency f. A total of the first differential phase shifts of the first and second polarizers is about 90°, and a total of the second differential phase shifts of the first and second polarizers is about 90°.

8184057, May 22, 2012

May 28, 2009

12/474208

Kanti N. Patel - Newtown PA, US

Lockheed Martin Corporation - Bethesda MD

H01Q 19/00, H01Q 15/02

343756, 343767, 343786, 343909, 343910

A composite polarizer including a first polarizer having a plurality of parallel metal vanes and a second polarizer having a plurality of parallel layers of dielectric material is provided. The first polarizer is disposed on an axis, and has a phase advance orientation orthogonal to the axis. The second polarizer is disposed on the axis and has a phase advance orientation orthogonal to the axis. The first polarizer has a first differential phase shift for a first frequency fand a second differential phase shift for a second frequency f. The second polarizer has a first differential phase shift for the first frequency fand a second differential phase shift for the second frequency f. A total of the first differential phase shifts of the first and second polarizers is about 90°, and a total of the second differential phase shifts of the first and second polarizers is about 90°.

8248322, Aug 21, 2012

Apr 17, 2012

13/449253

Kanti N. Patel - Newtown PA, US

Lockheed Martin Corporation - Bethesda MD

H01Q 13/10, H01Q 3/10, H01Q 19/10

343786, 343772, 343756, 343909, 343758

A composite polarizer including a first polarizer having a plurality of parallel metal vanes and a second polarizer having a plurality of parallel layers of dielectric material is provided. The first polarizer is disposed on an axis, and has a phase advance orientation orthogonal to the axis. The second polarizer is disposed on the axis and has a phase advance orientation orthogonal to the axis. The first polarizer has a first differential phase shift for a first frequency fand a second differential phase shift for a second frequency f. The second polarizer has a first differential phase shift for the first frequency fand a second differential phase shift for the second frequency f. A total of the first differential phase shifts of the first and second polarizers is about 90°, and a total of the second differential phase shifts of the first and second polarizers is about 90°.

8525616, Sep 3, 2013

Apr 12, 2010

12/758429

Robert K. Shaw - Willow Grove PA, US
Jonathan P. MacGahan - Ivyland PA, US
Sulinder S. Dhanjal - Pennington NJ, US
Erik Lier - Newtown PA, US
Bernard F. Lindinger - Elkins Park PA, US
James W. Matthews - Doylestown PA, US
Kanti N. Patel - Newtown PA, US

Lockheed Martin Corporation - Bethesda MA

H01P 5/12

333135, 333126, 333129

An antenna feed network includes a septum polarizer including a waveguide defining a cavity, wherein a septum is disposed in the cavity to divide the cavity to form a first port and as second port, a diplexer in signal communication with at least one of the first port and the second port of the septum polarizer to route a signal based upon a frequency, and a wave coupler/splitter in signal communication with the diplexer to send and receive signals therebetween, the wave coupler/splitter including a first signal path and a second signal path, wherein the wave coupler/splitter controls a phase shift of a signal transmitted through at least one of the first signal path and the second signal path.

7009464, Mar 7, 2006

Feb 10, 2004

10/776091

Kanti N. Patel - Newtown PA, US

Lockheed Martin Corporation - Bethesda MD

H01P 1/163

333 21A, 333157

A phase error adjustment device configured to connect to an end of a waveguide polarizer and correct phase errors that the waveguide polarizer might generate. In accordance with this embodiment, the phase error adjustment device comprises an aperture having a height and a width, and changes in the dimension of the height or width will change the phase error adjustment quantity. In accordance with another embodiment of the invention, the phase error adjustment device comprises a thickness, and changes in the thickness will change the phase error adjustment quantity.

5986526, Nov 16, 1999

Mar 3, 1997

8/810293

Josef Kopal - Pointe Claire, CA
Gerard Senechal - Sta-Anne-de-Bellevue, CA
Andre Bouvrette - Perrot, CA
Jean-Michel Levesque - Pierrefonds, CA
Kanti Patel - Newtown PA
Christopher Yong - Isle Bizord, CA
Yves Patenaude - Ste-Anna-de-Bellevue, CA
Alexander Csaki - Beaconsfield, CA
Yvan Cote - Bobsbriand, CA
Gerard Carrier - Lachine, CA
Serge Samson - Deux-Montagnes, CA

EMS Technologies Canada, Ltd. - Quebec

H01P 706

333232

An adjustable RF microwave tuning post for use in an RF cavity is disclosed. It is comprised of a flexible integrally-formed hollow tuning post disposed in the RF cavity. A drive shaft extending internally of the tuning post is provided to vary the dimensions of the tuning post. The drive shaft is connected to the tuning post at the top end thereof and connected at the other end of the drive shaft to an adjusting nut. The tuning post is made flexible by the use of bellows, which in a preferred embodiment of the invention is located along the side walls thereof.